diff --git a/doc/docs.html b/doc/docs.html
index 4c06e8249e9..1f9ae76369e 100644
--- a/doc/docs.html
+++ b/doc/docs.html
@@ -164,7 +164,7 @@ A panel discussion with David Symonds, Robert Griesemer, Rob Pike, Ken Thompson,
A talk by Rob Pike and Andrew Gerrand presented at Google I/O 2011.
It walks through the construction and deployment of a simple web application
and unveils the Go runtime for App Engine.
-See the presentation slides.
+See the presentation slides.
Released as an open source project in November 2009
-
Development continues with an active community
-
-
-
Why invent a new language? Older languages weren't designed for concurrency, but modern software needs it:
-
-
Large scale, networked computing, such as Google web search
-
Multi-core hardware
-
-
-
-
-
New
-
-
Older languages are also frustrating on a day-to-day basis
-
Statically-typed languages (C, C++, Java) have issues:
-
-
Edit-Compile-Run cycle takes far too long
-
Type hierarchy can hurt as much as it helps
-
-
-
-
-
-
Dynamic languages (Python, JavaScript) fix some issues but introduce others:
-
-
No compilation means slow code
-
Runtime errors that should be caught statically
-
-
-
Go has the lighter feel of a scripting language but is compiled
-
-
-
-
New
-
-
Large C++ programs (e.g. Firefox, OpenOffice, Chromium) have enormous build times:
-
-
XKCD's #1 Programmer Excuse for Legitimately Slacking Off: "My Code's Compiling"
-
-
-
On a Mac (OS X 10.5.8, gcc 4.0.1):
-
-
C: #include <stdio.h> reads 360 lines from 9 files
-
C++: #include <iostream> reads 25,326 lines from 131 files
-
Objective-C: #include <Carbon/Carbon.h> reads 124,730 lines from 689 files
-
We haven't done any real work yet!
-
-
-
In Go: import "fmt" reads one file: 184 lines summarizing 7 packages
-
-
-
-
New
-
-
Compilation demo
-
-
-
-
Experimental
-
-
Go is still unproven
-
Language is still evolving
-
Package library is incomplete
-
Concurrent garbage collection is an active research problem
-
Reviving forgotten concepts:
-
-
Go's concurrency is strongly influenced by Communicating Sequential Processes (Hoare, 1978)
-
Go has types and interfaces, but no inheritance. It is arguably more object-oriented than previously mentioned languages, being closer to the original Smalltalk meaning (1970s)
-
-
-
-
-
Concurrent
-
-
Unix philosophy: write programs that do one thing and do it well
-
Connect them with pipes:
-
-
How many lines of test code are there in the Go standard library?
-
find ~/go/src/pkg | grep _test.go$ | xargs wc -l
-
-
-
Unlike other languages, Go makes it easy to:
-
-
Launch goroutines
-
Connect them with channels
-
-
-
-
-
Concurrent
-
-
Start a new flow of control with the go keyword
-
Parallel computation is easy:
-
-func main() {
- go expensiveComputation(x, y, z)
- anotherExpensiveComputation(a, b, c)
-}
-
-
-
Roughly speaking, a goroutine is like a thread, but lighter weight:
-
-
Goroutines have segmented stacks, and typically smaller stacks
-
This requires compiler support. Goroutines can't just be a C++ library on top of a thread library
-
-
-
-
-
Concurrent
-
-
Consider web servers ("the C10k problem"):
-
-
"Thread per connection" approach is conceptually neat, but doesn't scale well in practice
-
What does scale well (event-driven callbacks, asynchronous APIs) are harder to understand, maintain, and debug
-
We think "goroutine per connection" can scale well, and is conceptually neat
-
-
- for {
- rw := socket.Accept()
- conn := newConn(rw, handler)
- go conn.serve()
- }
-
-
-
-
-
Concurrent
-
-
Let's look again at our simple parallel computation:
-
-func main() {
- go expensiveComputation(x, y, z)
- anotherExpensiveComputation(a, b, c)
-}
-
-
-
This story is incomplete:
-
-
How do we know when the two computations are done?
-
What are their values?
-
-
-
-
-
Concurrent
-
-
Goroutines communicate with other goroutines via channels
-
-func computeAndSend(ch chan int, x, y, z int) {
- ch <- expensiveComputation(x, y, z)
-}
-
-func main() {
- ch := make(chan int)
- go computeAndSend(ch, x, y, z)
- v2 := anotherExpensiveComputation(a, b, c)
- v1 := <-ch
- fmt.Println(v1, v2)
-}
-
-
-
-
-
-
Concurrent
-
-
In traditional concurrent programs, you communicate by sharing memory. In Go, you share memory by communicating:
-
-
Communication (the <- operator) is sharing and synchronization
-
-
-
Threads and locks are concurrency primitives; CSP is a concurrency model:
-
-
Analogy: "Go To Statement Considered Harmful" (Dijsktra, 1968)
-
goto is a control flow primitive; structured programming (if statements, for loops, function calls) is a control flow model
-
-
-
Learning CSP changes the way you think about concurrent programming:
-
-
Every language has its grain. If your Go program uses mutexes, you're probably working against the grain
-
-
-
-
-
Garbage Collected
-
-
Automatic memory management makes writing (and maintaining) programs easier
-
Especially in a concurrent world:
-
-
Who "owns" a shared piece of memory, and is responsible for destroying it?
-
-
-
Large C++ programs usually end up with semi-automatic memory management anyway, via "smart pointers"
-
Mixing the two models can be problematic:
-
-
Browsers can leak memory easily; DOM elements are C++ objects, but JavaScript is garbage collected
-
-
-
-
-
Garbage Collected
-
-
Go is also a safer language:
-
-
Pointers but no pointer arithmetic
-
No dangling pointers
-
Variables are zero-initialized
-
Array access is bounds-checked
-
-
-
No buffer overflow exploits
-
-
-
-
Systems Language
-
-
This just means you could write decently large programs in Go:
-
-
Web servers
-
Web browsers
-
Web crawlers
-
Search indexers
-
Databases
-
Word processors
-
Integrated Development Environments (IDEs)
-
Operating systems
-
...
-
-
-
-
-
Systems Language
-
-
Garbage collection has a reputation for being "slower"
-
We're expecting Go to be slightly slower than optimized C, but faster than Java, depending on the task. Nonetheless:
-
-
Fast and buggy is worse than almost-as-fast and correct
-
It is easier to optimize a correct program than to correct an optimized program
-
Fundamentally, it's simply a trade-off we're willing to make
-
-
-
Memory layout can drastically affect performance. These two designs are equivalent in Go, but significantly different in Java:
-
-type Point struct { X, Y int }
-type Rect struct { P0, P1 Point }
-
-// or ...
-
-type Rect struct { X0, Y0, X1, Y1 int }
-
-
-
-
-
Systems Language
-
-
Quote from http://loadcode.blogspot.com/2009/12/go-vs-java.html
-
-
-"[Git] is known to be very fast. It is written in C. A Java version
-JGit was made. It was considerably slower. Handling of memory and lack
-of unsigned types was some of the important reasons.
-
-
-
Shawn O. Pearce wrote on the git mailinglist:
-
"JGit struggles with not
-having an efficient way to represent a SHA-1. C can just say "unsigned
-char[20]" and have it inline into the container's memory allocation. A
-byte[20] in Java will cost an *additional* 16 bytes of memory, and be
-slower to access because the bytes themselves are in a different area
-of memory from the container object. We try to work around it by
-converting from a byte[20] to 5 ints, but that costs us machine
-instructions"
-
-
-
-Like C, Go does allow unsigned types and defining data structures
-containing other data structures as continuous blocks of memory."
-
-
-
-
-
Go
-
-
New
-
Experimental
-
Concurrent
-
Garbage Collected
-
Systems Language
-
-
And more:
-
-
I haven't talked about the type system, interfaces, slices, closures, selects, ...
-
Documentation, mailing list, source code all online
-
-
-
-
-
Questions?
-
-
-
-
-
-
-
diff --git a/doc/talks/gofrontend-gcc-summit-2010.pdf b/doc/talks/gofrontend-gcc-summit-2010.pdf
deleted file mode 100644
index 157fd7676b3..00000000000
Binary files a/doc/talks/gofrontend-gcc-summit-2010.pdf and /dev/null differ
diff --git a/doc/talks/io2010/balance.go b/doc/talks/io2010/balance.go
deleted file mode 100644
index a3825cbc559..00000000000
--- a/doc/talks/io2010/balance.go
+++ /dev/null
@@ -1,168 +0,0 @@
-// Copyright 2010 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package main
-
-import (
- "container/heap"
- "flag"
- "fmt"
- "math/rand"
- "time"
-)
-
-const nRequester = 100
-const nWorker = 10
-
-var roundRobin = flag.Bool("r", false, "use round-robin scheduling")
-
-// Simulation of some work: just sleep for a while and report how long.
-func op() int {
- n := rand.Int63n(1e9)
- time.Sleep(nWorker * n)
- return int(n)
-}
-
-type Request struct {
- fn func() int
- c chan int
-}
-
-func requester(work chan Request) {
- c := make(chan int)
- for {
- time.Sleep(rand.Int63n(nWorker * 2e9))
- work <- Request{op, c}
- <-c
- }
-}
-
-type Worker struct {
- i int
- requests chan Request
- pending int
-}
-
-func (w *Worker) work(done chan *Worker) {
- for {
- req := <-w.requests
- req.c <- req.fn()
- done <- w
- }
-}
-
-type Pool []*Worker
-
-func (p Pool) Len() int { return len(p) }
-
-func (p Pool) Less(i, j int) bool {
- return p[i].pending < p[j].pending
-}
-
-func (p *Pool) Swap(i, j int) {
- a := *p
- a[i], a[j] = a[j], a[i]
- a[i].i = i
- a[j].i = j
-}
-
-func (p *Pool) Push(x interface{}) {
- a := *p
- n := len(a)
- a = a[0 : n+1]
- w := x.(*Worker)
- a[n] = w
- w.i = n
- *p = a
-}
-
-func (p *Pool) Pop() interface{} {
- a := *p
- *p = a[0 : len(a)-1]
- w := a[len(a)-1]
- w.i = -1 // for safety
- return w
-}
-
-type Balancer struct {
- pool Pool
- done chan *Worker
- i int
-}
-
-func NewBalancer() *Balancer {
- done := make(chan *Worker, nWorker)
- b := &Balancer{make(Pool, 0, nWorker), done, 0}
- for i := 0; i < nWorker; i++ {
- w := &Worker{requests: make(chan Request, nRequester)}
- heap.Push(&b.pool, w)
- go w.work(b.done)
- }
- return b
-}
-
-func (b *Balancer) balance(work chan Request) {
- for {
- select {
- case req := <-work:
- b.dispatch(req)
- case w := <-b.done:
- b.completed(w)
- }
- b.print()
- }
-}
-
-func (b *Balancer) print() {
- sum := 0
- sumsq := 0
- for _, w := range b.pool {
- fmt.Printf("%d ", w.pending)
- sum += w.pending
- sumsq += w.pending * w.pending
- }
- avg := float64(sum) / float64(len(b.pool))
- variance := float64(sumsq)/float64(len(b.pool)) - avg*avg
- fmt.Printf(" %.2f %.2f\n", avg, variance)
-}
-
-func (b *Balancer) dispatch(req Request) {
- if *roundRobin {
- w := b.pool[b.i]
- w.requests <- req
- w.pending++
- b.i++
- if b.i >= len(b.pool) {
- b.i = 0
- }
- return
- }
-
- w := heap.Pop(&b.pool).(*Worker)
- w.requests <- req
- w.pending++
- // fmt.Printf("started %p; now %d\n", w, w.pending)
- heap.Push(&b.pool, w)
-}
-
-func (b *Balancer) completed(w *Worker) {
- if *roundRobin {
- w.pending--
- return
- }
-
- w.pending--
- // fmt.Printf("finished %p; now %d\n", w, w.pending)
- heap.Remove(&b.pool, w.i)
- heap.Push(&b.pool, w)
-}
-
-func main() {
- flag.Parse()
- work := make(chan Request)
- for i := 0; i < nRequester; i++ {
- go requester(work)
- }
- NewBalancer().balance(work)
-}
diff --git a/doc/talks/io2010/decrypt.go b/doc/talks/io2010/decrypt.go
deleted file mode 100644
index e63418b1ae8..00000000000
--- a/doc/talks/io2010/decrypt.go
+++ /dev/null
@@ -1,85 +0,0 @@
-// Copyright 2010 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// This code differs from the slides in that it handles errors.
-
-package main
-
-import (
- "crypto/aes"
- "crypto/cipher"
- "compress/gzip"
- "io"
- "log"
- "os"
-)
-
-func EncryptAndGzip(dstfile, srcfile string, key, iv []byte) error {
- r, err := os.Open(srcfile)
- if err != nil {
- return err
- }
- var w io.Writer
- w, err = os.Create(dstfile)
- if err != nil {
- return err
- }
- c, err := aes.NewCipher(key)
- if err != nil {
- return err
- }
- w = cipher.StreamWriter{S: cipher.NewOFB(c, iv), W: w}
- w2, err := gzip.NewWriter(w)
- if err != nil {
- return err
- }
- defer w2.Close()
- _, err = io.Copy(w2, r)
- return err
-}
-
-func DecryptAndGunzip(dstfile, srcfile string, key, iv []byte) error {
- f, err := os.Open(srcfile)
- if err != nil {
- return err
- }
- defer f.Close()
- c, err := aes.NewCipher(key)
- if err != nil {
- return err
- }
- r := cipher.StreamReader{S: cipher.NewOFB(c, iv), R: f}
- r2, err := gzip.NewReader(r)
- if err != nil {
- return err
- }
- w, err := os.Create(dstfile)
- if err != nil {
- return err
- }
- defer w.Close()
- _, err = io.Copy(w, r2)
- return err
-}
-
-func main() {
- err := EncryptAndGzip(
- "/tmp/passwd.gz",
- "/etc/passwd",
- make([]byte, 16),
- make([]byte, 16),
- )
- if err != nil {
- log.Fatal(err)
- }
- err = DecryptAndGunzip(
- "/dev/stdout",
- "/tmp/passwd.gz",
- make([]byte, 16),
- make([]byte, 16),
- )
- if err != nil {
- log.Fatal(err)
- }
-}
diff --git a/doc/talks/io2010/encrypt.go b/doc/talks/io2010/encrypt.go
deleted file mode 100644
index 57c888c7414..00000000000
--- a/doc/talks/io2010/encrypt.go
+++ /dev/null
@@ -1,52 +0,0 @@
-// Copyright 2010 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// This code differs from the slides in that it handles errors.
-
-package main
-
-import (
- "crypto/aes"
- "crypto/cipher"
- "compress/gzip"
- "io"
- "log"
- "os"
-)
-
-func EncryptAndGzip(dstfile, srcfile string, key, iv []byte) error {
- r, err := os.Open(srcfile)
- if err != nil {
- return err
- }
- var w io.WriteCloser
- w, err = os.Create(dstfile)
- if err != nil {
- return err
- }
- defer w.Close()
- w, err = gzip.NewWriter(w)
- if err != nil {
- return err
- }
- defer w.Close()
- c, err := aes.NewCipher(key)
- if err != nil {
- return err
- }
- _, err = io.Copy(cipher.StreamWriter{S: cipher.NewOFB(c, iv), W: w}, r)
- return err
-}
-
-func main() {
- err := EncryptAndGzip(
- "/tmp/passwd.gz",
- "/etc/passwd",
- make([]byte, 16),
- make([]byte, 16),
- )
- if err != nil {
- log.Fatal(err)
- }
-}
diff --git a/doc/talks/io2010/eval1.go b/doc/talks/io2010/eval1.go
deleted file mode 100644
index 582f43e8ea2..00000000000
--- a/doc/talks/io2010/eval1.go
+++ /dev/null
@@ -1,227 +0,0 @@
-// Copyright 2010 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package main
-
-import (
- "bufio"
- "fmt"
- "os"
- "strconv"
- "strings"
-)
-
-// Generic expression parser/evaluator
-
-type Value interface {
- String() string
- BinaryOp(op string, y Value) Value
-}
-
-type Parser struct {
- precTab map[string]int
- newVal func(string) Value
- src string
- pos int
- tok string
-}
-
-const alphanum = "_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
-
-func (p *Parser) stop(c uint8) bool {
- switch {
- case p.pos >= len(p.src):
- return true
- case c == '"':
- if p.src[p.pos] == '"' {
- p.pos++
- return true
- }
- return false
- case strings.IndexRune(alphanum, int(c)) >= 0:
- return strings.IndexRune(alphanum, int(p.src[p.pos])) < 0
- }
- return true
-}
-
-func (p *Parser) next() {
- // skip blanks
- for ; p.pos < len(p.src) && p.src[p.pos] <= ' '; p.pos++ {
- }
- if p.pos >= len(p.src) {
- p.tok = ""
- return
- }
- start := p.pos
- c := p.src[p.pos]
- for p.pos < len(p.src) {
- p.pos++
- if p.stop(c) {
- break
- }
- }
- p.tok = p.src[start:p.pos]
-}
-
-func (p *Parser) binaryExpr(prec1 int) Value {
- x := p.newVal(p.tok)
- p.next()
- for prec := p.precTab[p.tok]; prec >= prec1; prec-- {
- for p.precTab[p.tok] == prec {
- op := p.tok
- p.next()
- y := p.binaryExpr(prec + 1)
- x = x.BinaryOp(op, y)
- }
- }
- return x
-}
-
-func Eval(precTab map[string]int, newVal func(string) Value, src string) Value {
- var p Parser
- p.precTab = precTab
- p.newVal = newVal
- p.src = src
- p.next()
- return p.binaryExpr(1)
-}
-
-// Command-line expression evaluator
-
-func main() {
- r := bufio.NewReader(os.Stdin)
- for {
- fmt.Printf("> ")
- line, err := r.ReadString('\n')
- if err != nil {
- break
- }
- fmt.Printf("%s\n", Eval(precTab, trace(newVal), line))
- }
-}
-
-// Custom grammar and values
-
-var precTab = map[string]int{
- "&&": 1,
- "||": 2,
- "==": 3,
- "!=": 3,
- "<": 3,
- "<=": 3,
- ">": 3,
- ">=": 3,
- "+": 4,
- "-": 4,
- "*": 5,
- "/": 5,
- "%": 5,
-}
-
-func newVal(lit string) Value {
- x, err := strconv.Atoi(lit)
- if err == nil {
- return Int(x)
- }
- b, err := strconv.ParseBool(lit)
- if err == nil {
- return Bool(b)
- }
- return Error(fmt.Sprintf("illegal literal '%s'", lit))
-}
-
-type Error string
-
-func (e Error) String() string { return string(e) }
-func (e Error) BinaryOp(op string, y Value) Value { return e }
-
-type Int int
-
-func (x Int) String() string { return strconv.Itoa(int(x)) }
-func (x Int) BinaryOp(op string, y Value) Value {
- switch y := y.(type) {
- case Error:
- return y
- case Int:
- switch op {
- case "+":
- return x + y
- case "-":
- return x - y
- case "*":
- return x * y
- case "/":
- return x / y
- case "%":
- return x % y
- case "==":
- return Bool(x == y)
- case "!=":
- return Bool(x != y)
- case "<":
- return Bool(x < y)
- case "<=":
- return Bool(x <= y)
- case ">":
- return Bool(x > y)
- case ">=":
- return Bool(x >= y)
- }
- }
- return Error(fmt.Sprintf("illegal operation: '%v %s %v'", x, op, y))
-}
-
-type Bool bool
-
-func (x Bool) String() string { return strconv.FormatBool(bool(x)) }
-func (x Bool) BinaryOp(op string, y Value) Value {
- switch y := y.(type) {
- case Error:
- return y
- case Bool:
- switch op {
- case "&&":
- return Bool(x && y)
- case "||":
- return Bool(x || y)
- case "==":
- return Bool(x == y)
- case "!=":
- return Bool(x != y)
- }
- }
- return Error(fmt.Sprintf("illegal operation: '%v %s %v'", x, op, y))
-}
-
-func trace(newVal func(string) Value) func(string) Value {
- return func(s string) Value {
- v := newVal(s)
- fmt.Printf("\tnewVal(%q) = %s\n", s, fmtv(v))
- return &traceValue{v}
- }
-}
-
-type traceValue struct {
- Value
-}
-
-func (x *traceValue) BinaryOp(op string, y Value) Value {
- z := x.Value.BinaryOp(op, y.(*traceValue).Value)
- fmt.Printf("\t%s.BinaryOp(%q, %s) = %s\n", fmtv(x.Value), op, fmtv(y.(*traceValue).Value), fmtv(z))
- return &traceValue{z}
-}
-
-func (x *traceValue) String() string {
- s := x.Value.String()
- fmt.Printf("\t%s.String() = %#v\n", fmtv(x.Value), s)
- return s
-}
-
-func fmtv(v Value) string {
- t := fmt.Sprintf("%T", v)
- if i := strings.LastIndex(t, "."); i >= 0 { // strip package
- t = t[i+1:]
- }
- return fmt.Sprintf("%s(%#v)", t, v)
-}
diff --git a/doc/talks/io2010/eval2.go b/doc/talks/io2010/eval2.go
deleted file mode 100644
index 6f826e12d09..00000000000
--- a/doc/talks/io2010/eval2.go
+++ /dev/null
@@ -1,259 +0,0 @@
-// Copyright 2010 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package main
-
-import (
- "bufio"
- "fmt"
- "os"
- "strconv"
- "strings"
-)
-
-// Generic expression parser/evaluator
-
-type Value interface {
- String() string
- BinaryOp(op string, y Value) Value
-}
-
-type Parser struct {
- precTab map[string]int
- newVal func(string) Value
- src string
- pos int
- tok string
-}
-
-const alphanum = "_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
-
-func (p *Parser) stop(c uint8) bool {
- switch {
- case p.pos >= len(p.src):
- return true
- case c == '"':
- if p.src[p.pos] == '"' {
- p.pos++
- return true
- }
- return false
- case strings.IndexRune(alphanum, int(c)) >= 0:
- return strings.IndexRune(alphanum, int(p.src[p.pos])) < 0
- }
- return true
-}
-
-func (p *Parser) next() {
- // skip blanks
- for ; p.pos < len(p.src) && p.src[p.pos] <= ' '; p.pos++ {
- }
- if p.pos >= len(p.src) {
- p.tok = ""
- return
- }
- start := p.pos
- c := p.src[p.pos]
- for p.pos < len(p.src) {
- p.pos++
- if p.stop(c) {
- break
- }
- }
- p.tok = p.src[start:p.pos]
-}
-
-func (p *Parser) binaryExpr(prec1 int) Value {
- x := p.newVal(p.tok)
- p.next()
- for prec := p.precTab[p.tok]; prec >= prec1; prec-- {
- for p.precTab[p.tok] == prec {
- op := p.tok
- p.next()
- y := p.binaryExpr(prec + 1)
- x = x.BinaryOp(op, y)
- }
- }
- return x
-}
-
-func Eval(precTab map[string]int, newVal func(string) Value, src string) Value {
- var p Parser
- p.precTab = precTab
- p.newVal = newVal
- p.src = src
- p.next()
- return p.binaryExpr(1)
-}
-
-// Command-line expression evaluator
-
-func main() {
- r := bufio.NewReader(os.Stdin)
- for {
- fmt.Printf("> ")
- line, err := r.ReadString('\n')
- if err != nil {
- break
- }
- fmt.Printf("%s\n", Eval(precTab, trace(newVal), line))
- }
-}
-
-// Custom grammar and values
-
-var precTab = map[string]int{
- "&&": 1,
- "||": 2,
- "==": 3,
- "!=": 3,
- "<": 3,
- "<=": 3,
- ">": 3,
- ">=": 3,
- "+": 4,
- "-": 4,
- "*": 5,
- "/": 5,
- "%": 5,
-}
-
-func newVal(lit string) Value {
- x, err := strconv.Atoi(lit)
- if err == nil {
- return Int(x)
- }
- b, err := strconv.ParseBool(lit)
- if err == nil {
- return Bool(b)
- }
- s, err := strconv.Unquote(lit)
- if err == nil {
- return String(s)
- }
- return Error(fmt.Sprintf("illegal literal '%s'", lit))
-}
-
-type Error string
-
-func (e Error) String() string { return string(e) }
-func (e Error) BinaryOp(op string, y Value) Value { return e }
-
-type Int int
-
-func (x Int) String() string { return strconv.Itoa(int(x)) }
-func (x Int) BinaryOp(op string, y Value) Value {
- switch y := y.(type) {
- case Error:
- return y
- case String:
- switch op {
- case "*":
- return String(strings.Repeat(string(y), int(x)))
- }
- case Int:
- switch op {
- case "+":
- return x + y
- case "-":
- return x - y
- case "*":
- return x * y
- case "/":
- return x / y
- case "%":
- return x % y
- case "==":
- return Bool(x == y)
- case "!=":
- return Bool(x != y)
- case "<":
- return Bool(x < y)
- case "<=":
- return Bool(x <= y)
- case ">":
- return Bool(x > y)
- case ">=":
- return Bool(x >= y)
- }
- }
- return Error(fmt.Sprintf("illegal operation: '%v %s %v'", x, op, y))
-}
-
-type Bool bool
-
-func (x Bool) String() string { return strconv.FormatBool(bool(x)) }
-func (x Bool) BinaryOp(op string, y Value) Value {
- switch y := y.(type) {
- case Error:
- return y
- case Bool:
- switch op {
- case "&&":
- return Bool(x && y)
- case "||":
- return Bool(x || y)
- case "==":
- return Bool(x == y)
- case "!=":
- return Bool(x != y)
- }
- }
- return Error(fmt.Sprintf("illegal operation: '%v %s %v'", x, op, y))
-}
-
-type String string
-
-func (x String) String() string { return strconv.Quote(string(x)) }
-func (x String) BinaryOp(op string, y Value) Value {
- switch y := y.(type) {
- case Error:
- return y
- case Int:
- switch op {
- case "*":
- return String(strings.Repeat(string(x), int(y)))
- }
- case String:
- switch op {
- case "+":
- return x + y
- case "<":
- return Bool(x < y)
- }
- }
- return Error(fmt.Sprintf("illegal operation: '%v %s %v'", x, op, y))
-}
-
-func trace(newVal func(string) Value) func(string) Value {
- return func(s string) Value {
- v := newVal(s)
- fmt.Printf("\tnewVal(%q) = %s\n", s, fmtv(v))
- return &traceValue{v}
- }
-}
-
-type traceValue struct {
- Value
-}
-
-func (x *traceValue) BinaryOp(op string, y Value) Value {
- z := x.Value.BinaryOp(op, y.(*traceValue).Value)
- fmt.Printf("\t%s.BinaryOp(%q, %s) = %s\n", fmtv(x.Value), op, fmtv(y.(*traceValue).Value), fmtv(z))
- return &traceValue{z}
-}
-
-func (x *traceValue) String() string {
- s := x.Value.String()
- fmt.Printf("\t%s.String() = %#v\n", fmtv(x.Value), s)
- return s
-}
-
-func fmtv(v Value) string {
- t := fmt.Sprintf("%T", v)
- if i := strings.LastIndex(t, "."); i >= 0 { // strip package
- t = t[i+1:]
- }
- return fmt.Sprintf("%s(%#v)", t, v)
-}
diff --git a/doc/talks/io2010/talk.pdf b/doc/talks/io2010/talk.pdf
deleted file mode 100644
index aff42c21d4a..00000000000
Binary files a/doc/talks/io2010/talk.pdf and /dev/null differ
diff --git a/doc/talks/io2011/Real_World_Go.pdf b/doc/talks/io2011/Real_World_Go.pdf
deleted file mode 100644
index 2a187116ba5..00000000000
Binary files a/doc/talks/io2011/Real_World_Go.pdf and /dev/null differ
diff --git a/doc/talks/io2011/Writing_Web_Apps_in_Go.pdf b/doc/talks/io2011/Writing_Web_Apps_in_Go.pdf
deleted file mode 100644
index ca4702ee969..00000000000
Binary files a/doc/talks/io2011/Writing_Web_Apps_in_Go.pdf and /dev/null differ
diff --git a/doc/talks/java-typing.png b/doc/talks/java-typing.png
deleted file mode 100644
index 54abf018646..00000000000
Binary files a/doc/talks/java-typing.png and /dev/null differ
diff --git a/doc/talks/slidy.css b/doc/talks/slidy.css
deleted file mode 100644
index e9ff53218fa..00000000000
--- a/doc/talks/slidy.css
+++ /dev/null
@@ -1,277 +0,0 @@
-/* http://www.w3.org/Talks/Tools/Slidy/slidy.css
-
- Copyright (c) 2005 W3C (MIT, ERCIM, Keio), All Rights Reserved.
- W3C liability, trademark, document use and software licensing
- rules apply, see:
-
- http://www.w3.org/Consortium/Legal/copyright-documents
- http://www.w3.org/Consortium/Legal/copyright-software
-*/
-body
-{
- margin: 0 0 0 0;
- padding: 0 0 0 0;
- width: 100%;
- height: 100%;
- color: black;
- background-color: white;
- font-family: "Lucida Sans", "Lucida Grande", Lucida, sans-serif;
- font-size: 14pt;
-}
-
-.hidden { display: none; visibility: hidden }
-
-div.toolbar {
- position: fixed; z-index: 200;
- top: auto; bottom: 0; left: 0; right: 0;
- height: 1.2em; text-align: right;
- padding-left: 1em;
- padding-right: 1em;
- font-size: 60%;
- color: red; background: rgb(240,240,240);
-}
-
-div.background {
- display: none;
-}
-
-div.handout {
- margin-left: 20px;
- margin-right: 20px;
-}
-
-div.slide.titlepage {
- color: white;
- background: black;
- text-align: center;
-}
-
-div.slide {
- z-index: 20;
- margin: 0 0 0 0;
- padding-top: 0;
- padding-bottom: 0;
- padding-left: 20px;
- padding-right: 20px;
- border-width: 0;
- top: 0;
- bottom: 0;
- left: 0;
- right: 0;
- line-height: 120%;
- background-color: transparent;
-}
-
-/* this rule is hidden from IE 6 and below which don't support + selector */
-div.slide + div[class].slide { page-break-before: always;}
-
-div.slide h1 {
- padding-left: 20px;
- padding-right: 20px;
- padding-top: 10px;
- padding-bottom: 10px;
- margin-top: 0;
- margin-left: 0;
- margin-right: 0;
- margin-bottom: 0.5em;
- border-bottom: 4px solid #36c;
- display: block;
- font-size: 160%;
- line-height: 1.2em;
-}
-
-div.slide h2 {
- font-size:120%;
- line-height: 1.2em;
-}
-
-div.toc {
- position: absolute;
- top: auto;
- bottom: 4em;
- left: 4em;
- right: auto;
- width: 60%;
- max-width: 30em;
- height: 30em;
- border: solid thin black;
- padding: 1em;
- background: rgb(240,240,240);
- color: black;
- z-index: 300;
- overflow: auto;
- display: block;
- visibility: visible;
-}
-
-div.toc-heading {
- width: 100%;
- border-bottom: solid 1px rgb(180,180,180);
- margin-bottom: 1em;
- text-align: center;
-}
-
-pre {
- font-size: 120%;
- font-weight: bold;
- line-height: 140%;
- padding-top: 0.2em;
- padding-bottom: 0.2em;
- padding-left: 1em;
- padding-right: 1em;
-/*
- border-style: solid;
- border-left-width: 1em;
- border-top-width: thin;
- border-right-width: thin;
- border-bottom-width: thin;
- border-color: #95ABD0;
-*/
- color: #0F398D;
- background-color: #fff8f8;
-}
-
-@media print {
- div.slide {
- display: block;
- visibility: visible;
- position: relative;
- border-top-style: solid;
- border-top-width: thin;
- border-top-color: black;
- }
- div.slide pre { font-size: 60%; padding-left: 0.5em; }
- div.handout { display: block; visibility: visible; }
-}
-
-blockquote { font-style: italic }
-
-img { background-color: transparent }
-
-p.copyright { font-size: smaller }
-
-.center { text-align: center }
-.footnote { font-size: smaller; margin-left: 2em; }
-
-a img { border-width: 0; border-style: none }
-
-a:visited { color: navy }
-a:link { color: navy }
-a:hover { color: red; text-decoration: underline }
-a:active { color: red; text-decoration: underline }
-
-a {text-decoration: none}
-.navbar a:link {color: white}
-.navbar a:visited {color: yellow}
-.navbar a:active {color: red}
-.navbar a:hover {color: red}
-
-ul { list-style-type: square; }
-ul ul { list-style-type: disc; }
-ul ul ul { list-style-type: circle; }
-ul ul ul ul { list-style-type: disc; }
-li { margin-left: 2em; margin-top: 0.5em; }
-li li { font-size: 85%; font-style: italic }
-li li li { font-size: 85%; font-style: normal }
-
-div dt
-{
- margin-left: 0;
- margin-top: 1em;
- margin-bottom: 0.5em;
- font-weight: bold;
-}
-div dd
-{
- margin-left: 2em;
- margin-bottom: 0.5em;
-}
-
-
-p,pre,ul,ol,blockquote,h2,h3,h4,h5,h6,dl,table {
- margin-left: 1em;
- margin-right: 1em;
-}
-
-p.subhead { font-weight: bold; margin-top: 2em; }
-
-p.smaller { font-size: smaller }
-
-td,th { padding: 0.2em }
-
-ul {
- margin: 0.5em 1.5em 0.5em 1.5em;
- padding: 0;
-}
-
-ol {
- margin: 0.5em 1.5em 0.5em 1.5em;
- padding: 0;
-}
-
-ul { list-style-type: square; }
-ul ul { list-style-type: disc; }
-ul ul ul { list-style-type: circle; }
-ul ul ul ul { list-style-type: disc; }
-
-ul li {
- list-style: square;
- //margin: 0.1em 0em 0.6em 0;
- padding: 0 0 0 0;
- line-height: 140%;
-}
-
-ol li {
- margin: 0.1em 0em 0.6em 1.5em;
- padding: 0 0 0 0px;
- line-height: 140%;
- list-style-type: decimal;
-}
-
-li ul li {
- font-size: 85%;
- font-style: italic;
- list-style-type: disc;
- background: transparent;
- padding: 0 0 0 0;
-}
-li li ul li {
- font-size: 85%;
- font-style: normal;
- list-style-type: circle;
- background: transparent;
- padding: 0 0 0 0;
-}
-li li li ul li {
- list-style-type: disc;
- background: transparent;
- padding: 0 0 0 0;
-}
-
-li ol li {
- list-style-type: decimal;
-}
-
-
-li li ol li {
- list-style-type: decimal;
-}
-
-/*
- setting class="outline on ol or ul makes it behave as an
- ouline list where blocklevel content in li elements is
- hidden by default and can be expanded or collapsed with
- mouse click. Set class="expand" on li to override default
-*/
-
-ol.outline li:hover { cursor: pointer }
-ol.outline li.nofold:hover { cursor: default }
-
-ul.outline li:hover { cursor: pointer }
-ul.outline li.nofold:hover { cursor: default }
-
-ol.outline { list-style:decimal; }
-ol.outline ol { list-style-type:lower-alpha }
-
-/* for slides with class "title" in table of contents */
-a.titleslide { font-weight: bold; font-style: italic }
diff --git a/doc/talks/slidy.js b/doc/talks/slidy.js
deleted file mode 100644
index 6a5561a6c1b..00000000000
--- a/doc/talks/slidy.js
+++ /dev/null
@@ -1,2772 +0,0 @@
-/* http://www.w3.org/Talks/Tools/Slidy/slidy.js
-
- Copyright (c) 2005 W3C (MIT, ERCIM, Keio), All Rights Reserved.
- W3C liability, trademark, document use and software licensing
- rules apply, see:
-
- http://www.w3.org/Consortium/Legal/copyright-documents
- http://www.w3.org/Consortium/Legal/copyright-software
-*/
-
-var ns_pos = (typeof window.pageYOffset!='undefined');
-var khtml = ((navigator.userAgent).indexOf("KHTML") >= 0 ? true : false);
-var opera = ((navigator.userAgent).indexOf("Opera") >= 0 ? true : false);
-var ie7 = (!ns_pos && navigator.userAgent.indexOf("MSIE 7") != -1);
-
-window.onload = startup; // equivalent to onload on body element
-
-// IE only event handlers to ensure all slides are printed
-// I don't yet know how to emulate these for other browsers
-window.onbeforeprint = beforePrint;
-window.onafterprint = afterPrint;
-
-// hack to hide slides while loading
-setTimeout(hideAll, 50);
-
-function hideAll()
-{
- if (document.body)
- document.body.style.visibility = "hidden";
- else
- setTimeout(hideAll, 50);
-}
-
-var slidenum = 0; // integer slide count: 0, 1, 2, ...
-var slides; // set to array of slide div's
-var slideNumElement; // element containing slide number
-var notes; // set to array of handout div's
-var backgrounds; // set to array of background div's
-var toolbar; // element containing toolbar
-var title; // document title
-var lastShown = null; // last incrementally shown item
-var eos = null; // span element for end of slide indicator
-var toc = null; // table of contents
-var outline = null; // outline element with the focus
-var selectedTextLen; // length of drag selection on document
-
-var viewAll = 0; // 1 to view all slides + handouts
-var wantToolbar = 1; // 0 if toolbar isn't wanted
-var mouseClickEnabled = true; // enables left click for next slide
-var scrollhack = 0; // IE work around for position: fixed
-
-var helpAnchor; // used for keyboard focus hack in showToolbar()
-var helpPage = "http://www.w3.org/Talks/Tools/Slidy/help.html";
-var helpText = "Navigate with mouse click, space bar, Cursor Left/Right, " +
- "or Pg Up and Pg Dn. Use S and B to change font size.";
-
-var sizeIndex = 0;
-var sizeAdjustment = 0;
-var sizes = new Array("10pt", "12pt", "14pt", "16pt", "18pt", "20pt",
- "22pt", "24pt", "26pt", "28pt", "30pt", "32pt");
-
-var okayForIncremental = incrementalElementList();
-
-// needed for efficient resizing
-var lastWidth = 0;
-var lastHeight = 0;
-
-// Needed for cross browser support for relative width/height on
-// object elements. The work around is to save width/height attributes
-// and then to recompute absolute width/height dimensions on resizing
-var objects;
-
-// updated to language specified by html file
-var lang = "en";
-
-//var localize = {};
-
-// for each language there is an associative array
-var strings_es = {
- "slide":"pág.",
- "help?":"Ayuda",
- "contents?":"Índice",
- "table of contents":"tabla de contenidos",
- "Table of Contents":"Tabla de Contenidos",
- "restart presentation":"Reiniciar presentación",
- "restart?":"Inicio"
- };
-
-strings_es[helpText] =
- "Utilice el ratón, barra espaciadora, teclas Izda/Dhca, " +
- "o Re pág y Av pág. Use S y B para cambiar el tamaño de fuente.";
-
-var strings_nl = {
- "slide":"pagina",
- "help?":"Help?",
- "contents?":"Inhoud?",
- "table of contents":"inhoudsopgave",
- "Table of Contents":"Inhoudsopgave",
- "restart presentation":"herstart presentatie",
- "restart?":"Herstart?"
- };
-
-strings_nl[helpText] =
- "Navigeer d.m.v. het muis, spatiebar, Links/Rechts toetsen, " +
- "of PgUp en PgDn. Gebruik S en B om de karaktergrootte te veranderen.";
-
-var strings_de = {
- "slide":"Seite",
- "help?":"Hilfe",
- "contents?":"Übersicht",
- "table of contents":"Inhaltsverzeichnis",
- "Table of Contents":"Inhaltsverzeichnis",
- "restart presentation":"Präsentation neu starten",
- "restart?":"Neustart"
- };
-
-strings_de[helpText] =
- "Benutzen Sie die Maus, Leerschlag, die Cursortasten links/rechts" +
- "oder Page up/Page Down zum Wechseln der Seiten und S und B für die Schriftgrösse.";
-
-var strings_pl = {
- "slide":"slajd",
- "help?":"pomoc?",
- "contents?":"spis treści?",
- "table of contents":"spis treści",
- "Table of Contents":"Spis Treści",
- "restart presentation":"Restartuj prezentację",
- "restart?":"restart?"
- };
-
-strings_pl[helpText] =
- "Zmieniaj slajdy klikając myszą, naciskając spację, strzałki lewo/prawo" +
- "lub PgUp / PgDn. Użyj klawiszy S i B, aby zmienić rozmiar czczionki.";
-
-var strings_fr = {
- "slide":"page",
- "help?":"Aide",
- "contents?":"Index",
- "table of contents":"table des matières",
- "Table of Contents":"Table des matières",
- "restart presentation":"Recommencer l'exposé",
- "restart?":"Début"
- };
-
-strings_fr[helpText] =
- "Naviguez avec la souris, la barre d'espace, les flèches" +
- "gauche/droite ou les touches Pg Up, Pg Dn. Utilisez " +
- "les touches S et B pour modifier la taille de la police.";
-
-var strings_hu = {
- "slide":"oldal",
- "help?":"segítség",
- "contents?":"tartalom",
- "table of contents":"tartalomjegyzék",
- "Table of Contents":"Tartalomjegyzék",
- "restart presentation":"bemutató újraindítása",
- "restart?":"újraindítás"
- };
-
-strings_hu[helpText] =
- "Az oldalak közti lépkedéshez kattintson az egérrel, vagy használja a szóköz, a bal, vagy a jobb nyíl, " +
- "illetve a Page Down, Page Up billentyűket. Az S és a B billentyűkkel változtathatja a szöveg méretét.";
-
-var strings_it = {
- "slide":"pag.",
- "help?":"Aiuto",
- "contents?":"Indice",
- "table of contents":"indice",
- "Table of Contents":"Indice",
- "restart presentation":"Ricominciare la presentazione",
- "restart?":"Inizio"
- };
-
-strings_it[helpText] =
- "Navigare con mouse, barra spazio, frecce sinistra/destra o " +
- "PgUp e PgDn. Usare S e B per cambiare la dimensione dei caratteri.";
-
-var strings_el = {
- "slide":"σελίδα",
- "help?":"βοήθεια;",
- "contents?":"περιεχόμενα;",
- "table of contents":"πίνακας περιεχομένων",
- "Table of Contents":"Πίνακας Περιεχομένων",
- "restart presentation":"επανεκκίνηση παρουσίασης",
- "restart?":"επανεκκίνηση;"
- };
-
-strings_el[helpText] =
- "Πλοηγηθείτε με το κλίκ του ποντικιού, το space, τα βέλη αριστερά/δεξιά, " +
- "ή Page Up και Page Down. Χρησιμοποιήστε τα πλήκτρα S και B για να αλλάξετε " +
- "το μέγεθος της γραμματοσειράς.";
-
-var strings_ja = {
- "slide":"スライド",
- "help?":"ヘルプ",
- "contents?":"目次",
- "table of contents":"目次を表示",
- "Table of Contents":"目次",
- "restart presentation":"最初から再生",
- "restart?":"最初から"
-};
-
-strings_ja[helpText] =
- "マウス左クリック ・ スペース ・ 左右キー " +
- "または Page Up ・ Page Downで操作， S ・ Bでフォントサイズ変更";
-
-
-// each such language array is declared in the localize array
-// used indirectly as in help.innerHTML = "help".localize();
-var localize = {
- "es":strings_es,
- "nl":strings_nl,
- "de":strings_de,
- "pl":strings_pl,
- "fr":strings_fr,
- "hu":strings_hu,
- "it":strings_it,
- "el":strings_el,
- "jp":strings_ja
- };
-
-/* general initialization */
-function startup()
-{
- // find human language from html element
- // for use in localizing strings
- lang = document.body.parentNode.getAttribute("lang");
-
- if (!lang)
- lang = document.body.parentNode.getAttribute("xml:lang");
-
- if (!lang)
- lang = "en";
-
- document.body.style.visibility = "visible";
- title = document.title;
- toolbar = addToolbar();
- wrapImplicitSlides();
- slides = collectSlides();
- notes = collectNotes();
- objects = document.body.getElementsByTagName("object");
- backgrounds = collectBackgrounds();
- patchAnchors();
-
- slidenum = findSlideNumber(location.href);
- window.offscreenbuffering = true;
- sizeAdjustment = findSizeAdjust();
- hideImageToolbar(); // suppress IE image toolbar popup
- initOutliner(); // activate fold/unfold support
-
- if (slides.length > 0)
- {
- var slide = slides[slidenum];
- slide.style.position = "absolute";
-
- if (slidenum > 0)
- {
- setVisibilityAllIncremental("visible");
- lastShown = previousIncrementalItem(null);
- setEosStatus(true);
- }
- else
- {
- lastShown = null;
- setVisibilityAllIncremental("hidden");
- setEosStatus(!nextIncrementalItem(lastShown));
- }
-
- setLocation();
- }
-
- toc = tableOfContents();
- hideTableOfContents();
-
- // bind event handlers
- document.onclick = mouseButtonClick;
- document.onmouseup = mouseButtonUp;
- document.onkeydown = keyDown;
- window.onresize = resized;
- window.onscroll = scrolled;
- singleSlideView();
-
- setLocation();
- resized();
-
- if (ie7)
- setTimeout("ieHack()", 100);
-
- showToolbar();
-}
-
-// add localize method to all strings for use
-// as in help.innerHTML = "help".localize();
-String.prototype.localize = function()
-{
- if (this == "")
- return this;
-
- // try full language code, e.g. en-US
- var s, lookup = localize[lang];
-
- if (lookup)
- {
- s = lookup[this];
-
- if (s)
- return s;
- }
-
- // try en if undefined for en-US
- var lg = lang.split("-");
-
- if (lg.length > 1)
- {
- lookup = localize[lg[0]];
-
- if (lookup)
- {
- s = lookup[this];
-
- if (s)
- return s;
- }
- }
-
- // otherwise string as is
- return this;
-}
-
-// suppress IE's image toolbar pop up
-function hideImageToolbar()
-{
- if (!ns_pos)
- {
- var images = document.getElementsByTagName("IMG");
-
- for (var i = 0; i < images.length; ++i)
- images[i].setAttribute("galleryimg", "no");
- }
-}
-
-// hack to persuade IE to compute correct document height
-// as needed for simulating fixed positioning of toolbar
-function ieHack()
-{
- window.resizeBy(0,-1);
- window.resizeBy(0, 1);
-}
-
-// Firefox reload SVG bug work around
-function reload(e)
-{
- if (!e)
- var e = window.event;
-
- hideBackgrounds();
- setTimeout("document.reload();", 100);
-
- stopPropagation(e);
- e.cancel = true;
- e.returnValue = false;
-
- return false;
-}
-
-// Safari and Konqueror don't yet support getComputedStyle()
-// and they always reload page when location.href is updated
-function isKHTML()
-{
- var agent = navigator.userAgent;
- return (agent.indexOf("KHTML") >= 0 ? true : false);
-}
-
-function resized()
-{
- var width = 0;
-
- if ( typeof( window.innerWidth ) == 'number' )
- width = window.innerWidth; // Non IE browser
- else if (document.documentElement && document.documentElement.clientWidth)
- width = document.documentElement.clientWidth; // IE6
- else if (document.body && document.body.clientWidth)
- width = document.body.clientWidth; // IE4
-
- var height = 0;
-
- if ( typeof( window.innerHeight ) == 'number' )
- height = window.innerHeight; // Non IE browser
- else if (document.documentElement && document.documentElement.clientHeight)
- height = document.documentElement.clientHeight; // IE6
- else if (document.body && document.body.clientHeight)
- height = document.body.clientHeight; // IE4
-
- if (height && (width/height > 1.05*1024/768))
- {
- width = height * 1024.0/768;
- }
-
- // IE fires onresize even when only font size is changed!
- // so we do a check to avoid blocking < and > actions
- if (width != lastWidth || height != lastHeight)
- {
- if (width >= 1100)
- sizeIndex = 5; // 4
- else if (width >= 1000)
- sizeIndex = 4; // 3
- else if (width >= 800)
- sizeIndex = 3; // 2
- else if (width >= 600)
- sizeIndex = 2; // 1
- else if (width)
- sizeIndex = 0;
-
- // add in font size adjustment from meta element e.g.
- //
- // useful when slides have too much content ;-)
-
- if (0 <= sizeIndex + sizeAdjustment &&
- sizeIndex + sizeAdjustment < sizes.length)
- sizeIndex = sizeIndex + sizeAdjustment;
-
- // enables cross browser use of relative width/height
- // on object elements for use with SVG and Flash media
- adjustObjectDimensions(width, height);
-
- document.body.style.fontSize = sizes[sizeIndex];
-
- lastWidth = width;
- lastHeight = height;
-
- // force reflow to work around Mozilla bug
- //if (ns_pos)
- {
- var slide = slides[slidenum];
- hideSlide(slide);
- showSlide(slide);
- }
-
- // force correct positioning of toolbar
- refreshToolbar(200);
- }
-}
-
-function scrolled()
-{
- if (toolbar && !ns_pos && !ie7)
- {
- hackoffset = scrollXOffset();
- // hide toolbar
- toolbar.style.display = "none";
-
- // make it reappear later
- if (scrollhack == 0 && !viewAll)
- {
- setTimeout(showToolbar, 1000);
- scrollhack = 1;
- }
- }
-}
-
-// used to ensure IE refreshes toolbar in correct position
-function refreshToolbar(interval)
-{
- if (!ns_pos && !ie7)
- {
- hideToolbar();
- setTimeout(showToolbar, interval);
- }
-}
-
-// restores toolbar after short delay
-function showToolbar()
-{
- if (wantToolbar)
- {
- if (!ns_pos)
- {
- // adjust position to allow for scrolling
- var xoffset = scrollXOffset();
- toolbar.style.left = xoffset;
- toolbar.style.right = xoffset;
-
- // determine vertical scroll offset
- //var yoffset = scrollYOffset();
-
- // bottom is doc height - window height - scroll offset
- //var bottom = documentHeight() - lastHeight - yoffset
-
- //if (yoffset > 0 || documentHeight() > lastHeight)
- // bottom += 16; // allow for height of scrollbar
-
- toolbar.style.bottom = 0; //bottom;
- }
-
- toolbar.style.display = "block";
- toolbar.style.visibility = "visible";
- }
-
- scrollhack = 0;
-
-
- // set the keyboard focus to the help link on the
- // toolbar to ensure that document has the focus
- // IE doesn't always work with window.focus()
- // and this hack has benefit of Enter for help
-
- try
- {
- if (!opera)
- helpAnchor.focus();
- }
- catch (e)
- {
- }
-}
-
-function test()
-{
- var s = "docH: " + documentHeight() +
- " winH: " + lastHeight +
- " yoffset: " + scrollYOffset() +
- " toolbot: " + (documentHeight() - lastHeight - scrollYOffset());
-
- //alert(s);
-
- var slide = slides[slidenum];
- // IE getAttribute requires "class" to be "className"
- var name = ns_pos ? "class" : "className";
- var style = (slide.currentStyle ? slide.currentStyle["backgroundColor"] :
- document.defaultView.getComputedStyle(slide, '').getPropertyValue("background-color"));
- alert("class='" + slide.getAttribute(name) + "' backgroundColor: " + style);
-}
-
-function hideToolbar()
-{
- toolbar.style.display = "none";
- toolbar.style.visibility = "hidden";
- window.focus();
-}
-
-// invoked via F key
-function toggleToolbar()
-{
- if (!viewAll)
- {
- if (toolbar.style.display == "none")
- {
- toolbar.style.display = "block";
- toolbar.style.visibility = "visible";
- wantToolbar = 1;
- }
- else
- {
- toolbar.style.display = "none";
- toolbar.style.visibility = "hidden";
- wantToolbar = 0;
- }
- }
-}
-
-function scrollXOffset()
-{
- if (window.pageXOffset)
- return self.pageXOffset;
-
- if (document.documentElement &&
- document.documentElement.scrollLeft)
- return document.documentElement.scrollLeft;
-
- if (document.body)
- return document.body.scrollLeft;
-
- return 0;
-}
-
-
-function scrollYOffset()
-{
- if (window.pageYOffset)
- return self.pageYOffset;
-
- if (document.documentElement &&
- document.documentElement.scrollTop)
- return document.documentElement.scrollTop;
-
- if (document.body)
- return document.body.scrollTop;
-
- return 0;
-}
-
-// looking for a way to determine height of slide content
-// the slide itself is set to the height of the window
-function optimizeFontSize()
-{
- var slide = slides[slidenum];
-
- //var dh = documentHeight(); //getDocHeight(document);
- var dh = slide.scrollHeight;
- var wh = getWindowHeight();
- var u = 100 * dh / wh;
-
- alert("window utilization = " + u + "% (doc "
- + dh + " win " + wh + ")");
-}
-
-function getDocHeight(doc) // from document object
-{
- if (!doc)
- doc = document;
-
- if (doc && doc.body && doc.body.offsetHeight)
- return doc.body.offsetHeight; // ns/gecko syntax
-
- if (doc && doc.body && doc.body.scrollHeight)
- return doc.body.scrollHeight;
-
- alert("couldn't determine document height");
-}
-
-function getWindowHeight()
-{
- if ( typeof( window.innerHeight ) == 'number' )
- return window.innerHeight; // Non IE browser
-
- if (document.documentElement && document.documentElement.clientHeight)
- return document.documentElement.clientHeight; // IE6
-
- if (document.body && document.body.clientHeight)
- return document.body.clientHeight; // IE4
-}
-
-
-
-function documentHeight()
-{
- var sh, oh;
-
- sh = document.body.scrollHeight;
- oh = document.body.offsetHeight;
-
- if (sh && oh)
- {
- return (sh > oh ? sh : oh);
- }
-
- // no idea!
- return 0;
-}
-
-function smaller()
-{
- if (sizeIndex > 0)
- {
- --sizeIndex;
- }
-
- toolbar.style.display = "none";
- document.body.style.fontSize = sizes[sizeIndex];
- var slide = slides[slidenum];
- hideSlide(slide);
- showSlide(slide);
- setTimeout(showToolbar, 300);
-}
-
-function bigger()
-{
- if (sizeIndex < sizes.length - 1)
- {
- ++sizeIndex;
- }
-
- toolbar.style.display = "none";
- document.body.style.fontSize = sizes[sizeIndex];
- var slide = slides[slidenum];
- hideSlide(slide);
- showSlide(slide);
- setTimeout(showToolbar, 300);
-}
-
-// enables cross browser use of relative width/height
-// on object elements for use with SVG and Flash media
-// with thanks to Ivan Herman for the suggestion
-function adjustObjectDimensions(width, height)
-{
- for( var i = 0; i < objects.length; i++ )
- {
- var obj = objects[i];
- var mimeType = obj.getAttribute("type");
-
- if (mimeType == "image/svg+xml" || mimeType == "application/x-shockwave-flash")
- {
- if ( !obj.initialWidth )
- obj.initialWidth = obj.getAttribute("width");
-
- if ( !obj.initialHeight )
- obj.initialHeight = obj.getAttribute("height");
-
- if ( obj.initialWidth && obj.initialWidth.charAt(obj.initialWidth.length-1) == "%" )
- {
- var w = parseInt(obj.initialWidth.slice(0, obj.initialWidth.length-1));
- var newW = width * (w/100.0);
- obj.setAttribute("width",newW);
- }
-
- if ( obj.initialHeight && obj.initialHeight.charAt(obj.initialHeight.length-1) == "%" )
- {
- var h = parseInt(obj.initialHeight.slice(0, obj.initialHeight.length-1));
- var newH = height * (h/100.0);
- obj.setAttribute("height", newH);
- }
- }
- }
-}
-
-function cancel(event)
-{
- if (event)
- {
- event.cancel = true;
- event.returnValue = false;
-
- if (event.preventDefault)
- event.preventDefault();
- }
-
- return false;
-}
-
-// See e.g. http://www.quirksmode.org/js/events/keys.html for keycodes
-function keyDown(event)
-{
- var key;
-
- if (!event)
- var event = window.event;
-
- // kludge around NS/IE differences
- if (window.event)
- key = window.event.keyCode;
- else if (event.which)
- key = event.which;
- else
- return true; // Yikes! unknown browser
-
- // ignore event if key value is zero
- // as for alt on Opera and Konqueror
- if (!key)
- return true;
-
- // check for concurrent control/command/alt key
- // but are these only present on mouse events?
-
- if (event.ctrlKey || event.altKey || event.metaKey)
- return true;
-
- // dismiss table of contents if visible
- if (isShownToc() && key != 9 && key != 16 && key != 38 && key != 40)
- {
- hideTableOfContents();
-
- if (key == 27 || key == 84 || key == 67)
- return cancel(event);
- }
-
- if (key == 34) // Page Down
- {
- nextSlide(false);
- return cancel(event);
- }
- else if (key == 33) // Page Up
- {
- previousSlide(false);
- return cancel(event);
- }
- else if (key == 32) // space bar
- {
- nextSlide(true);
- return cancel(event);
- }
- else if (key == 37 || key == 38) // Left arrow || Up arrow
- {
- previousSlide(!event.shiftKey);
- return cancel(event);
- }
- else if (key == 36) // Home
- {
- firstSlide();
- return cancel(event);
- }
- else if (key == 35) // End
- {
- lastSlide();
- return cancel(event);
- }
- else if (key == 39 || key == 40) // Right arrow || Down arrow
- {
- nextSlide(!event.shiftKey);
- return cancel(event);
- }
- else if (key == 13) // Enter
- {
- if (outline)
- {
- if (outline.visible)
- fold(outline);
- else
- unfold(outline);
-
- return cancel(event);
- }
- }
- else if (key == 188) // < for smaller fonts
- {
- smaller();
- return cancel(event);
- }
- else if (key == 190) // > for larger fonts
- {
- bigger();
- return cancel(event);
- }
- else if (key == 189 || key == 109) // - for smaller fonts
- {
- smaller();
- return cancel(event);
- }
- else if (key == 187 || key == 191 || key == 107) // = + for larger fonts
- {
- bigger();
- return cancel(event);
- }
- else if (key == 83) // S for smaller fonts
- {
- smaller();
- return cancel(event);
- }
- else if (key == 66) // B for larger fonts
- {
- bigger();
- return cancel(event);
- }
- else if (key == 90) // Z for last slide
- {
- lastSlide();
- return cancel(event);
- }
- else if (key == 70) // F for toggle toolbar
- {
- toggleToolbar();
- return cancel(event);
- }
- else if (key == 65) // A for toggle view single/all slides
- {
- toggleView();
- return cancel(event);
- }
- else if (key == 75) // toggle action of left click for next page
- {
- mouseClickEnabled = !mouseClickEnabled;
- alert((mouseClickEnabled ? "enabled" : "disabled") + " mouse click advance");
- return cancel(event);
- }
- else if (key == 84 || key == 67) // T or C for table of contents
- {
- if (toc)
- showTableOfContents();
-
- return cancel(event);
- }
- else if (key == 72) // H for help
- {
- window.location = helpPage;
- return cancel(event);
- }
-
- //else if (key == 93) // Windows menu key
- //alert("lastShown is " + lastShown);
- //else alert("key code is "+ key);
-
-
- return true;
-}
-
-// make note of length of selected text
-// as this evaluates to zero in click event
-function mouseButtonUp(e)
-{
- selectedTextLen = getSelectedText().length;
-}
-
-// right mouse button click is reserved for context menus
-// it is more reliable to detect rightclick than leftclick
-function mouseButtonClick(e)
-{
- var rightclick = false;
- var leftclick = false;
- var middleclick = false;
- var target;
-
- if (!e)
- var e = window.event;
-
- if (e.target)
- target = e.target;
- else if (e.srcElement)
- target = e.srcElement;
-
- // work around Safari bug
- if (target.nodeType == 3)
- target = target.parentNode;
-
- if (e.which) // all browsers except IE
- {
- leftclick = (e.which == 1);
- middleclick = (e.which == 2);
- rightclick = (e.which == 3);
- }
- else if (e.button)
- {
- // Konqueror gives 1 for left, 4 for middle
- // IE6 gives 0 for left and not 1 as I expected
-
- if (e.button == 4)
- middleclick = true;
-
- // all browsers agree on 2 for right button
- rightclick = (e.button == 2);
- }
- else leftclick = true;
-
- // dismiss table of contents
- hideTableOfContents();
-
- if (selectedTextLen > 0)
- {
- stopPropagation(e);
- e.cancel = true;
- e.returnValue = false;
- return false;
- }
-
- // check if target is something that probably want's clicks
- // e.g. embed, object, input, textarea, select, option
-
- if (mouseClickEnabled && leftclick &&
- target.nodeName != "EMBED" &&
- target.nodeName != "OBJECT" &&
- target.nodeName != "INPUT" &&
- target.nodeName != "TEXTAREA" &&
- target.nodeName != "SELECT" &&
- target.nodeName != "OPTION")
- {
- nextSlide(true);
- stopPropagation(e);
- e.cancel = true;
- e.returnValue = false;
- }
-}
-
-function previousSlide(incremental)
-{
- if (!viewAll)
- {
- var slide;
-
- if ((incremental || slidenum == 0) && lastShown != null)
- {
- lastShown = hidePreviousItem(lastShown);
- setEosStatus(false);
- }
- else if (slidenum > 0)
- {
- slide = slides[slidenum];
- hideSlide(slide);
-
- slidenum = slidenum - 1;
- slide = slides[slidenum];
- setVisibilityAllIncremental("visible");
- lastShown = previousIncrementalItem(null);
- setEosStatus(true);
- showSlide(slide);
- }
-
- setLocation();
-
- if (!ns_pos)
- refreshToolbar(200);
- }
-}
-
-function nextSlide(incremental)
-{
- if (!viewAll)
- {
- var slide, last = lastShown;
-
- if (incremental || slidenum == slides.length - 1)
- lastShown = revealNextItem(lastShown);
-
- if ((!incremental || lastShown == null) && slidenum < slides.length - 1)
- {
- slide = slides[slidenum];
- hideSlide(slide);
-
- slidenum = slidenum + 1;
- slide = slides[slidenum];
- lastShown = null;
- setVisibilityAllIncremental("hidden");
- showSlide(slide);
- }
- else if (!lastShown)
- {
- if (last && incremental)
- lastShown = last;
- }
-
- setLocation();
-
- setEosStatus(!nextIncrementalItem(lastShown));
-
- if (!ns_pos)
- refreshToolbar(200);
- }
-}
-
-// to first slide with nothing revealed
-// i.e. state at start of presentation
-function firstSlide()
-{
- if (!viewAll)
- {
- var slide;
-
- if (slidenum != 0)
- {
- slide = slides[slidenum];
- hideSlide(slide);
-
- slidenum = 0;
- slide = slides[slidenum];
- lastShown = null;
- setVisibilityAllIncremental("hidden");
- showSlide(slide);
- }
-
- setEosStatus(!nextIncrementalItem(lastShown));
- setLocation();
- }
-}
-
-
-// to last slide with everything revealed
-// i.e. state at end of presentation
-function lastSlide()
-{
- if (!viewAll)
- {
- var slide;
-
- lastShown = null; //revealNextItem(lastShown);
-
- if (lastShown == null && slidenum < slides.length - 1)
- {
- slide = slides[slidenum];
- hideSlide(slide);
- slidenum = slides.length - 1;
- slide = slides[slidenum];
- setVisibilityAllIncremental("visible");
- lastShown = previousIncrementalItem(null);
-
- showSlide(slide);
- }
- else
- {
- setVisibilityAllIncremental("visible");
- lastShown = previousIncrementalItem(null);
- }
-
- setEosStatus(true);
- setLocation();
- }
-}
-
-function setEosStatus(state)
-{
- if (eos)
- eos.style.color = (state ? "rgb(240,240,240)" : "red");
-}
-
-function showSlide(slide)
-{
- syncBackground(slide);
- window.scrollTo(0,0);
- slide.style.visibility = "visible";
- slide.style.display = "block";
-}
-
-function hideSlide(slide)
-{
- slide.style.visibility = "hidden";
- slide.style.display = "none";
-}
-
-function beforePrint()
-{
- showAllSlides();
- hideToolbar();
-}
-
-function afterPrint()
-{
- if (!viewAll)
- {
- singleSlideView();
- showToolbar();
- }
-}
-
-function printSlides()
-{
- beforePrint();
- window.print();
- afterPrint();
-}
-
-function toggleView()
-{
- if (viewAll)
- {
- singleSlideView();
- showToolbar();
- viewAll = 0;
- }
- else
- {
- showAllSlides();
- hideToolbar();
- viewAll = 1;
- }
-}
-
-// prepare for printing
-function showAllSlides()
-{
- var slide;
-
- for (var i = 0; i < slides.length; ++i)
- {
- slide = slides[i];
-
- slide.style.position = "relative";
- slide.style.borderTopStyle = "solid";
- slide.style.borderTopWidth = "thin";
- slide.style.borderTopColor = "black";
-
- try {
- if (i == 0)
- slide.style.pageBreakBefore = "avoid";
- else
- slide.style.pageBreakBefore = "always";
- }
- catch (e)
- {
- //do nothing
- }
-
- setVisibilityAllIncremental("visible");
- showSlide(slide);
- }
-
- var note;
-
- for (var i = 0; i < notes.length; ++i)
- {
- showSlide(notes[i]);
- }
-
- // no easy way to render background under each slide
- // without duplicating the background divs for each slide
- // therefore hide backgrounds to avoid messing up slides
- hideBackgrounds();
-}
-
-// restore after printing
-function singleSlideView()
-{
- var slide;
-
- for (var i = 0; i < slides.length; ++i)
- {
- slide = slides[i];
-
- slide.style.position = "absolute";
-
- if (i == slidenum)
- {
- slide.style.borderStyle = "none";
- showSlide(slide);
- }
- else
- {
- slide.style.borderStyle = "none";
- hideSlide(slide);
- }
- }
-
- setVisibilityAllIncremental("visible");
- lastShown = previousIncrementalItem(null);
-
- var note;
-
- for (var i = 0; i < notes.length; ++i)
- {
- hideSlide(notes[i]);
- }
-}
-
-// the string str is a whitespace separated list of tokens
-// test if str contains a particular token, e.g. "slide"
-function hasToken(str, token)
-{
- if (str)
- {
- // define pattern as regular expression
- var pattern = /\w+/g;
-
- // check for matches
- // place result in array
- var result = str.match(pattern);
-
- // now check if desired token is present
- for (var i = 0; i < result.length; i++)
- {
- if (result[i] == token)
- return true;
- }
- }
-
- return false;
-}
-
-function getClassList(element)
-{
- if (typeof window.pageYOffset =='undefined')
- return element.getAttribute("className");
-
- return element.getAttribute("class");
-}
-
-function hasClass(element, name)
-{
- var regexp = new RegExp("(^| )" + name + "\W*");
-
- if (regexp.test(getClassList(element)))
- return true;
-
- return false;
-
-}
-
-function removeClass(element, name)
-{
- // IE getAttribute requires "class" to be "className"
- var clsname = ns_pos ? "class" : "className";
- var clsval = element.getAttribute(clsname);
-
- var regexp = new RegExp("(^| )" + name + "\W*");
-
- if (clsval)
- {
- clsval = clsval.replace(regexp, "");
- element.setAttribute(clsname, clsval);
- }
-}
-
-function addClass(element, name)
-{
- if (!hasClass(element, name))
- {
- // IE getAttribute requires "class" to be "className"
- var clsname = ns_pos ? "class" : "className";
- var clsval = element.getAttribute(clsname);
- element.setAttribute(clsname, (clsval ? clsval + " " + name : name));
- }
-}
-
-// wysiwyg editors make it hard to use div elements
-// e.g. amaya loses the div when you copy and paste
-// this function wraps div elements around implicit
-// slides which start with an h1 element and continue
-// up to the next heading or div element
-function wrapImplicitSlides()
-{
- var i, heading, node, next, div;
- var headings = document.getElementsByTagName("h1");
-
- if (!headings)
- return;
-
- for (i = 0; i < headings.length; ++i)
- {
- heading = headings[i];
-
- if (heading.parentNode != document.body)
- continue;
-
- node = heading.nextSibling;
-
- div = document.createElement("div");
- div.setAttribute((ns_pos ? "class" : "className"), "slide");
- document.body.replaceChild(div, heading);
- div.appendChild(heading);
-
- while (node)
- {
- if (node.nodeType == 1 && // an element
- (node.nodeName == "H1" ||
- node.nodeName == "h1" ||
- node.nodeName == "DIV" ||
- node.nodeName == "div"))
- break;
-
- next = node.nextSibling;
- node = document.body.removeChild(node);
- div.appendChild(node);
- node = next;
- }
- }
-}
-
-// return new array of all slides
-function collectSlides()
-{
- var slides = new Array();
- var divs = document.body.getElementsByTagName("div");
-
- for (var i = 0; i < divs.length; ++i)
- {
- div = divs.item(i);
-
- if (hasClass(div, "slide"))
- {
- // add slide to collection
- slides[slides.length] = div;
-
- // hide each slide as it is found
- div.style.display = "none";
- div.style.visibility = "hidden";
-
- // add dummy at end for scrolling hack
- var node1 = document.createElement("br");
- div.appendChild(node1);
- var node2 = document.createElement("br");
- div.appendChild(node2);
- }
- else if (hasClass(div, "background"))
- { // work around for Firefox SVG reload bug
- // which otherwise replaces 1st SVG graphic with 2nd
- div.style.display = "block";
- }
- }
-
- return slides;
-}
-
-// return new array of all
-function collectNotes()
-{
- var notes = new Array();
- var divs = document.body.getElementsByTagName("div");
-
- for (var i = 0; i < divs.length; ++i)
- {
- div = divs.item(i);
-
- if (hasClass(div, "handout"))
- {
- // add slide to collection
- notes[notes.length] = div;
-
- // hide handout notes as they are found
- div.style.display = "none";
- div.style.visibility = "hidden";
- }
- }
-
- return notes;
-}
-
-// return new array of all
-// including named backgrounds e.g. class="background titlepage"
-function collectBackgrounds()
-{
- var backgrounds = new Array();
- var divs = document.body.getElementsByTagName("div");
-
- for (var i = 0; i < divs.length; ++i)
- {
- div = divs.item(i);
-
- if (hasClass(div, "background"))
- {
- // add slide to collection
- backgrounds[backgrounds.length] = div;
-
- // hide named backgrounds as they are found
- // e.g. class="background epilog"
- if (getClassList(div) != "background")
- {
- div.style.display = "none";
- div.style.visibility = "hidden";
- }
- }
- }
-
- return backgrounds;
-}
-
-// show just the backgrounds pertinent to this slide
-function syncBackground(slide)
-{
- var background;
- var bgColor;
-
- if (slide.currentStyle)
- bgColor = slide.currentStyle["backgroundColor"];
- else if (document.defaultView)
- {
- var styles = document.defaultView.getComputedStyle(slide,null);
-
- if (styles)
- bgColor = styles.getPropertyValue("background-color");
- else // broken implementation probably due Safari or Konqueror
- {
- //alert("defective implementation of getComputedStyle()");
- bgColor = "transparent";
- }
- }
- else
- bgColor == "transparent";
-
- if (bgColor == "transparent")
- {
- var slideClass = getClassList(slide);
-
- for (var i = 0; i < backgrounds.length; i++)
- {
- background = backgrounds[i];
-
- var bgClass = getClassList(background);
-
- if (matchingBackground(slideClass, bgClass))
- {
- background.style.display = "block";
- background.style.visibility = "visible";
- }
- else
- {
- background.style.display = "none";
- background.style.visibility = "hidden";
- }
- }
- }
- else // forcibly hide all backgrounds
- hideBackgrounds();
-}
-
-function hideBackgrounds()
-{
- for (var i = 0; i < backgrounds.length; i++)
- {
- background = backgrounds[i];
- background.style.display = "none";
- background.style.visibility = "hidden";
- }
-}
-
-// compare classes for slide and background
-function matchingBackground(slideClass, bgClass)
-{
- if (bgClass == "background")
- return true;
-
- // define pattern as regular expression
- var pattern = /\w+/g;
-
- // check for matches and place result in array
- var result = slideClass.match(pattern);
-
- // now check if desired name is present for background
- for (var i = 0; i < result.length; i++)
- {
- if (hasToken(bgClass, result[i]))
- return true;
- }
-
- return false;
-}
-
-// left to right traversal of root's content
-function nextNode(root, node)
-{
- if (node == null)
- return root.firstChild;
-
- if (node.firstChild)
- return node.firstChild;
-
- if (node.nextSibling)
- return node.nextSibling;
-
- for (;;)
- {
- node = node.parentNode;
-
- if (!node || node == root)
- break;
-
- if (node && node.nextSibling)
- return node.nextSibling;
- }
-
- return null;
-}
-
-// right to left traversal of root's content
-function previousNode(root, node)
-{
- if (node == null)
- {
- node = root.lastChild;
-
- if (node)
- {
- while (node.lastChild)
- node = node.lastChild;
- }
-
- return node;
- }
-
- if (node.previousSibling)
- {
- node = node.previousSibling;
-
- while (node.lastChild)
- node = node.lastChild;
-
- return node;
- }
-
- if (node.parentNode != root)
- return node.parentNode;
-
- return null;
-}
-
-// HTML elements that can be used with class="incremental"
-// note that you can also put the class on containers like
-// up, ol, dl, and div to make their contents appear
-// incrementally. Upper case is used since this is what
-// browsers report for HTML node names (text/html).
-function incrementalElementList()
-{
- var inclist = new Array();
- inclist["P"] = true;
- inclist["PRE"] = true;
- inclist["LI"] = true;
- inclist["BLOCKQUOTE"] = true;
- inclist["DT"] = true;
- inclist["DD"] = true;
- inclist["H2"] = true;
- inclist["H3"] = true;
- inclist["H4"] = true;
- inclist["H5"] = true;
- inclist["H6"] = true;
- inclist["SPAN"] = true;
- inclist["ADDRESS"] = true;
- inclist["TABLE"] = true;
- inclist["TR"] = true;
- inclist["TH"] = true;
- inclist["TD"] = true;
- inclist["IMG"] = true;
- inclist["OBJECT"] = true;
- return inclist;
-}
-
-function nextIncrementalItem(node)
-{
- var slide = slides[slidenum];
-
- for (;;)
- {
- node = nextNode(slide, node);
-
- if (node == null || node.parentNode == null)
- break;
-
- if (node.nodeType == 1) // ELEMENT
- {
- if (node.nodeName == "BR")
- continue;
-
- if (hasClass(node, "incremental")
- && okayForIncremental[node.nodeName])
- return node;
-
- if (hasClass(node.parentNode, "incremental")
- && !hasClass(node, "non-incremental"))
- return node;
- }
- }
-
- return node;
-}
-
-function previousIncrementalItem(node)
-{
- var slide = slides[slidenum];
-
- for (;;)
- {
- node = previousNode(slide, node);
-
- if (node == null || node.parentNode == null)
- break;
-
- if (node.nodeType == 1)
- {
- if (node.nodeName == "BR")
- continue;
-
- if (hasClass(node, "incremental")
- && okayForIncremental[node.nodeName])
- return node;
-
- if (hasClass(node.parentNode, "incremental")
- && !hasClass(node, "non-incremental"))
- return node;
- }
- }
-
- return node;
-}
-
-// set visibility for all elements on current slide with
-// a parent element with attribute class="incremental"
-function setVisibilityAllIncremental(value)
-{
- var node = nextIncrementalItem(null);
-
- while (node)
- {
- node.style.visibility = value;
- node = nextIncrementalItem(node);
- }
-}
-
-// reveal the next hidden item on the slide
-// node is null or the node that was last revealed
-function revealNextItem(node)
-{
- node = nextIncrementalItem(node);
-
- if (node && node.nodeType == 1) // an element
- node.style.visibility = "visible";
-
- return node;
-}
-
-
-// exact inverse of revealNextItem(node)
-function hidePreviousItem(node)
-{
- if (node && node.nodeType == 1) // an element
- node.style.visibility = "hidden";
-
- return previousIncrementalItem(node);
-}
-
-
-/* set click handlers on all anchors */
-function patchAnchors()
-{
- var anchors = document.body.getElementsByTagName("a");
-
- for (var i = 0; i < anchors.length; ++i)
- {
- anchors[i].onclick = clickedAnchor;
- }
-}
-
-function clickedAnchor(e)
-{
- if (!e)
- var e = window.event;
-
- // compare this.href with location.href
- // for link to another slide in this doc
-
- if (pageAddress(this.href) == pageAddress(location.href))
- {
- // yes, so find new slide number
- var newslidenum = findSlideNumber(this.href);
-
- if (newslidenum != slidenum)
- {
- slide = slides[slidenum];
- hideSlide(slide);
- slidenum = newslidenum;
- slide = slides[slidenum];
- showSlide(slide);
- setLocation();
- }
- }
- else if (this.target == null)
- location.href = this.href;
-
- this.blur();
- stopPropagation(e);
-}
-
-function pageAddress(uri)
-{
- var i = uri.indexOf("#");
-
- // check if anchor is entire page
-
- if (i < 0)
- return uri; // yes
-
- return uri.substr(0, i);
-}
-
-function showSlideNumber()
-{
- slideNumElement.innerHTML = "slide".localize() + " " +
- (slidenum + 1) + "/" + slides.length;
-}
-
-function setLocation()
-{
- var uri = pageAddress(location.href);
-
- //if (slidenum > 0)
- uri = uri + "#(" + (slidenum+1) + ")";
-
- if (uri != location.href && !khtml)
- location.href = uri;
-
- document.title = title + " (" + (slidenum+1) + ")";
- //document.title = (slidenum+1) + ") " + slideName(slidenum);
-
- showSlideNumber();
-}
-
-// find current slide based upon location
-// first find target anchor and then look
-// for associated div element enclosing it
-// finally map that to slide number
-function findSlideNumber(uri)
-{
- // first get anchor from page location
-
- var i = uri.indexOf("#");
-
- // check if anchor is entire page
-
- if (i < 0)
- return 0; // yes
-
- var anchor = unescape(uri.substr(i+1));
-
- // now use anchor as XML ID to find target
- var target = document.getElementById(anchor);
-
- if (!target)
- {
- // does anchor look like "(2)" for slide 2 ??
- // where first slide is (1)
- var re = /\((\d)+\)/;
-
- if (anchor.match(re))
- {
- var num = parseInt(anchor.substring(1, anchor.length-1));
-
- if (num > slides.length)
- num = 1;
-
- if (--num < 0)
- num = 0;
-
- return num;
- }
-
- // accept [2] for backwards compatibility
- re = /\[(\d)+\]/;
-
- if (anchor.match(re))
- {
- var num = parseInt(anchor.substring(1, anchor.length-1));
-
- if (num > slides.length)
- num = 1;
-
- if (--num < 0)
- num = 0;
-
- return num;
- }
-
- // oh dear unknown anchor
- return 0;
- }
-
- // search for enclosing slide
-
- while (true)
- {
- // browser coerces html elements to uppercase!
- if (target.nodeName.toLowerCase() == "div" &&
- hasClass(target, "slide"))
- {
- // found the slide element
- break;
- }
-
- // otherwise try parent element if any
-
- target = target.parentNode;
-
- if (!target)
- {
- return 0; // no luck!
- }
- };
-
- for (i = 0; i < slides.length; ++i)
- {
- if (slides[i] == target)
- return i; // success
- }
-
- // oh dear still no luck
- return 0;
-}
-
-// find slide name from first h1 element
-// default to document title + slide number
-function slideName(index)
-{
- var name = null;
- var slide = slides[index];
-
- var heading = findHeading(slide);
-
- if (heading)
- name = extractText(heading);
-
- if (!name)
- name = title + "(" + (index + 1) + ")";
-
- name.replace(/\&/g, "&");
- name.replace(/\/g, ">");
-
- return name;
-}
-
-// find first h1 element in DOM tree
-function findHeading(node)
-{
- if (!node || node.nodeType != 1)
- return null;
-
- if (node.nodeName == "H1" || node.nodeName == "h1")
- return node;
-
- var child = node.firstChild;
-
- while (child)
- {
- node = findHeading(child);
-
- if (node)
- return node;
-
- child = child.nextSibling;
- }
-
- return null;
-}
-
-// recursively extract text from DOM tree
-function extractText(node)
-{
- if (!node)
- return "";
-
- // text nodes
- if (node.nodeType == 3)
- return node.nodeValue;
-
- // elements
- if (node.nodeType == 1)
- {
- node = node.firstChild;
- var text = "";
-
- while (node)
- {
- text = text + extractText(node);
- node = node.nextSibling;
- }
-
- return text;
- }
-
- return "";
-}
-
-
-// find copyright text from meta element
-function findCopyright()
-{
- var name, content;
- var meta = document.getElementsByTagName("meta");
-
- for (var i = 0; i < meta.length; ++i)
- {
- name = meta[i].getAttribute("name");
- content = meta[i].getAttribute("content");
-
- if (name == "copyright")
- return content;
- }
-
- return null;
-}
-
-function findSizeAdjust()
-{
- var name, content, offset;
- var meta = document.getElementsByTagName("meta");
-
- for (var i = 0; i < meta.length; ++i)
- {
- name = meta[i].getAttribute("name");
- content = meta[i].getAttribute("content");
-
- if (name == "font-size-adjustment")
- return 1 * content;
- }
-
- return 0;
-}
-
-function addToolbar()
-{
- var slideCounter, page;
-
- var toolbar = createElement("div");
- toolbar.setAttribute("class", "toolbar");
-
- if (ns_pos) // a reasonably behaved browser
- {
- var right = document.createElement("div");
- right.setAttribute("style", "float: right; text-align: right");
-
- slideCounter = document.createElement("div")
- slideCounter.innerHTML = "slide".localize() + " n/m";
- right.appendChild(slideCounter);
- toolbar.appendChild(right);
-
- var left = document.createElement("div");
- left.setAttribute("style", "text-align: left");
-
- // global end of slide indicator
- eos = document.createElement("span");
- eos.innerHTML = "* ";
- left.appendChild(eos);
-
- var help = document.createElement("a");
- help.setAttribute("href", helpPage);
- help.setAttribute("title", helpText.localize());
- help.innerHTML = "help?".localize();
- left.appendChild(help);
- helpAnchor = help; // save for focus hack
-
- var gap1 = document.createTextNode(" ");
- left.appendChild(gap1);
-
- var contents = document.createElement("a");
- contents.setAttribute("href", "javascript:toggleTableOfContents()");
- contents.setAttribute("title", "table of contents".localize());
- contents.innerHTML = "contents?".localize();
- left.appendChild(contents);
-
- var gap2 = document.createTextNode(" ");
- left.appendChild(gap2);
-
- var i = location.href.indexOf("#");
-
- // check if anchor is entire page
-
- if (i > 0)
- page = location.href.substr(0, i);
- else
- page = location.href;
-
- var start = document.createElement("a");
- start.setAttribute("href", page);
- start.setAttribute("title", "restart presentation".localize());
- start.innerHTML = "restart?".localize();
-// start.setAttribute("href", "javascript:printSlides()");
-// start.setAttribute("title", "print all slides".localize());
-// start.innerHTML = "print!".localize();
- left.appendChild(start);
-
- var copyright = findCopyright();
-
- if (copyright)
- {
- var span = document.createElement("span");
- span.innerHTML = copyright;
- span.style.color = "black";
- span.style.marginLeft = "4em";
- left.appendChild(span);
- }
-
- toolbar.appendChild(left);
- }
- else // IE so need to work around its poor CSS support
- {
- toolbar.style.position = (ie7 ? "fixed" : "absolute");
- toolbar.style.zIndex = "200";
- toolbar.style.width = "99.9%";
- toolbar.style.height = "1.2em";
- toolbar.style.top = "auto";
- toolbar.style.bottom = "0";
- toolbar.style.left = "0";
- toolbar.style.right = "0";
- toolbar.style.textAlign = "left";
- toolbar.style.fontSize = "60%";
- toolbar.style.color = "red";
- toolbar.borderWidth = 0;
- toolbar.style.background = "rgb(240,240,240)";
-
- // would like to have help text left aligned
- // and page counter right aligned, floating
- // div's don't work, so instead use nested
- // absolutely positioned div's.
-
- var sp = document.createElement("span");
- sp.innerHTML = " * ";
- toolbar.appendChild(sp);
- eos = sp; // end of slide indicator
-
- var help = document.createElement("a");
- help.setAttribute("href", helpPage);
- help.setAttribute("title", helpText.localize());
- help.innerHTML = "help?".localize();
- toolbar.appendChild(help);
- helpAnchor = help; // save for focus hack
-
- var gap1 = document.createTextNode(" ");
- toolbar.appendChild(gap1);
-
- var contents = document.createElement("a");
- contents.setAttribute("href", "javascript:toggleTableOfContents()");
- contents.setAttribute("title", "table of contents".localize());
- contents.innerHTML = "contents?".localize();
- toolbar.appendChild(contents);
-
- var gap2 = document.createTextNode(" ");
- toolbar.appendChild(gap2);
-
- var i = location.href.indexOf("#");
-
- // check if anchor is entire page
-
- if (i > 0)
- page = location.href.substr(0, i);
- else
- page = location.href;
-
- var start = document.createElement("a");
- start.setAttribute("href", page);
- start.setAttribute("title", "restart presentation".localize());
- start.innerHTML = "restart?".localize();
-// start.setAttribute("href", "javascript:printSlides()");
-// start.setAttribute("title", "print all slides".localize());
-// start.innerHTML = "print!".localize();
- toolbar.appendChild(start);
-
- var copyright = findCopyright();
-
- if (copyright)
- {
- var span = document.createElement("span");
- span.innerHTML = copyright;
- span.style.color = "black";
- span.style.marginLeft = "2em";
- toolbar.appendChild(span);
- }
-
- slideCounter = document.createElement("div")
- slideCounter.style.position = "absolute";
- slideCounter.style.width = "auto"; //"20%";
- slideCounter.style.height = "1.2em";
- slideCounter.style.top = "auto";
- slideCounter.style.bottom = 0;
- slideCounter.style.right = "0";
- slideCounter.style.textAlign = "right";
- slideCounter.style.color = "red";
- slideCounter.style.background = "rgb(240,240,240)";
-
- slideCounter.innerHTML = "slide".localize() + " n/m";
- toolbar.appendChild(slideCounter);
- }
-
- // ensure that click isn't passed through to the page
- toolbar.onclick = stopPropagation;
- document.body.appendChild(toolbar);
- slideNumElement = slideCounter;
- setEosStatus(false);
-
- return toolbar;
-}
-
-function isShownToc()
-{
- if (toc && toc.style.visible == "visible")
- return true;
-
- return false;
-}
-
-function showTableOfContents()
-{
- if (toc)
- {
- if (toc.style.visibility != "visible")
- {
- toc.style.visibility = "visible";
- toc.style.display = "block";
- toc.focus();
-
- if (ie7 && slidenum == 0)
- setTimeout("ieHack()", 100);
- }
- else
- hideTableOfContents();
- }
-}
-
-function hideTableOfContents()
-{
- if (toc && toc.style.visibility != "hidden")
- {
- toc.style.visibility = "hidden";
- toc.style.display = "none";
-
- try
- {
- if (!opera)
- helpAnchor.focus();
- }
- catch (e)
- {
- }
- }
-}
-
-function toggleTableOfContents()
-{
- if (toc)
- {
- if (toc.style.visible != "visible")
- showTableOfContents();
- else
- hideTableOfContents();
- }
-}
-
-// called on clicking toc entry
-function gotoEntry(e)
-{
- var target;
-
- if (!e)
- var e = window.event;
-
- if (e.target)
- target = e.target;
- else if (e.srcElement)
- target = e.srcElement;
-
- // work around Safari bug
- if (target.nodeType == 3)
- target = target.parentNode;
-
- if (target && target.nodeType == 1)
- {
- var uri = target.getAttribute("href");
-
- if (uri)
- {
- //alert("going to " + uri);
- var slide = slides[slidenum];
- hideSlide(slide);
- slidenum = findSlideNumber(uri);
- slide = slides[slidenum];
- lastShown = null;
- setLocation();
- setVisibilityAllIncremental("hidden");
- setEosStatus(!nextIncrementalItem(lastShown));
- showSlide(slide);
- //target.focus();
-
- try
- {
- if (!opera)
- helpAnchor.focus();
- }
- catch (e)
- {
- }
- }
- }
-
- hideTableOfContents(e);
- if (ie7) ieHack();
- stopPropagation(e);
- return cancel(e);
-}
-
-// called onkeydown for toc entry
-function gotoTocEntry(event)
-{
- var key;
-
- if (!event)
- var event = window.event;
-
- // kludge around NS/IE differences
- if (window.event)
- key = window.event.keyCode;
- else if (event.which)
- key = event.which;
- else
- return true; // Yikes! unknown browser
-
- // ignore event if key value is zero
- // as for alt on Opera and Konqueror
- if (!key)
- return true;
-
- // check for concurrent control/command/alt key
- // but are these only present on mouse events?
-
- if (event.ctrlKey || event.altKey)
- return true;
-
- if (key == 13)
- {
- var uri = this.getAttribute("href");
-
- if (uri)
- {
- //alert("going to " + uri);
- var slide = slides[slidenum];
- hideSlide(slide);
- slidenum = findSlideNumber(uri);
- slide = slides[slidenum];
- lastShown = null;
- setLocation();
- setVisibilityAllIncremental("hidden");
- setEosStatus(!nextIncrementalItem(lastShown));
- showSlide(slide);
- //target.focus();
-
- try
- {
- if (!opera)
- helpAnchor.focus();
- }
- catch (e)
- {
- }
- }
-
- hideTableOfContents();
- if (ie7) ieHack();
- return cancel(event);
- }
-
- if (key == 40 && this.next)
- {
- this.next.focus();
- return cancel(event);
- }
-
- if (key == 38 && this.previous)
- {
- this.previous.focus();
- return cancel(event);
- }
-
- return true;
-}
-
-function isTitleSlide(slide)
-{
- return hasClass(slide, "title");
-}
-
-// create div element with links to each slide
-function tableOfContents()
-{
- var toc = document.createElement("div");
- addClass(toc, "toc");
- //toc.setAttribute("tabindex", "0");
-
- var heading = document.createElement("div");
- addClass(heading, "toc-heading");
- heading.innerHTML = "Table of Contents".localize();
-
- heading.style.textAlign = "center";
- heading.style.width = "100%";
- heading.style.margin = "0";
- heading.style.marginBottom = "1em";
- heading.style.borderBottomStyle = "solid";
- heading.style.borderBottomColor = "rgb(180,180,180)";
- heading.style.borderBottomWidth = "1px";
-
- toc.appendChild(heading);
- var previous = null;
-
- for (var i = 0; i < slides.length; ++i)
- {
- var title = hasClass(slides[i], "title");
- var num = document.createTextNode((i + 1) + ". ");
-
- toc.appendChild(num);
-
- var a = document.createElement("a");
- a.setAttribute("href", "#(" + (i+1) + ")");
-
- if (title)
- addClass(a, "titleslide");
-
- var name = document.createTextNode(slideName(i));
- a.appendChild(name);
- a.onclick = gotoEntry;
- a.onkeydown = gotoTocEntry;
- a.previous = previous;
-
- if (previous)
- previous.next = a;
-
- toc.appendChild(a);
-
- if (i == 0)
- toc.first = a;
-
- if (i < slides.length - 1)
- {
- var br = document.createElement("br");
- toc.appendChild(br);
- }
-
- previous = a;
- }
-
- toc.focus = function () {
- if (this.first)
- this.first.focus();
- }
-
- toc.onclick = function (e) {
- e||(e=window.event);
- hideTableOfContents();
- stopPropagation(e);
-
- if (e.cancel != undefined)
- e.cancel = true;
-
- if (e.returnValue != undefined)
- e.returnValue = false;
-
- return false;
- };
-
- toc.style.position = "absolute";
- toc.style.zIndex = "300";
- toc.style.width = "60%";
- toc.style.maxWidth = "30em";
- toc.style.height = "30em";
- toc.style.overflow = "auto";
- toc.style.top = "auto";
- toc.style.right = "auto";
- toc.style.left = "4em";
- toc.style.bottom = "4em";
- toc.style.padding = "1em";
- toc.style.background = "rgb(240,240,240)";
- toc.style.borderStyle = "solid";
- toc.style.borderWidth = "2px";
- toc.style.fontSize = "60%";
-
- document.body.insertBefore(toc, document.body.firstChild);
- return toc;
-}
-
-function replaceByNonBreakingSpace(str)
-{
- for (var i = 0; i < str.length; ++i)
- str[i] = 160;
-}
-
-
-function initOutliner()
-{
- var items = document.getElementsByTagName("LI");
-
- for (var i = 0; i < items.length; ++i)
- {
- var target = items[i];
-
- if (!hasClass(target.parentNode, "outline"))
- continue;
-
- target.onclick = outlineClick;
-
- if (!ns_pos)
- {
- target.onmouseover = hoverOutline;
- target.onmouseout = unhoverOutline;
- }
-
- if (foldable(target))
- {
- target.foldable = true;
- target.onfocus = function () {outline = this;};
- target.onblur = function () {outline = null;};
-
- if (!target.getAttribute("tabindex"))
- target.setAttribute("tabindex", "0");
-
- if (hasClass(target, "expand"))
- unfold(target);
- else
- fold(target);
- }
- else
- {
- addClass(target, "nofold");
- target.visible = true;
- target.foldable = false;
- }
- }
-}
-
-function foldable(item)
-{
- if (!item || item.nodeType != 1)
- return false;
-
- var node = item.firstChild;
-
- while (node)
- {
- if (node.nodeType == 1 && isBlock(node))
- return true;
-
- node = node.nextSibling;
- }
-
- return false;
-}
-
-function fold(item)
-{
- if (item)
- {
- removeClass(item, "unfolded");
- addClass(item, "folded");
- }
-
- var node = item ? item.firstChild : null;
-
- while (node)
- {
- if (node.nodeType == 1 && isBlock(node)) // element
- {
- // note that getElementStyle won't work for Safari 1.3
- node.display = getElementStyle(node, "display", "display");
- node.style.display = "none";
- node.style.visibility = "hidden";
- }
-
- node = node.nextSibling;
- }
-
- item.visible = false;
-}
-
-function unfold(item)
-{
- if (item)
- {
- addClass(item, "unfolded");
- removeClass(item, "folded");
- }
-
- var node = item ? item.firstChild : null;
-
- while (node)
- {
- if (node.nodeType == 1 && isBlock(node)) // element
- {
- // with fallback for Safari, see above
- node.style.display = (node.display ? node.display : "block");
- node.style.visibility = "visible";
- }
-
- node = node.nextSibling;
- }
-
- item.visible = true;
-}
-
-function outlineClick(e)
-{
- var rightclick = false;
- var target;
-
- if (!e)
- var e = window.event;
-
- if (e.target)
- target = e.target;
- else if (e.srcElement)
- target = e.srcElement;
-
- // work around Safari bug
- if (target.nodeType == 3)
- target = target.parentNode;
-
- while (target && target.visible == undefined)
- target = target.parentNode;
-
- if (!target)
- return true;
-
- if (e.which)
- rightclick = (e.which == 3);
- else if (e.button)
- rightclick = (e.button == 2);
-
- if (!rightclick && target.visible != undefined)
- {
- if (target.foldable)
- {
- if (target.visible)
- fold(target);
- else
- unfold(target);
- }
-
- stopPropagation(e);
- e.cancel = true;
- e.returnValue = false;
- }
-
- return false;
-}
-
-function hoverOutline(e)
-{
- var target;
-
- if (!e)
- var e = window.event;
-
- if (e.target)
- target = e.target;
- else if (e.srcElement)
- target = e.srcElement;
-
- // work around Safari bug
- if (target.nodeType == 3)
- target = target.parentNode;
-
- while (target && target.visible == undefined)
- target = target.parentNode;
-
- if (target && target.foldable)
- target.style.cursor = "pointer";
-
- return true;
-}
-
-function unhoverOutline(e)
-{
- var target;
-
- if (!e)
- var e = window.event;
-
- if (e.target)
- target = e.target;
- else if (e.srcElement)
- target = e.srcElement;
-
- // work around Safari bug
- if (target.nodeType == 3)
- target = target.parentNode;
-
- while (target && target.visible == undefined)
- target = target.parentNode;
-
- if (target)
- target.style.cursor = "default";
-
- return true;
-}
-
-
-function stopPropagation(e)
-{
- if (window.event)
- {
- window.event.cancelBubble = true;
- //window.event.returnValue = false;
- }
- else if (e)
- {
- e.cancelBubble = true;
- e.stopPropagation();
- //e.preventDefault();
- }
-}
-
-/* can't rely on display since we set that to none to hide things */
-function isBlock(elem)
-{
- var tag = elem.nodeName;
-
- return tag == "OL" || tag == "UL" || tag == "P" ||
- tag == "LI" || tag == "TABLE" || tag == "PRE" ||
- tag == "H1" || tag == "H2" || tag == "H3" ||
- tag == "H4" || tag == "H5" || tag == "H6" ||
- tag == "BLOCKQUOTE" || tag == "ADDRESS";
-}
-
-function getElementStyle(elem, IEStyleProp, CSSStyleProp)
-{
- if (elem.currentStyle)
- {
- return elem.currentStyle[IEStyleProp];
- }
- else if (window.getComputedStyle)
- {
- var compStyle = window.getComputedStyle(elem, "");
- return compStyle.getPropertyValue(CSSStyleProp);
- }
- return "";
-}
-
-// works with text/html and text/xhtml+xml with thanks to Simon Willison
-function createElement(element)
-{
- if (typeof document.createElementNS != 'undefined')
- {
- return document.createElementNS('http://www.w3.org/1999/xhtml', element);
- }
-
- if (typeof document.createElement != 'undefined')
- {
- return document.createElement(element);
- }
-
- return false;
-}
-
-// designed to work with both text/html and text/xhtml+xml
-function getElementsByTagName(name)
-{
- if (typeof document.getElementsByTagNameNS != 'undefined')
- {
- return document.getElementsByTagNameNS('http://www.w3.org/1999/xhtml', name);
- }
-
- if (typeof document.getElementsByTagName != 'undefined')
- {
- return document.getElementsByTagName(name);
- }
-
- return null;
-}
-
-/*
-// clean alternative to innerHTML method, but on IE6
-// it doesn't work with named entities like
-// which need to be replaced by numeric entities
-function insertText(element, text)
-{
- try
- {
- element.textContent = text; // DOM3 only
- }
- catch (e)
- {
- if (element.firstChild)
- {
- // remove current children
- while (element.firstChild)
- element.removeChild(element.firstChild);
- }
-
- element.appendChild(document.createTextNode(text));
- }
-}
-
-// as above, but as method of all element nodes
-// doesn't work in IE6 which doesn't allow you to
-// add methods to the HTMLElement prototype
-if (HTMLElement != undefined)
-{
- HTMLElement.prototype.insertText = function(text) {
- var element = this;
-
- try
- {
- element.textContent = text; // DOM3 only
- }
- catch (e)
- {
- if (element.firstChild)
- {
- // remove current children
- while (element.firstChild)
- element.removeChild(element.firstChild);
- }
-
- element.appendChild(document.createTextNode(text));
- }
- };
-}
-*/
-
-function getSelectedText()
-{
- try
- {
- if (window.getSelection)
- return window.getSelection().toString();
-
- if (document.getSelection)
- return document.getSelection().toString();
-
- if (document.selection)
- return document.selection.createRange().text;
- }
- catch (e)
- {
- return "";
- }
- return "";
-}
-
-
- 