function GnuBook() {
this.reduce = 4;
this.padding = 10;
- this.mode = 1; //1 or 2
+ this.mode = 1; //1, 2, 3
this.ui = 'full'; // UI mode
-
+ this.thumbScale = 10; // thumbnail default
+
this.displayedIndices = [];
+ this.displayedRows=[];
//this.indicesToDisplay = [];
this.imgs = {};
this.prefetchedImgs = {}; //an object with numeric keys cooresponding to page index
this.twoPagePopUp = null;
this.leafEdgeTmp = null;
this.embedPopup = null;
-
+
this.searchResults = {};
this.firstIndex = null;
GnuBook.prototype.init = function() {
var startIndex = undefined;
+ this.pageScale = this.reduce; // preserve current reduce
// Find start index and mode if set in location hash
var params = this.paramsFromFragment(window.location.hash);
e.data.updateSearchHilites(); //deletes hilights but does not call remove()
e.data.loadLeafs();
} else if (3 == e.data.mode){
- e.data.prepareThumbnailView;
+ e.data.prepareThumbnailView();
} else {
//console.log('drawing 2 page view');
this.jumpToIndex(startIndex);
} else if (3 == this.mode) {
this.firstIndex = startIndex;
- this.jumpToIndex(startIndex);
this.prepareThumbnailView();
+ this.jumpToIndex(startIndex);
} else {
//this.resizePageView();
//alert('drawing leafs!');
this.timer = null;
+ var viewWidth = $('#GBcontainer').attr('scrollWidth') - 20; // width minus buffer
+
+ //console.log('top=' + scrollTop + ' bottom='+scrollBottom);
- var scrollTop = $('#GBcontainer').attr('scrollTop');
+ var i;
+ var leafWidth;
+ var leafHeight;
+ var rightPos = 0;
+ var bottomPos = 0;
+ var maxRight = 0;
+ var currentRow = 0;
+ var leafIndex = 0;
+ var leafMap = [];
+
+ for (i=0; i<this.numLeafs; i++) {
+ leafWidth = parseInt(this.getPageWidth(i)/this.reduce, 10);
+ if (rightPos + (leafWidth + this.padding) > viewWidth){
+ currentRow++;
+ rightPos = 0;
+ leafIndex = 0;
+ }
+
+ if (leafMap[currentRow]===undefined) { leafMap[currentRow] = {}; }
+ if (leafMap[currentRow].leafs===undefined) {
+ leafMap[currentRow].leafs = [];
+ leafMap[currentRow].height = 0;
+ leafMap[currentRow].top = 0;
+ }
+ leafMap[currentRow].leafs[leafIndex] = {};
+ leafMap[currentRow].leafs[leafIndex].num = i;
+ leafMap[currentRow].leafs[leafIndex].left = rightPos;
+
+ leafHeight = parseInt(this.getPageHeight(leafMap[currentRow].leafs[leafIndex].num)/this.reduce, 10);
+ if (leafHeight > leafMap[currentRow].height) { leafMap[currentRow].height = leafHeight; }
+ if (leafIndex===0) { bottomPos += this.padding + leafMap[currentRow].height; }
+ rightPos += leafWidth + this.padding;
+ if (rightPos > maxRight) { maxRight = rightPos; }
+ leafIndex++;
+ }
+
+ // reset the bottom position based on thumbnails
+ $('#GBpageview').height(bottomPos);
+
+ var pageViewBuffer = Math.floor(($('#GBcontainer').attr('scrollWidth') - maxRight) / 2) - 14;
+ var scrollTop = $('#GBcontainer').attr('scrollTop');
var scrollBottom = scrollTop + $('#GBcontainer').height();
- //console.log('top=' + scrollTop + ' bottom='+scrollBottom);
-
- var indicesToDisplay = [];
-
- var i;
- var leafTop = 0;
- var leafBottom = 0;
- var viewHeight = 0;
- var width = 0;
- for (i=0; i<this.numLeafs; i++) {
- var height = parseInt(this.getPageHeight(i)/this.thumbScale);
-
- leafBottom += height;
- //console.log('leafTop = '+leafTop+ ' pageH = ' + this.pageH[i] + 'leafTop>=scrollTop=' + (leafTop>=scrollTop));
+
+ var leafTop = 0;
+ var leafBottom = 0;
+ var rowsToDisplay = [];
+
+ for (i=0; i<leafMap.length; i++) {
+ leafBottom += this.padding + leafMap[i].height;
var topInView = (leafTop >= scrollTop) && (leafTop <= scrollBottom);
var bottomInView = (leafBottom >= scrollTop) && (leafBottom <= scrollBottom);
var middleInView = (leafTop <=scrollTop) && (leafBottom>=scrollBottom);
if (topInView | bottomInView | middleInView) {
- //console.log('displayed: ' + this.displayedIndices);
- //console.log('to display: ' + i);
- indicesToDisplay.push(i);
+ //console.log('row to display: ' + j);
+ rowsToDisplay.push(i);
}
- leafTop += height +10;
- leafBottom += 10;
+ if(leafTop > leafMap[i].top) { leafMap[i].top = leafTop; }
+ leafTop = leafBottom;
}
+
+ var firstRow = rowsToDisplay[0];
+ var lastRow = rowsToDisplay[rowsToDisplay.length-1];
+ var rowBuffer = 4;
+ for (i=1; i<rowBuffer+1; i++) {
+ if (firstRow-i >= 0) { rowsToDisplay.unshift(firstRow-i); }
+ if (lastRow+i < leafMap.length) { rowsToDisplay.push(lastRow+i); }
+ }
- var firstIndexToDraw = indicesToDisplay[0];
- this.firstIndex = firstIndexToDraw;
-
// Update hash, but only if we're currently displaying a leaf
// Hack that fixes #365790
- if (this.displayedIndices.length > 0) {
+ if (this.displayedRows.length > 0) {
this.updateLocationHash();
}
- if ((0 != firstIndexToDraw) && (1 < this.reduce)) {
- firstIndexToDraw--;
- indicesToDisplay.unshift(firstIndexToDraw);
- }
-
- var lastIndexToDraw = indicesToDisplay[indicesToDisplay.length-1];
- if ( ((this.numLeafs-1) != lastIndexToDraw) && (1 < this.reduce) ) {
- indicesToDisplay.push(lastIndexToDraw+1);
- }
-
- leafTop = 0;
- var i;
- for (i=0; i<firstIndexToDraw; i++) {
- leafTop += parseInt(this.getPageHeight(i)/this.thumbScale) +10;
- }
-
- //var viewWidth = $('#GBpageview').width(); //includes scroll bar width
- var viewWidth = $('#GBcontainer').attr('scrollWidth');
-
-
- for (i=0; i<indicesToDisplay.length; i++) {
- var index = indicesToDisplay[i];
- var height = parseInt(this.getPageHeight(index)/this.thumbScale);
-
- if(-1 == jQuery.inArray(indicesToDisplay[i], this.displayedIndices)) {
- var width = parseInt(this.getPageWidth(index)/this.thumbScale);
- //console.log("displaying leaf " + indicesToDisplay[i] + ' leafTop=' +leafTop);
- var div = document.createElement("div");
- div.className = 'GBpagediv1up';
- div.id = 'pagediv'+index;
- div.style.position = "absolute";
- $(div).css('top', leafTop + 'px');
- var left = (viewWidth-width)>>1;
- if (left<0) left = 0;
- $(div).css('left', left+'px');
- $(div).css('width', width+'px');
- $(div).css('height', height+'px');
- //$(div).text('loading...');
-
- // thumbnails are hyperlinked, do not need drag handler
- //this.setDragHandler(div);
-
- // link to page in single page mode
- var link = document.createElement("a");
- link.href = '#page/' + (this.getPageNum(index)) +'/mode/1up' ;
- $(div).append(link);
-
- $('#GBpageview').append(div);
-
- var img = document.createElement("img");
- img.src = this.getPageURI(index);
- $(img).css('width', width+'px');
- $(img).css('height', height+'px');
- img.style.border = "0";
- $(link).append(img);
-
-
- } else {
- //console.log("not displaying " + indicesToDisplay[i] + ' score=' + jQuery.inArray(indicesToDisplay[i], this.displayedIndices));
- }
-
- leafTop += height +10;
-
- }
-
- for (i=0; i<this.displayedIndices.length; i++) {
- if (-1 == jQuery.inArray(this.displayedIndices[i], indicesToDisplay)) {
- var index = this.displayedIndices[i];
- //console.log('Removing leaf ' + index);
- //console.log('id='+'#pagediv'+index+ ' top = ' +$('#pagediv'+index).css('top'));
- $('#pagediv'+index).remove();
- } else {
- //console.log('NOT Removing leaf ' + this.displayedIndices[i]);
- }
- }
-
- this.displayedIndices = indicesToDisplay.slice();
- this.updateSearchHilites();
-
- if (null != this.getPageNum(firstIndexToDraw)) {
+ var j;
+ var row;
+ var left;
+ var index;
+ var div;
+ var link;
+ var img;
+ for (i=0; i<rowsToDisplay.length; i++) {
+ if (-1 == jQuery.inArray(rowsToDisplay[i], this.displayedRows)) {
+ row = rowsToDisplay[i];
+
+
+ for (j=0; j<leafMap[row].leafs.length; j++) {
+ index = leafMap[row].leafs[j].num;
+
+ leafWidth = parseInt(this.getPageWidth(index)/this.reduce, 10);
+ leafHeight = parseInt(this.getPageHeight(index)/this.reduce, 10);
+ leafTop = leafMap[row].top;
+ left = leafMap[row].leafs[j].left + pageViewBuffer;
+
+ div = document.createElement("div");
+ div.id = 'pagediv'+index;
+ div.style.position = "absolute";
+ div.className = "GBpagedivthumb";
+
+ left += this.padding;
+ $(div).css('top', leafTop + 'px');
+ $(div).css('left', left+'px');
+ $(div).css('width', leafWidth+'px');
+ $(div).css('height', leafHeight+'px');
+ //$(div).text('loading...');
+
+ // link to page in single page mode
+ link = document.createElement("a");
+ link.href = '#page/' + (this.getPageNum(index)) +'/mode/1up' ;
+ $(div).append(link);
+
+ $('#GBpageview').append(div);
+
+ img = document.createElement("img");
+ img.src = this.getPageURI(index);
+ $(img).css('width', leafWidth+'px');
+ $(img).css('height', leafHeight+'px');
+ img.style.border = "0";
+ $(link).append(img);
+ //console.log('displaying thumbnail: ' + leafMap[j]);
+ }
+ }
+ }
+
+
+ // remove previous highlights
+ if ($('.GBpagedivthumb_highlight').length>0) {
+ div = $('.GBpagedivthumb_highlight')
+ div.attr({className: 'GBpagedivthumb' });
+ }
+ // highlight current page
+ $('#pagediv'+this.currentIndex()).attr({className: 'GBpagedivthumb_highlight' });
+
+ var k;
+ for (i=0; i<this.displayedRows.length; i++) {
+ if (-1 == jQuery.inArray(this.displayedRows[i], rowsToDisplay)) {
+ row = this.displayedRows[i];
+ for (k=0; k<leafMap[row].leafs.length; k++) {
+ index = leafMap[row].leafs[k].num;
+ //console.log('Removing leaf ' + index);
+ $('#pagediv'+index).remove();
+ }
+ } else {
+
+ //console.log('NOT Removing leaf ' + this.displayedIndices[i]);
+ }
+ }
+
+ this.displayedRows = rowsToDisplay.slice();
+
+ if (null !== this.getPageNum(this.currentIndex())) {
$("#GBpagenum").val(this.getPageNum(this.currentIndex()));
} else {
$("#GBpagenum").val('');
}
- this.updateToolbarZoom(this.reduce);
-
+ this.updateToolbarZoom(this.reduce);
}
// drawLeafsTwoPage()
return this.zoom1up(direction);
case this.constMode2up:
return this.zoom2up(direction);
- case this.constModeThumb:
- return this.zoomThumb(direction);
}
}
if (this.reduce >= 8) return;
this.reduce*=2; //zoom out
}
-
+
+ this.pageScale = this.reduce; // preserve current reduce
this.resizePageView();
$('#GBpageview').empty()
this.updateToolbarZoom(this.reduce);
}
-// zoomThumb(dir)
-//______________________________________________________________________________
-GnuBook.prototype.zoomThumb = function(dir) {
- if (3 == this.mode) { //can only zoom in 1-page mode
- this.switchMode(1);
- return;
- }
-}
-
// resizePageView()
//______________________________________________________________________________
GnuBook.prototype.resizePageView = function() {
}
this.twoPage.autofit = newZoom.autofit;
this.reduce = newZoom.reduce;
-
+ this.pageScale = this.reduce; // preserve current reduce
+
// Preserve view center position
var oldCenter = this.twoPageGetViewCenter();
this.flipFwdToIndex(index);
}
- } else {
+ } else if (3 == this.mode){
+ var viewWidth = $('#GBcontainer').attr('scrollWidth') - 20; // width minus buffer
+ var i;
+ var leafWidth = 0;
+ var leafHeight = 0;
+ var rightPos = 0;
+ var bottomPos = 0;
+ var rowHeight = 0;
+ var leafTop = 0;
+ var leafIndex = 0;
+
+ for (i=0; i<(index+1); i++) {
+ leafWidth = parseInt(this.getPageWidth(i)/this.reduce, 10);
+ if (rightPos + (leafWidth + this.padding) > viewWidth){
+ rightPos = 0;
+ rowHeight = 0;
+ leafIndex = 0;
+ }
+ leafHeight = parseInt(this.getPageHeight(i)/this.reduce, 10);
+ if(leafHeight > rowHeight) { rowHeight = leafHeight; }
+ if (leafIndex==0) { leafTop = bottomPos; }
+ if (leafIndex==0) { bottomPos += this.padding + rowHeight; }
+ rightPos += leafWidth + this.padding;
+ leafIndex++;
+ }
+ this.firstIndex=index;
+ if ($('#GBcontainer').attr('scrollTop') == leafTop) {
+ this.loadLeafs();
+ } else {
+ $('#GBcontainer').animate({scrollTop: leafTop },'fast');
+ }
+ } else {
var i;
var leafTop = 0;
var h;
this.removeSearchHilites();
this.mode = mode;
-
this.switchToolbarMode(mode);
+
+ // reinstate scale if moving from thumbnail view
+ if (this.pageScale != this.reduce) this.reduce = this.pageScale;
// $$$ TODO preserve center of view when switching between mode
// See https://bugs.edge.launchpad.net/gnubook/+bug/416682
-
+
if (1 == mode) {
this.reduce = this.quantizeReduce(this.reduce);
this.prepareOnePageView();
} else if (3 == mode) {
this.reduce = this.quantizeReduce(this.reduce);
this.prepareThumbnailView();
+ this.jumpToIndex(this.currentIndex());
} else {
this.twoPage.autofit = false; // Take zoom level from other mode
this.reduce = this.quantizeReduce(this.reduce);
//prepareThumbnailView()
//______________________________________________________________________________
GnuBook.prototype.prepareThumbnailView = function() {
-
+
// var startLeaf = this.displayedIndices[0];
var startLeaf = this.currentIndex();
-
+ this.reduce = this.thumbScale;
+
$('#GBcontainer').empty();
$('#GBcontainer').css({
overflowY: 'scroll',
this.resizePageView();
- this.jumpToIndex(startLeaf);
- this.displayedIndices = [];
-
+ this.displayedRows = [];
this.drawLeafsThumbnail();
// Bind mouse handlers
// E.g paramsFromFragment(window.location.hash)
GnuBook.prototype.paramsFromFragment = function(urlFragment) {
// URL fragment syntax specification: http://openlibrary.org/dev/docs/bookurls
-
+
var params = {};
// For convenience we allow an initial # character (as from window.location.hash)
params.mode = this.constMode1up;
} else if ('2up' == urlHash['mode']) {
params.mode = this.constMode2up;
- } else if ('Thumb' == urlHash['mode']) {
+ } else if ('thumb' == urlHash['mode']) {
params.mode = this.constModeThumb;
}
// See http://openlibrary.org/dev/docs/bookurls for an explanation of the fragment syntax.
GnuBook.prototype.fragmentFromParams = function(params) {
var separator = '/';
-
+
var fragments = [];
if ('undefined' != typeof(params.page)) {
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