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Convert the text layer builder to a class

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This commit is contained in:
Tim van der Meij 2014-06-23 22:02:33 +02:00
parent 2a052c4aad
commit a968da8887
1 changed files with 285 additions and 280 deletions
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37
web/text_layer_builder.js
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@ -28,7 +28,8 @@ var RENDER_DELAY = 200; // ms
* contain text that matches the PDF text they are overlaying. This object
* also provides a way to highlight text that is being searched for.
*/
var TextLayerBuilder = function textLayerBuilder(options) {
var TextLayerBuilder = (function TextLayerBuilderClosure() {
function TextLayerBuilder(options) {
this.textLayerDiv = options.textLayerDiv;
this.layoutDone = false;
this.divContentDone = false;
@ -42,8 +43,10 @@ var TextLayerBuilder = function textLayerBuilder(options) {
if (typeof PDFFindController === 'undefined') {
window.PDFFindController = null;
}
}
this.renderLayer = function textLayerBuilder_renderLayer() {
TextLayerBuilder.prototype = {
renderLayer: function TextLayerBuilder_renderLayer() {
var textLayerFrag = document.createDocumentFragment();
var textDivs = this.textDivs;
var textDivsLength = textDivs.length;
@ -78,10 +81,10 @@ var TextLayerBuilder = function textLayerBuilder(options) {
this.textLayerDiv.appendChild(textLayerFrag);
this.renderingDone = true;
this.updateMatches();
};
},
this.setupRenderLayoutTimer =
function textLayerBuilder_setupRenderLayoutTimer() {
setupRenderLayoutTimer:
function TextLayerBuilder_setupRenderLayoutTimer() {
// Schedule renderLayout() if the user has been scrolling,
// otherwise run it right away.
var self = this;
@ -98,9 +101,9 @@ var TextLayerBuilder = function textLayerBuilder(options) {
self.setupRenderLayoutTimer();
}, RENDER_DELAY);
}
};
},
this.appendText = function textLayerBuilder_appendText(geom, styles) {
appendText: function TextLayerBuilder_appendText(geom, styles) {
var style = styles[geom.fontName];
var textDiv = document.createElement('div');
this.textDivs.push(textDiv);
@ -131,9 +134,9 @@ var TextLayerBuilder = function textLayerBuilder(options) {
} else {
textDiv.dataset.canvasWidth = geom.width * this.viewport.scale;
}
};
},
this.setTextContent = function textLayerBuilder_setTextContent(textContent) {
setTextContent: function TextLayerBuilder_setTextContent(textContent) {
this.textContent = textContent;
var textItems = textContent.items;
@ -142,9 +145,9 @@ var TextLayerBuilder = function textLayerBuilder(options) {
}
this.divContentDone = true;
this.setupRenderLayoutTimer();
};
},
this.convertMatches = function textLayerBuilder_convertMatches(matches) {
convertMatches: function TextLayerBuilder_convertMatches(matches) {
var i = 0;
var iIndex = 0;
var bidiTexts = this.textContent.items;
@ -192,9 +195,9 @@ var TextLayerBuilder = function textLayerBuilder(options) {
}
return ret;
};
},
this.renderMatches = function textLayerBuilder_renderMatches(matches) {
renderMatches: function TextLayerBuilder_renderMatches(matches) {
// Early exit if there is nothing to render.
if (matches.length === 0) {
return;
@ -285,9 +288,9 @@ var TextLayerBuilder = function textLayerBuilder(options) {
if (prevEnd) {
appendTextToDiv(prevEnd.divIdx, prevEnd.offset, infinity.offset);
}
};
},
this.updateMatches = function textLayerBuilder_updateMatches() {
updateMatches: function TextLayerBuilder_updateMatches() {
// Only show matches when all rendering is done.
if (!this.renderingDone) {
return;
@ -320,6 +323,8 @@ var TextLayerBuilder = function textLayerBuilder(options) {
this.matches = this.convertMatches(PDFFindController === null ?
[] : (PDFFindController.pageMatches[this.pageIdx] || []));
this.renderMatches(this.matches);
}
};
};
return TextLayerBuilder;
})();