// You must also add a numLeafs property before calling init().
function BookReader() {
+
+ // Mode constants
+ this.constMode1up = 1;
+ this.constMode2up = 2;
+ this.constModeThumb = 3;
+
this.reduce = 4;
- this.padding = 0;
- this.mode = 1; //1, 2, 3
- this.ui = 'full'; // UI mode
+ this.padding = 10; // Padding in 1up
+
+ this.mode = this.constMode1up;
+ this.ui = 'full'; // UI mode
+ this.uiAutoHide = true; // Controls whether nav/toolbar will autohide
// thumbnail mode
this.thumbWidth = 100; // will be overridden during prepareThumbnailView
this.thumbRowBuffer = 2; // number of rows to pre-cache out a view
this.thumbColumns = 6; // default
this.thumbMaxLoading = 4; // number of thumbnails to load at once
+ this.thumbPadding = 10; // spacing between thumbnails
this.displayedRows=[];
this.displayedIndices = [];
// path in the CSS. Would be better to automagically find that path.
this.imagesBaseURL = '/bookreader/images/';
- // Mode constants
- this.constMode1up = 1;
- this.constMode2up = 2;
- this.constModeThumb = 3;
// Zoom levels
// $$$ provide finer grained zooming
autofit: 'auto'
};
+ // This object/dictionary controls which optional features are enabled
+ // XXXmang in progress
+ this.features = {
+ // search
+ // read aloud
+ // open library entry
+ // table of contents
+ // embed/share ui
+ // info ui
+ };
+
+ // Text-to-Speech params
+ this.ttsPlaying = false;
+ this.ttsIndex = null; //leaf index
+ this.ttsPosition = -1; //chunk (paragraph) number
+ this.ttsBuffering = false;
+ this.ttsPoller = null;
+ this.ttsFormat = null;
+
return this;
};
// Autohide nav after showing for awhile
var self = this;
- $(window).bind('load', function() {
- setTimeout(function() { self.hideNavigation(); }, 3000);
- });
+ if (this.uiAutoHide) {
+ $(window).bind('load', function() {
+ setTimeout(function() { self.hideNavigation(); }, 3000);
+ });
+ };
$("#BRcontainer").bind('scroll', this, function(e) {
e.data.loadLeafs();
// Enact other parts of initial params
this.updateFromParams(params);
- //XXXmang window.setTimeout(self.hideNavigation, 3000);
+ // Start AJAX request for OL data
+ if (this.getOpenLibraryRecord) {
+ this.getOpenLibraryRecord(this.gotOpenLibraryRecord);
+ }
}
BookReader.prototype.setupKeyListeners = function() {
// Calculate the position of every thumbnail. $$$ cache instead of calculating on every draw
for (i=0; i<this.numLeafs; i++) {
leafWidth = this.thumbWidth;
- if (rightPos + (leafWidth + this.padding) > viewWidth){
+ if (rightPos + (leafWidth + this.thumbPadding) > viewWidth){
currentRow++;
rightPos = 0;
leafIndex = 0;
if (leafHeight > leafMap[currentRow].height) {
leafMap[currentRow].height = leafHeight;
}
- if (leafIndex===0) { bottomPos += this.padding + leafMap[currentRow].height; }
- rightPos += leafWidth + this.padding;
+ if (leafIndex===0) { bottomPos += this.thumbPadding + leafMap[currentRow].height; }
+ rightPos += leafWidth + this.thumbPadding;
if (rightPos > maxRight) { maxRight = rightPos; }
leafIndex++;
if (i == seekIndex) {
- seekTop = bottomPos - this.padding - leafMap[currentRow].height;
+ seekTop = bottomPos - this.thumbPadding - leafMap[currentRow].height;
}
}
// Determine the thumbnails in view
for (i=0; i<leafMap.length; i++) {
- leafBottom += this.padding + leafMap[i].height;
+ leafBottom += this.thumbPadding + leafMap[i].height;
var topInView = (leafTop >= scrollTop) && (leafTop <= scrollBottom);
var bottomInView = (leafBottom >= scrollTop) && (leafBottom <= scrollBottom);
var middleInView = (leafTop <=scrollTop) && (leafBottom>=scrollBottom);
div.style.position = "absolute";
div.className = "BRpagedivthumb";
- left += this.padding;
+ left += this.thumbPadding;
$(div).css('top', leafTop + 'px');
$(div).css('left', left+'px');
$(div).css('width', leafWidth+'px');
// Note: #BRpageview must already exist since its width is used to calculate the
// thumbnail width
BookReader.prototype.getThumbnailWidth = function(thumbnailColumns) {
- var padding = (thumbnailColumns + 1) * this.padding;
+ var padding = (thumbnailColumns + 1) * this.thumbPadding;
var width = ($('#BRpageview').width() - padding) / (thumbnailColumns + 0.5); // extra 0.5 is for some space at sides
return parseInt(width);
}
for (i=0; i<(index+1); i++) {
leafWidth = this.thumbWidth;
- if (rightPos + (leafWidth + this.padding) > viewWidth){
+ if (rightPos + (leafWidth + this.thumbPadding) > viewWidth){
rightPos = 0;
rowHeight = 0;
leafIndex = 0;
leafHeight = parseInt((this.getPageHeight(leafIndex)*this.thumbWidth)/this.getPageWidth(leafIndex), 10);
if (leafHeight > rowHeight) { rowHeight = leafHeight; }
if (leafIndex==0) { leafTop = bottomPos; }
- if (leafIndex==0) { bottomPos += this.padding + rowHeight; }
- rightPos += leafWidth + this.padding;
+ if (leafIndex==0) { bottomPos += this.thumbPadding + rowHeight; }
+ rightPos += leafWidth + this.thumbPadding;
leafIndex++;
}
this.firstIndex=index;
}
this.autoStop();
+ this.ttsStop();
this.removeSearchHilites();
this.mode = mode;
$(this.leafEdgeL).bind('click', this, function(e) {
e.data.autoStop();
+ e.data.ttsStop();
var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
e.data.jumpToIndex(jumpIndex);
});
$(this.leafEdgeR).bind('click', this, function(e) {
e.data.autoStop();
+ e.data.ttsStop();
var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
e.data.jumpToIndex(jumpIndex);
});
this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexL],
{ self: this },
function(e) {
+ e.data.self.ttsStop();
e.data.self.left();
e.preventDefault();
}
this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexR],
{ self: this },
function(e) {
+ e.data.self.ttsStop();
e.data.self.right();
e.preventDefault();
}
//console.log('appending ' + key);
}
- // We calculate the reduction factor for the specific page because it can be different
- // for each page in the spread
- var height = this._getPageHeight(key);
- var width = this._getPageWidth(key)
- var reduce = this.twoPage.height/height;
- var scaledW = parseInt(width*reduce);
-
- var gutter = this.twoPageGutter();
- var pageL;
- if ('L' == this.getPageSide(key)) {
- pageL = gutter-scaledW;
- } else {
- pageL = gutter;
- }
- var pageT = this.twoPageTop();
-
- $(result.div).css({
- width: (result.r-result.l)*reduce + 'px',
- height: (result.b-result.t)*reduce + 'px',
- left: pageL+(result.l)*reduce + 'px',
- top: pageT+(result.t)*reduce +'px'
- });
+ this.setHilightCss2UP(result.div, key, result.l, result.r, result.t, result.b);
} else {
//console.log(key + ' not displayed');
}
}
+// setHilightCss2UP()
+//______________________________________________________________________________
+//position calculation shared between search and text-to-speech functions
+BookReader.prototype.setHilightCss2UP = function(div, index, left, right, top, bottom) {
+
+ // We calculate the reduction factor for the specific page because it can be different
+ // for each page in the spread
+ var height = this._getPageHeight(index);
+ var width = this._getPageWidth(index)
+ var reduce = this.twoPage.height/height;
+ var scaledW = parseInt(width*reduce);
+
+ var gutter = this.twoPageGutter();
+ var pageL;
+ if ('L' == this.getPageSide(index)) {
+ pageL = gutter-scaledW;
+ } else {
+ pageL = gutter;
+ }
+ var pageT = this.twoPageTop();
+
+ $(div).css({
+ width: (right-left)*reduce + 'px',
+ height: (bottom-top)*reduce + 'px',
+ left: pageL+left*reduce + 'px',
+ top: pageT+top*reduce +'px'
+ });
+}
+
// removeSearchHilites()
//______________________________________________________________________________
BookReader.prototype.removeSearchHilites = function() {
// showEmbedCode()
//______________________________________________________________________________
BookReader.prototype.showEmbedCode = function() {
+ if (null != this.embedPopup) { // check if already showing
+ return;
+ }
+ this.autoStop();
+ this.ttsStop();
+
this.embedPopup = document.createElement("div");
$(this.embedPopup).css({
position: 'absolute',
// could be as simple as not calling this function
BookReader.prototype.initNavbar = function() {
// Setup nav / chapter / search results bar
- $('.chapter').bt({
- contentSelector: '$(this).find(".title")',
- trigger: 'hover',
+
+ // $$$ should make this work inside the BookReader div (self-contained), rather than after
+ $('#BookReader').after(
+ '<div id="BRnav">'
+ + '<div id="BRpage">'
+ + '<button class="BRicon book_left"></button>'
+ + '<button class="BRicon book_right"></button>'
+ + '</div>'
+ + '<div id="BRnavpos">'
+ + '<div id="BRfiller"></div>'
+ + '<div id="BRpager">'
+ + '<div id="BRslider">'
+ + '<div id="slider"></div>'
+ + '<div id="pager"></div>'
+ // XXXmang update code to update pagenum
+ + '<div id="pagenum"><span>n141</span> / 325</div>'
+ + '</div>'
+ + '</div>'
+ + '<div id="BRnavline">'
+ + '<div class="BRnavend" id="BRnavleft"></div>'
+ + '<div class="BRnavend" id="BRnavright"></div>'
+ + '</div>'
+ + '</div>'
+ + '</div>'
+ );
+
+/*
+ <div class="searchChap" style="left:49%;" title="Search result">
+ <div class="query">
+ A related distinction is between the emotion and the results of the emotion, principally behaviors and <strong><a href="">emotional</a></strong> expressions. People often behave in certain ways as a direct result of their <strong><a href="">emotional</a></strong> state, such as crying, fighting or fleeing. <span>Page 163</span>
+ <div class="queryChap">IV. The Witch <span>|</span> Page 163</div>
+ </div>
+ </div>
+*/
+
+ /* $$$mang search results and chapters should automatically coalesce
+ $('.searchChap').bt({
+ contentSelector: '$(this).find(".query")',
+ trigger: 'click',
closeWhenOthersOpen: true,
cssStyles: {
- backgroundColor: '#000',
- border: '2px solid #e2dcc5',
+ width: '250px',
+ padding: '10px 10px 15px',
+ backgroundColor: '#fff',
+ border: '3px solid #e2dcc5',
borderBottom: 'none',
- padding: '5px 10px',
- fontFamily: '"Arial", sans-serif',
- fontSize: '11px',
- fontWeight: '700',
- color: '#fff',
- whiteSpace: 'nowrap'
+ fontFamily: '"Lucida Grande","Arial",sans-serif',
+ fontSize: '12px',
+ lineHeight: '18px',
+ color: '#615132'
},
- shrinkToFit: true,
- width: '200px',
+ shrinkToFit: false,
+ width: '230px',
padding: 0,
spikeGirth: 0,
spikeLength: 0,
- overlap: '16px',
+ overlap: '10px',
overlay: false,
killTitle: true,
textzIndex: 9999,
wrapperzIndex: 9997,
offsetParent: null,
positions: ['top'],
- fill: 'black',
+ fill: 'white',
windowMargin: 10,
- strokeWidth: 0,
+ strokeWidth: 3,
+ strokeStyle: '#e2dcc5',
cornerRadius: 0,
centerPointX: 0,
centerPointY: 0,
shadow: false
});
- $('.search').bt({
+ $('.searchChap').each(function(){
+ $(this).hover(function(){
+ $(this).addClass('front');
+ },function(){
+ $(this).removeClass('front');
+ });
+ });
+ */
+}
+
+BookReader.prototype.addSearchResult = function(queryString, pageNumber, pageIndex) {
+ var uiStringSearch = "Search result"; // i18n
+ var uiStringPage = "Page"; // i18n
+
+ var percentThrough = BookReader.util.cssPercentage(pageIndex, this.numLeafs);
+
+ // $$$mang add click-through to page
+ $('<div class="search" style="left:' + percentThrough + ';" title="' + uiStringSearch + '"><div class="query">'
+ + queryString + '<span>' + uiStringPage + ' ' + pageNumber + '</span></div>')
+ .appendTo('#BRnavpos').bt({
contentSelector: '$(this).find(".query")',
trigger: 'click',
closeWhenOthersOpen: true,
centerPointX: 0,
centerPointY: 0,
shadow: false
- });
- $('.searchChap').bt({
- contentSelector: '$(this).find(".query")',
- trigger: 'click',
+ })
+ .hover(function(){
+ $(this).addClass('front');
+ },function(){
+ $(this).removeClass('front');
+ }
+ );
+}
+
+BookReader.prototype.removeSearchResults = function() {
+ $('#BRnavpos .search').remove();
+}
+
+BookReader.prototype.addChapter = function(chapterTitle, pageNumber, pageIndex) {
+ var uiStringPage = 'Page'; // i18n
+
+ var percentThrough = BookReader.util.cssPercentage(pageIndex, this.numLeafs);
+
+ $('<div class="chapter" style="left:' + percentThrough + ';"><div class="title">'
+ + chapterTitle + '<span>|</span> ' + uiStringPage + ' ' + pageNumber + '</div></div>')
+ .appendTo('#BRnavpos')
+ .data({'self': this, 'pageIndex': pageIndex })
+ .bt({
+ contentSelector: '$(this).find(".title")',
+ trigger: 'hover',
closeWhenOthersOpen: true,
cssStyles: {
- width: '250px',
- padding: '10px 10px 15px',
- backgroundColor: '#fff',
- border: '3px solid #e2dcc5',
+ backgroundColor: '#000',
+ border: '2px solid #e2dcc5',
borderBottom: 'none',
- fontFamily: '"Lucida Grande","Arial",sans-serif',
- fontSize: '12px',
- lineHeight: '18px',
- color: '#615132'
+ padding: '5px 10px',
+ fontFamily: '"Arial", sans-serif',
+ fontSize: '11px',
+ fontWeight: '700',
+ color: '#fff',
+ whiteSpace: 'nowrap'
},
- shrinkToFit: false,
- width: '230px',
+ shrinkToFit: true,
+ width: '200px',
padding: 0,
spikeGirth: 0,
spikeLength: 0,
- overlap: '10px',
+ overlap: '16px',
overlay: false,
killTitle: true,
textzIndex: 9999,
wrapperzIndex: 9997,
offsetParent: null,
positions: ['top'],
- fill: 'white',
+ fill: 'black',
windowMargin: 10,
- strokeWidth: 3,
- strokeStyle: '#e2dcc5',
+ strokeWidth: 0,
cornerRadius: 0,
centerPointX: 0,
centerPointY: 0,
shadow: false
+ })
+ .hover( function() {
+ $(this).addClass('front');
+ }, function() {
+ $(this).removeClass('front');
+ }
+ )
+ .bind('click', function() {
+ $(this).data('self').jumpToIndex($(this).data('pageIndex'));
});
+}
+
+/*
+ * Remove all chapters.
+ */
+BookReader.prototype.removeChapters = function() {
+ $('#BRnavpos .chapter').remove();
+}
+
+/*
+ * Update the table of contents based on array of TOC entries.
+ */
+BookReader.prototype.updateTOC = function(tocEntries) {
+ this.removeChapters();
+ for (var i = 0; i < tocEntries.length; i++) {
+ this.addChapterFromEntry(tocEntries[i]);
+ }
+}
+
+/*
+ * Example table of contents entry - this format is defined by Open Library
+ * {
+ * "pagenum": "17",
+ * "level": 1,
+ * "label": "CHAPTER I",
+ * "type": {"key": "/type/toc_item"},
+ * "title": "THE COUNTRY AND THE MISSION"
+ * }
+ */
+BookReader.prototype.addChapterFromEntry = function(tocEntryObject) {
+ console.log(tocEntryObject);
+ var pageIndex = this.getPageIndex(tocEntryObject['pagenum']);
+ // Only add if we know where it is
+ if (pageIndex) {
+ this.addChapter(tocEntryObject['title'], tocEntryObject['pagenum'], pageIndex);
+ }
$('.chapter').each(function(){
$(this).hover(function(){
$(this).addClass('front');
});
$("#BRslider").draggable({axis:'x',containment:'parent'});
$("#BRzoombtn").draggable({axis:'y',containment:'parent'});
+ $("#BRslider").hover(
+ function(){
+ $("#pagenum").show();
+ },function(){
+ $("#pagenum").hide();
+ });
}
BookReader.prototype.initToolbar = function(mode, ui) {
+ // $$$mang should be contained within the BookReader div instead of body
$("body").append("<div id='BRtoolbar'>"
+ "<span id='BRtoolbarbuttons'>"
/* XXXmang integrate search */
+ "<form method='get' id='booksearch'><input type='search' id='textSrch' name='textSrch' val='' placeholder='Search inside'/><button type='submit' id='btnSrch' name='btnSrch'>GO</button></form>"
+ // XXXmang icons incorrect or handlers wrong
+ "<button class='BRicon info' onclick='br.switchMode(3); return false;'></button>"
+ "<button class='BRicon share' onclick='br.switchMode(2); return false;'></button>"
- + "<button class='BRicon read modal'></button>"
+ + "<button class='BRicon read modal' onclick='br.ttsToggle(); return false;'></button>"
+ "<button class='BRicon full'></button>"
+ "</span>"
+ "<span>"
+ "<a class='logo' href='" + this.logoURL + "'></a>"
+ // XXXmang update
+ "<div id='BRreturn'><span>Back to</span><a href='BOOK URL'>Book Title</a></div>"
+ "</span>"
// Handle mousemove related to navigation. Bind at #BookReader level to allow autohide.
BookReader.prototype.navigationMousemoveHandler = function(event) {
// $$$ possibly not great to be calling this for every mousemove
- var navkey = $(document).height() - 75;
- if ((event.pageY < 76) || (event.pageY > navkey)) {
- // inside or near navigation elements
- event.data['br'].hideNavigation();
- } else {
- event.data['br'].showNavigation();
+
+ if (event.data['br'].uiAutoHide) {
+ var navkey = $(document).height() - 75;
+ if ((event.pageY < 76) || (event.pageY > navkey)) {
+ // inside or near navigation elements
+ event.data['br'].hideNavigation();
+ } else {
+ event.data['br'].showNavigation();
+ }
}
}
if (newHash != self.oldUserHash) { // Only process new user hash once
//console.log('url change detected ' + self.oldLocationHash + " -> " + newHash);
+ self.ttsStop();
+
// Queue change if animating
if (self.animating) {
self.autoStop();
return this.getPageURI(index, reduce, rotate);
}
+/*
+ * Update based on received record from Open Library.
+ */
+BookReader.prototype.gotOpenLibraryRecord = function(self, olObject) {
+ // $$$ could refactor this so that 'this' is available
+ if (olObject) {
+ if (olObject['table_of_contents']) {
+ self.updateTOC(olObject['table_of_contents']);
+ }
+ }
+}
+
// Library functions
BookReader.util = {
disableSelect: function(jObject) {
return Math.min(Math.max(value, min), max);
},
+ // Given value and maximum, calculate a percentage suitable for CSS
+ cssPercentage: function(value, max) {
+ return parseInt(((value + 0.0) / max) * 100) + '%';
+ },
+
notInArray: function(value, array) {
// inArray returns -1 or undefined if value not in array
return ! (jQuery.inArray(value, array) >= 0);
}
// The final property here must NOT have a comma after it - IE7
}
+
+
+// ttsToggle()
+//______________________________________________________________________________
+BookReader.prototype.ttsToggle = function () {
+ if (false == this.ttsPlaying) {
+ if(soundManager.supported()) {
+ this.ttsStart();
+ } else {
+ soundManager.onready(function(oStatus) {
+ if (oStatus.success) {
+ this.ttsStart();
+ } else {
+ alert('Could not load soundManger2, possibly due to FlashBlock. Audio playback is disabled');
+ }
+ }, this);
+ }
+ } else {
+ this.ttsStop();
+ }
+}
+
+// ttsStart()
+//______________________________________________________________________________
+BookReader.prototype.ttsStart = function () {
+ if (soundManager.debugMode) console.log('starting readAloud');
+ if (this.constModeThumb == this.mode) this.switchMode(this.constMode1up);
+
+ this.ttsPlaying = true;
+ this.ttsIndex = this.currentIndex();
+ this.ttsFormat = 'mp3';
+ if ($.browser.mozilla) {
+ this.ttsFormat = 'ogg';
+ }
+ this.ttsGetText(this.ttsIndex, 'ttsStartCB');
+}
+
+// ttsStop()
+//______________________________________________________________________________
+BookReader.prototype.ttsStop = function () {
+ if (false == this.ttsPlaying) return;
+
+ if (soundManager.debugMode) console.log('stopping readaloud');
+ soundManager.stopAll();
+ soundManager.destroySound('chunk'+this.ttsIndex+'-'+this.ttsPosition);
+ this.ttsRemoveHilites();
+ this.ttsRemovePopup();
+
+ this.ttsPlaying = false;
+ this.ttsIndex = null; //leaf index
+ this.ttsPosition = -1; //chunk (paragraph) number
+ this.ttsBuffering = false;
+ this.ttsPoller = null;
+}
+
+// ttsGetText()
+//______________________________________________________________________________
+BookReader.prototype.ttsGetText = function(index, callback) {
+ var url = 'http://'+this.server+'/BookReader/BookReaderGetTextWrapper.php?path='+this.bookPath+'_djvu.xml&page='+index;
+ this.ttsAjax = $.ajax({url:url, dataType:'jsonp', jsonpCallback:callback});
+}
+
+// ttsStartCB(): text-to-speech callback
+//______________________________________________________________________________
+BookReader.prototype.ttsStartCB = function (data) {
+ if (soundManager.debugMode) console.log('ttsStartCB got data: ' + data);
+ this.ttsChunks = data;
+ this.ttsHilites = [];
+
+ //deal with the page being blank
+ if (0 == data.length) {
+ if (soundManager.debugMode) console.log('first page is blank!');
+ if(this.ttsAdvance(true)) {
+ this.ttsGetText(this.ttsIndex, 'ttsStartCB');
+ }
+ return;
+ }
+
+ this.ttsShowPopup();
+
+ ///// whileloading: broken on safari
+ ///// onload fires on safari, but *after* the sound starts playing..
+ this.ttsPosition = -1;
+ var snd = soundManager.createSound({
+ id: 'chunk'+this.ttsIndex+'-0',
+ //url: 'http://home.us.archive.org/~rkumar/arctic.ogg',
+ url: 'http://'+this.server+'/BookReader/BookReaderGetTTS.php?string=' + escape(data[0][0]) + '&format=.'+this.ttsFormat, //the .ogg is to trick SoundManager2 to use the HTML5 audio player
+ whileloading: function(){if (this.bytesLoaded == this.bytesTotal) this.br.ttsRemovePopup();}, //onload never fires in FF...
+ onload: function(){this.br.ttsRemovePopup();} //whileloading never fires in safari...
+ });
+ snd.br = this;
+ snd.load();
+
+ this.ttsNextChunk();
+}
+
+// ttsShowPopup
+//______________________________________________________________________________
+BookReader.prototype.ttsShowPopup = function() {
+ if (soundManager.debugMode) console.log('ttsShowPopup index='+this.ttsIndex+' pos='+this.ttsPosition);
+
+ this.popup = document.createElement("div");
+ $(this.popup).css({
+ top: $('#BRtoolbar').height() + 'px',
+ left: $('#BookReader').width()-220 + 'px',
+ width: '220px',
+ height: '20px',
+ }).attr('className', 'BRttsPopUp').appendTo('#BookReader');
+
+ htmlStr = ' ';
+
+ this.popup.innerHTML = htmlStr;
+}
+
+// ttsRemovePopup
+//______________________________________________________________________________
+BookReader.prototype.ttsRemovePopup = function() {
+ $(this.popup).remove();
+ this.popup=null;
+}
+
+// ttsNextPageCB
+//______________________________________________________________________________
+BookReader.prototype.ttsNextPageCB = function (data) {
+ this.ttsNextChunks = data;
+ if (soundManager.debugMode) console.log('preloaded next chunks.. data is ' + data);
+
+ if (true == this.ttsBuffering) {
+ if (soundManager.debugMode) console.log('ttsNextPageCB: ttsBuffering is true');
+ this.ttsBuffering = false;
+ }
+}
+
+// ttsLoadChunk
+//______________________________________________________________________________
+BookReader.prototype.ttsLoadChunk = function (page, pos, string) {
+ var snd = soundManager.createSound({
+ id: 'chunk'+page+'-'+pos,
+ url: 'http://'+this.server+'/BookReader/BookReaderGetTTS.php?string=' + escape(string) + '&format=.'+this.ttsFormat //the .ogg is to trick SoundManager2 to use the HTML5 audio player
+ });
+ snd.br = this;
+ snd.load()
+}
+
+
+// ttsNextChunk()
+//______________________________________________________________________________
+// This function into two parts: ttsNextChunk gets run before page flip animation
+// and ttsNextChunkPhase2 get run after page flip animation.
+// If a page flip is necessary, ttsAdvance() will return false so Phase2 isn't
+// called. Instead, this.animationFinishedCallback is set, so that Phase2
+// continues after animation is finished.
+
+BookReader.prototype.ttsNextChunk = function () {
+ if (soundManager.debugMode) console.log('nextchunk pos=' + this.ttsPosition);
+
+ if (-1 != this.ttsPosition) {
+ soundManager.destroySound('chunk'+this.ttsIndex+'-'+this.ttsPosition);
+ }
+
+ this.ttsRemoveHilites(); //remove old hilights
+
+ var moreToPlay = this.ttsAdvance();
+
+ if (moreToPlay) {
+ this.ttsNextChunkPhase2();
+ }
+
+ //This function is called again when ttsPlay() has finished playback.
+ //If the next chunk of text has not yet finished loading, ttsPlay()
+ //will start polling until the next chunk is ready.
+}
+
+// ttsNextChunkPhase2()
+//______________________________________________________________________________
+// page flip animation has now completed
+BookReader.prototype.ttsNextChunkPhase2 = function () {
+ if (null == this.ttsChunks) {
+ alert('error: ttsChunks is null?'); //TODO
+ return;
+ }
+
+ if (0 == this.ttsChunks.length) {
+ if (soundManager.debugMode) console.log('ttsNextChunk2: ttsChunks.length is zero.. hacking...');
+ this.ttsStartCB(this.ttsChunks);
+ return;
+ }
+
+ if (soundManager.debugMode) console.log('next chunk is ' + this.ttsPosition);
+
+ //prefetch next page of text
+ if (0 == this.ttsPosition) {
+ if (this.ttsIndex<(this.numLeafs-1)) {
+ this.ttsGetText(this.ttsIndex+1, 'ttsNextPageCB');
+ }
+ }
+
+ this.ttsPrefetchAudio();
+
+ this.ttsPlay();
+}
+
+// ttsAdvance()
+//______________________________________________________________________________
+// 1. advance ttsPosition
+// 2. if necessary, advance ttsIndex, and copy ttsNextChunks to ttsChunks
+// 3. if necessary, flip to current page, or scroll so chunk is visible
+// 4. do something smart is ttsNextChunks has not yet finished preloading (TODO)
+// 5. stop playing at end of book
+
+BookReader.prototype.ttsAdvance = function (starting) {
+ this.ttsPosition++;
+
+ if (this.ttsPosition >= this.ttsChunks.length) {
+
+ if (this.ttsIndex == (this.numLeafs-1)) {
+ if (soundManager.debugMode) console.log('tts stop');
+ return false;
+ } else {
+ if ((null != this.ttsNextChunks) || (starting)) {
+ if (soundManager.debugMode) console.log('moving to next page!');
+ this.ttsIndex++;
+ this.ttsPosition = 0;
+ this.ttsChunks = this.ttsNextChunks;
+ this.ttsNextChunks = null;
+
+ //A page flip might be necessary. This code is confusing since
+ //ttsNextChunks might be null if we are starting on a blank page.
+ if (2 == this.mode) {
+ if ((this.ttsIndex != this.twoPage.currentIndexL) && (this.ttsIndex != this.twoPage.currentIndexR)) {
+ if (!starting) {
+ this.animationFinishedCallback = this.ttsNextChunkPhase2;
+ this.next();
+ return false;
+ } else {
+ this.next();
+ return true;
+ }
+ } else {
+ return true;
+ }
+ }
+ } else {
+ if (soundManager.debugMode) console.log('ttsAdvance: ttsNextChunks is null');
+ return false;
+ }
+ }
+ }
+
+ return true;
+}
+
+// ttsPrefetchAudio()
+//______________________________________________________________________________
+BookReader.prototype.ttsPrefetchAudio = function () {
+
+ if(false != this.ttsBuffering) {
+ alert('TTS Error: prefetch() called while content still buffering!');
+ return;
+ }
+
+ //preload next chunk
+ var nextPos = this.ttsPosition+1;
+ if (nextPos < this.ttsChunks.length) {
+ this.ttsLoadChunk(this.ttsIndex, nextPos, this.ttsChunks[nextPos][0]);
+ } else {
+ //for a short page, preload might nt have yet returned..
+ if (soundManager.debugMode) console.log('preloading chunk 0 from next page, index='+(this.ttsIndex+1));
+ if (null != this.ttsNextChunks) {
+ if (0 != this.ttsNextChunks.length) {
+ this.ttsLoadChunk(this.ttsIndex+1, 0, this.ttsNextChunks[0][0]);
+ } else {
+ if (soundManager.debugMode) console.log('prefetchAudio(): ttsNextChunks is zero length!');
+ }
+ } else {
+ if (soundManager.debugMode) console.log('ttsNextChunks is null, not preloading next page');
+ this.ttsBuffering = true;
+ }
+ }
+
+}
+
+// ttsPlay()
+//______________________________________________________________________________
+BookReader.prototype.ttsPlay = function () {
+
+ var chunk = this.ttsChunks[this.ttsPosition];
+ if (soundManager.debugMode) {
+ console.log('ttsPlay position = ' + this.ttsPosition);
+ console.log('chunk = ' + chunk);
+ console.log(this.ttsChunks);
+ }
+
+ //add new hilights
+ if (2 == this.mode) {
+ this.ttsHilite2UP(chunk);
+ } else {
+ this.ttsHilite1UP(chunk);
+ }
+
+ this.ttsScrollToChunk(chunk);
+
+ //play current chunk
+ if (false == this.ttsBuffering) {
+ soundManager.play('chunk'+this.ttsIndex+'-'+this.ttsPosition,{onfinish:function(){br.ttsNextChunk();}});
+ } else {
+ soundManager.play('chunk'+this.ttsIndex+'-'+this.ttsPosition,{onfinish:function(){br.ttsStartPolling();}});
+ }
+}
+
+// scrollToChunk()
+//______________________________________________________________________________
+BookReader.prototype.ttsScrollToChunk = function(chunk) {
+ if (this.constMode1up != this.mode) return;
+
+ var leafTop = 0;
+ var h;
+ var i;
+ for (i=0; i<this.ttsIndex; i++) {
+ h = parseInt(this._getPageHeight(i)/this.reduce);
+ leafTop += h + this.padding;
+ }
+
+ var chunkTop = chunk[1][3]; //coords are in l,b,r,t order
+ var chunkBot = chunk[chunk.length-1][1];
+
+ var topOfFirstChunk = leafTop + chunkTop/this.reduce;
+ var botOfLastChunk = leafTop + chunkBot/this.reduce;
+
+ if (soundManager.debugMode) console.log('leafTop = ' + leafTop + ' topOfFirstChunk = ' + topOfFirstChunk + ' botOfLastChunk = ' + botOfLastChunk);
+
+ var containerTop = $('#BRcontainer').attr('scrollTop');
+ var containerBot = containerTop + $('#BRcontainer').height();
+ if (soundManager.debugMode) console.log('containerTop = ' + containerTop + ' containerBot = ' + containerBot);
+
+ if ((topOfFirstChunk < containerTop) || (botOfLastChunk > containerBot)) {
+ //jumpToIndex scrolls so that chunkTop is centered.. we want chunkTop at the top
+ //this.jumpToIndex(this.ttsIndex, null, chunkTop);
+ $('#BRcontainer').animate({scrollTop: topOfFirstChunk},'fast');
+ }
+}
+
+// ttsHilite1UP()
+//______________________________________________________________________________
+BookReader.prototype.ttsHilite1UP = function(chunk) {
+ var i;
+ for (i=1; i<chunk.length; i++) {
+ //each rect is an array of l,b,r,t coords (djvu.xml ordering...)
+ var l = chunk[i][0];
+ var b = chunk[i][1];
+ var r = chunk[i][2];
+ var t = chunk[i][3];
+
+ var div = document.createElement('div');
+ this.ttsHilites.push(div);
+ $(div).attr('className', 'BookReaderSearchHilite').appendTo('#pagediv'+this.ttsIndex);
+
+ $(div).css({
+ width: (r-l)/this.reduce + 'px',
+ height: (b-t)/this.reduce + 'px',
+ left: l/this.reduce + 'px',
+ top: t/this.reduce +'px'
+ });
+ }
+
+}
+
+// ttsHilite2UP()
+//______________________________________________________________________________
+BookReader.prototype.ttsHilite2UP = function (chunk) {
+ var i;
+ for (i=1; i<chunk.length; i++) {
+ //each rect is an array of l,b,r,t coords (djvu.xml ordering...)
+ var l = chunk[i][0];
+ var b = chunk[i][1];
+ var r = chunk[i][2];
+ var t = chunk[i][3];
+
+ var div = document.createElement('div');
+ this.ttsHilites.push(div);
+ $(div).attr('className', 'BookReaderSearchHilite').css('zIndex', 3).appendTo('#BRtwopageview');
+ this.setHilightCss2UP(div, this.ttsIndex, l, r, t, b);
+ }
+}
+
+// ttsRemoveHilites()
+//______________________________________________________________________________
+BookReader.prototype.ttsRemoveHilites = function (chunk) {
+ $(this.ttsHilites).remove();
+ this.ttsHilites = [];
+}
+
+// ttsStartPolling()
+//______________________________________________________________________________
+// Play of the current chunk has ended, but the next chunk has not yet been loaded.
+// We need to wait for the text for the next page to be loaded, so we can
+// load the next audio chunk
+BookReader.prototype.ttsStartPolling = function () {
+ if (soundManager.debugMode) console.log('Starting the TTS poller...');
+ var self = this;
+ this.ttsPoller=setInterval(function(){
+ if (self.ttsBuffering) {return;}
+
+ if (soundManager.debugMode) console.log('TTS buffering finished!');
+ clearInterval(self.ttsPoller);
+ self.ttsPoller = null;
+ self.ttsPrefetchAudio();
+ self.ttsNextChunk();
+ },500);
+}
projects / bookreader.git / blobdiff