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Merge pull request #3663 from Snuffleupagus/move-PageView

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Move PageView from viewer.js to its own file
This commit is contained in:
Tim van der Meij 2013-09-20 10:52:21 -07:00
commit 31fda50123
3 changed files with 578 additions and 549 deletions
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web/page_view.js Normal file
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@ -0,0 +1,573 @@
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2012 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* globals RenderingStates, PDFView, PDFHistory, PDFFindBar, PDFJS, mozL10n,
CustomStyle, scrollIntoView, SCROLLBAR_PADDING, CSS_UNITS,
UNKNOWN_SCALE, DEFAULT_SCALE, getOutputScale, TextLayerBuilder,
cache, Stats */
'use strict';
var PageView = function pageView(container, id, scale,
navigateTo, defaultViewport) {
this.id = id;
this.rotation = 0;
this.scale = scale || 1.0;
this.viewport = defaultViewport;
this.pdfPageRotate = defaultViewport.rotate;
this.renderingState = RenderingStates.INITIAL;
this.resume = null;
this.textContent = null;
this.textLayer = null;
this.annotationLayer = null;
var anchor = document.createElement('a');
anchor.name = '' + this.id;
var div = this.el = document.createElement('div');
div.id = 'pageContainer' + this.id;
div.className = 'page';
div.style.width = Math.floor(this.viewport.width) + 'px';
div.style.height = Math.floor(this.viewport.height) + 'px';
container.appendChild(anchor);
container.appendChild(div);
this.setPdfPage = function pageViewSetPdfPage(pdfPage) {
this.pdfPage = pdfPage;
this.pdfPageRotate = pdfPage.rotate;
this.viewport = pdfPage.getViewport(this.scale);
this.stats = pdfPage.stats;
this.update();
};
this.destroy = function pageViewDestroy() {
this.update();
if (this.pdfPage) {
this.pdfPage.destroy();
}
};
this.update = function pageViewUpdate(scale, rotation) {
if (this.renderTask) {
this.renderTask.cancel();
}
this.resume = null;
this.renderingState = RenderingStates.INITIAL;
if (typeof rotation !== 'undefined') {
this.rotation = rotation;
}
this.scale = scale || this.scale;
var totalRotation = (this.rotation + this.pdfPageRotate) % 360;
this.viewport = this.viewport.clone({
scale: this.scale,
rotation: totalRotation
});
div.style.width = Math.floor(this.viewport.width) + 'px';
div.style.height = Math.floor(this.viewport.height) + 'px';
while (div.hasChildNodes()) {
div.removeChild(div.lastChild);
}
div.removeAttribute('data-loaded');
this.annotationLayer = null;
delete this.canvas;
this.loadingIconDiv = document.createElement('div');
this.loadingIconDiv.className = 'loadingIcon';
div.appendChild(this.loadingIconDiv);
};
Object.defineProperty(this, 'width', {
get: function PageView_getWidth() {
return this.viewport.width;
},
enumerable: true
});
Object.defineProperty(this, 'height', {
get: function PageView_getHeight() {
return this.viewport.height;
},
enumerable: true
});
var self = this;
function setupAnnotations(pageDiv, pdfPage, viewport) {
function bindLink(link, dest) {
link.href = PDFView.getDestinationHash(dest);
link.onclick = function pageViewSetupLinksOnclick() {
if (dest) {
PDFView.navigateTo(dest);
}
return false;
};
link.className = 'internalLink';
}
function bindNamedAction(link, action) {
link.href = PDFView.getAnchorUrl('');
link.onclick = function pageViewSetupNamedActionOnClick() {
// See PDF reference, table 8.45 - Named action
switch (action) {
case 'GoToPage':
document.getElementById('pageNumber').focus();
break;
case 'GoBack':
PDFHistory.back();
break;
case 'GoForward':
PDFHistory.forward();
break;
case 'Find':
if (!PDFView.supportsIntegratedFind) {
PDFFindBar.toggle();
}
break;
case 'NextPage':
PDFView.page++;
break;
case 'PrevPage':
PDFView.page--;
break;
case 'LastPage':
PDFView.page = PDFView.pages.length;
break;
case 'FirstPage':
PDFView.page = 1;
break;
default:
break; // No action according to spec
}
return false;
};
link.className = 'internalLink';
}
pdfPage.getAnnotations().then(function(annotationsData) {
if (self.annotationLayer) {
// If an annotationLayer already exists, delete it to avoid creating
// duplicate annotations when rapidly re-zooming the document.
pageDiv.removeChild(self.annotationLayer);
self.annotationLayer = null;
}
viewport = viewport.clone({ dontFlip: true });
for (var i = 0; i < annotationsData.length; i++) {
var data = annotationsData[i];
var annotation = PDFJS.Annotation.fromData(data);
if (!annotation || !annotation.hasHtml()) {
continue;
}
var element = annotation.getHtmlElement(pdfPage.commonObjs);
mozL10n.translate(element);
data = annotation.getData();
var rect = data.rect;
var view = pdfPage.view;
rect = PDFJS.Util.normalizeRect([
rect[0],
view[3] - rect[1] + view[1],
rect[2],
view[3] - rect[3] + view[1]
]);
element.style.left = rect[0] + 'px';
element.style.top = rect[1] + 'px';
element.style.position = 'absolute';
var transform = viewport.transform;
var transformStr = 'matrix(' + transform.join(',') + ')';
CustomStyle.setProp('transform', element, transformStr);
var transformOriginStr = -rect[0] + 'px ' + -rect[1] + 'px';
CustomStyle.setProp('transformOrigin', element, transformOriginStr);
if (data.subtype === 'Link' && !data.url) {
if (data.action) {
bindNamedAction(element, data.action);
} else {
bindLink(element, ('dest' in data) ? data.dest : null);
}
}
if (!self.annotationLayer) {
var annotationLayerDiv = document.createElement('div');
annotationLayerDiv.className = 'annotationLayer';
pageDiv.appendChild(annotationLayerDiv);
self.annotationLayer = annotationLayerDiv;
}
self.annotationLayer.appendChild(element);
}
});
}
this.getPagePoint = function pageViewGetPagePoint(x, y) {
return this.viewport.convertToPdfPoint(x, y);
};
this.scrollIntoView = function pageViewScrollIntoView(dest) {
if (PDFView.isPresentationMode) { // Avoid breaking presentation mode.
dest = null;
}
if (!dest) {
scrollIntoView(div);
return;
}
var x = 0, y = 0;
var width = 0, height = 0, widthScale, heightScale;
var scale = 0;
switch (dest[1].name) {
case 'XYZ':
x = dest[2];
y = dest[3];
scale = dest[4];
// If x and/or y coordinates are not supplied, default to
// _top_ left of the page (not the obvious bottom left,
// since aligning the bottom of the intended page with the
// top of the window is rarely helpful).
x = x !== null ? x : 0;
y = y !== null ? y : this.height / this.scale;
break;
case 'Fit':
case 'FitB':
scale = 'page-fit';
break;
case 'FitH':
case 'FitBH':
y = dest[2];
scale = 'page-width';
break;
case 'FitV':
case 'FitBV':
x = dest[2];
scale = 'page-height';
break;
case 'FitR':
x = dest[2];
y = dest[3];
width = dest[4] - x;
height = dest[5] - y;
widthScale = (PDFView.container.clientWidth - SCROLLBAR_PADDING) /
width / CSS_UNITS;
heightScale = (PDFView.container.clientHeight - SCROLLBAR_PADDING) /
height / CSS_UNITS;
scale = Math.min(widthScale, heightScale);
break;
default:
return;
}
if (scale && scale !== PDFView.currentScale) {
PDFView.parseScale(scale, true, true);
} else if (PDFView.currentScale === UNKNOWN_SCALE) {
PDFView.parseScale(DEFAULT_SCALE, true, true);
}
if (scale === 'page-fit' && !dest[4]) {
scrollIntoView(div);
return;
}
var boundingRect = [
this.viewport.convertToViewportPoint(x, y),
this.viewport.convertToViewportPoint(x + width, y + height)
];
setTimeout(function pageViewScrollIntoViewRelayout() {
// letting page to re-layout before scrolling
var scale = PDFView.currentScale;
var x = Math.min(boundingRect[0][0], boundingRect[1][0]);
var y = Math.min(boundingRect[0][1], boundingRect[1][1]);
var width = Math.abs(boundingRect[0][0] - boundingRect[1][0]);
var height = Math.abs(boundingRect[0][1] - boundingRect[1][1]);
scrollIntoView(div, {left: x, top: y, width: width, height: height});
}, 0);
};
this.getTextContent = function pageviewGetTextContent() {
if (!this.textContent) {
this.textContent = this.pdfPage.getTextContent();
}
return this.textContent;
};
this.draw = function pageviewDraw(callback) {
var pdfPage = this.pdfPage;
if (!pdfPage) {
var promise = PDFView.getPage(this.id);
promise.then(function(pdfPage) {
this.setPdfPage(pdfPage);
this.draw(callback);
}.bind(this));
return;
}
if (this.renderingState !== RenderingStates.INITIAL) {
console.error('Must be in new state before drawing');
}
this.renderingState = RenderingStates.RUNNING;
var viewport = this.viewport;
// Wrap the canvas so if it has a css transform for highdpi the overflow
// will be hidden in FF.
var canvasWrapper = document.createElement('div');
canvasWrapper.style.width = div.style.width;
canvasWrapper.style.height = div.style.height;
canvasWrapper.classList.add('canvasWrapper');
var canvas = document.createElement('canvas');
canvas.id = 'page' + this.id;
canvasWrapper.appendChild(canvas);
div.appendChild(canvasWrapper);
this.canvas = canvas;
var scale = this.scale;
var outputScale = getOutputScale();
canvas.width = Math.floor(viewport.width) * outputScale.sx;
canvas.height = Math.floor(viewport.height) * outputScale.sy;
var textLayerDiv = null;
if (!PDFJS.disableTextLayer) {
textLayerDiv = document.createElement('div');
textLayerDiv.className = 'textLayer';
textLayerDiv.style.width = canvas.width + 'px';
textLayerDiv.style.height = canvas.height + 'px';
div.appendChild(textLayerDiv);
}
var textLayer = this.textLayer =
textLayerDiv ? new TextLayerBuilder({
textLayerDiv: textLayerDiv,
pageIndex: this.id - 1,
lastScrollSource: PDFView,
viewport: this.viewport,
isViewerInPresentationMode: PDFView.isPresentationMode
}) : null;
if (outputScale.scaled) {
var cssScale = 'scale(' + (1 / outputScale.sx) + ', ' +
(1 / outputScale.sy) + ')';
CustomStyle.setProp('transform' , canvas, cssScale);
CustomStyle.setProp('transformOrigin' , canvas, '0% 0%');
if (textLayerDiv) {
CustomStyle.setProp('transform' , textLayerDiv, cssScale);
CustomStyle.setProp('transformOrigin' , textLayerDiv, '0% 0%');
}
}
var ctx = canvas.getContext('2d');
// TODO(mack): use data attributes to store these
ctx._scaleX = outputScale.sx;
ctx._scaleY = outputScale.sy;
if (outputScale.scaled) {
ctx.scale(outputScale.sx, outputScale.sy);
}
//#if (FIREFOX || MOZCENTRAL)
// // Checking if document fonts are used only once
// var checkIfDocumentFontsUsed = !PDFView.pdfDocument.embeddedFontsUsed;
//#endif
// Rendering area
var self = this;
function pageViewDrawCallback(error) {
// The renderTask may have been replaced by a new one, so only remove the
// reference to the renderTask if it matches the one that is triggering
// this callback.
if (renderTask === self.renderTask) {
self.renderTask = null;
}
if (error === 'cancelled') {
return;
}
self.renderingState = RenderingStates.FINISHED;
if (self.loadingIconDiv) {
div.removeChild(self.loadingIconDiv);
delete self.loadingIconDiv;
}
//#if (FIREFOX || MOZCENTRAL)
// if (checkIfDocumentFontsUsed && PDFView.pdfDocument.embeddedFontsUsed &&
// PDFJS.disableFontFace) {
// console.error(mozL10n.get('web_fonts_disabled', null,
// 'Web fonts are disabled: unable to use embedded PDF fonts.'));
// PDFView.fallback();
// }
// if (self.textLayer && self.textLayer.textDivs &&
// self.textLayer.textDivs.length > 0 &&
// !PDFView.supportsDocumentColors) {
// console.error(mozL10n.get('document_colors_disabled', null,
// 'PDF documents are not allowed to use their own colors: ' +
// '\'Allow pages to choose their own colors\' ' +
// 'is deactivated in the browser.'));
// PDFView.fallback();
// }
//#endif
if (error) {
PDFView.error(mozL10n.get('rendering_error', null,
'An error occurred while rendering the page.'), error);
}
self.stats = pdfPage.stats;
self.updateStats();
if (self.onAfterDraw) {
self.onAfterDraw();
}
cache.push(self);
var event = document.createEvent('CustomEvent');
event.initCustomEvent('pagerender', true, true, {
pageNumber: pdfPage.pageNumber
});
div.dispatchEvent(event);
//#if (FIREFOX || MOZCENTRAL)
// FirefoxCom.request('reportTelemetry', JSON.stringify({
// type: 'pageInfo'
// }));
// // TODO add stream types report here
//#endif
callback();
}
var renderContext = {
canvasContext: ctx,
viewport: this.viewport,
textLayer: textLayer,
continueCallback: function pdfViewcContinueCallback(cont) {
if (PDFView.highestPriorityPage !== 'page' + self.id) {
self.renderingState = RenderingStates.PAUSED;
self.resume = function resumeCallback() {
self.renderingState = RenderingStates.RUNNING;
cont();
};
return;
}
cont();
}
};
var renderTask = this.renderTask = this.pdfPage.render(renderContext);
this.renderTask.then(
function pdfPageRenderCallback() {
pageViewDrawCallback(null);
},
function pdfPageRenderError(error) {
pageViewDrawCallback(error);
}
);
if (textLayer) {
this.getTextContent().then(
function textContentResolved(textContent) {
textLayer.setTextContent(textContent);
}
);
}
setupAnnotations(div, pdfPage, this.viewport);
div.setAttribute('data-loaded', true);
};
this.beforePrint = function pageViewBeforePrint() {
var pdfPage = this.pdfPage;
var viewport = pdfPage.getViewport(1);
// Use the same hack we use for high dpi displays for printing to get better
// output until bug 811002 is fixed in FF.
var PRINT_OUTPUT_SCALE = 2;
var canvas = this.canvas = document.createElement('canvas');
canvas.width = Math.floor(viewport.width) * PRINT_OUTPUT_SCALE;
canvas.height = Math.floor(viewport.height) * PRINT_OUTPUT_SCALE;
canvas.style.width = (PRINT_OUTPUT_SCALE * viewport.width) + 'pt';
canvas.style.height = (PRINT_OUTPUT_SCALE * viewport.height) + 'pt';
var cssScale = 'scale(' + (1 / PRINT_OUTPUT_SCALE) + ', ' +
(1 / PRINT_OUTPUT_SCALE) + ')';
CustomStyle.setProp('transform' , canvas, cssScale);
CustomStyle.setProp('transformOrigin' , canvas, '0% 0%');
var printContainer = document.getElementById('printContainer');
printContainer.appendChild(canvas);
var self = this;
canvas.mozPrintCallback = function(obj) {
var ctx = obj.context;
ctx.save();
ctx.fillStyle = 'rgb(255, 255, 255)';
ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.restore();
ctx.scale(PRINT_OUTPUT_SCALE, PRINT_OUTPUT_SCALE);
var renderContext = {
canvasContext: ctx,
viewport: viewport
};
pdfPage.render(renderContext).then(function() {
// Tell the printEngine that rendering this canvas/page has finished.
obj.done();
self.pdfPage.destroy();
}, function(error) {
console.error(error);
// Tell the printEngine that rendering this canvas/page has failed.
// This will make the print proces stop.
if ('abort' in obj) {
obj.abort();
} else {
obj.done();
}
self.pdfPage.destroy();
});
};
};
this.updateStats = function pageViewUpdateStats() {
if (!this.stats) {
return;
}
if (PDFJS.pdfBug && Stats.enabled) {
var stats = this.stats;
Stats.add(this.id, stats);
}
};
};

3
web/viewer.html
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@ -60,12 +60,13 @@ limitations under the License.
<!--#if !PRODUCTION-->
<script type="text/javascript" src="ui_utils.js"></script>
<script type="text/javascript" src="download_manager.js"></script>
<script type="text/javascript" src="page_view.js"></script>
<script type="text/javascript" src="thumbnail_view.js"></script>
<script type="text/javascript" src="text_layer_builder.js"></script>
<script type="text/javascript" src="pdf_find_bar.js"></script>
<script type="text/javascript" src="pdf_find_controller.js"></script>
<script type="text/javascript" src="pdf_history.js"></script>
<script type="text/javascript" src="secondary_toolbar.js"></script>
<script type="text/javascript" src="secondary_toolbar.js"></script>
<!--#endif-->
<script type="text/javascript" src="debugger.js"></script>

551
web/viewer.js
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@ -17,7 +17,8 @@
/* globals PDFJS, PDFBug, FirefoxCom, Stats, Cache, PDFFindBar, CustomStyle,
PDFFindController, ProgressBar, TextLayerBuilder, DownloadManager,
getFileName, getOutputScale, scrollIntoView, getPDFFileNameFromURL,
PDFHistory, ThumbnailView, noContextMenuHandler, SecondaryToolbar */
PDFHistory, PageView, ThumbnailView, noContextMenuHandler,
SecondaryToolbar */
'use strict';
@ -1568,553 +1569,7 @@ var PDFView = {
}
};
var PageView = function pageView(container, id, scale,
navigateTo, defaultViewport) {
this.id = id;
this.rotation = 0;
this.scale = scale || 1.0;
this.viewport = defaultViewport;
this.pdfPageRotate = defaultViewport.rotate;
this.renderingState = RenderingStates.INITIAL;
this.resume = null;
this.textContent = null;
this.textLayer = null;
this.annotationLayer = null;
var anchor = document.createElement('a');
anchor.name = '' + this.id;
var div = this.el = document.createElement('div');
div.id = 'pageContainer' + this.id;
div.className = 'page';
div.style.width = Math.floor(this.viewport.width) + 'px';
div.style.height = Math.floor(this.viewport.height) + 'px';
container.appendChild(anchor);
container.appendChild(div);
this.setPdfPage = function pageViewSetPdfPage(pdfPage) {
this.pdfPage = pdfPage;
this.pdfPageRotate = pdfPage.rotate;
this.viewport = pdfPage.getViewport(this.scale);
this.stats = pdfPage.stats;
this.update();
};
this.destroy = function pageViewDestroy() {
this.update();
if (this.pdfPage) {
this.pdfPage.destroy();
}
};
this.update = function pageViewUpdate(scale, rotation) {
if (this.renderTask) {
this.renderTask.cancel();
}
this.resume = null;
this.renderingState = RenderingStates.INITIAL;
if (typeof rotation !== 'undefined') {
this.rotation = rotation;
}
this.scale = scale || this.scale;
var totalRotation = (this.rotation + this.pdfPageRotate) % 360;
this.viewport = this.viewport.clone({
scale: this.scale,
rotation: totalRotation
});
div.style.width = Math.floor(this.viewport.width) + 'px';
div.style.height = Math.floor(this.viewport.height) + 'px';
while (div.hasChildNodes())
div.removeChild(div.lastChild);
div.removeAttribute('data-loaded');
this.annotationLayer = null;
delete this.canvas;
this.loadingIconDiv = document.createElement('div');
this.loadingIconDiv.className = 'loadingIcon';
div.appendChild(this.loadingIconDiv);
};
Object.defineProperty(this, 'width', {
get: function PageView_getWidth() {
return this.viewport.width;
},
enumerable: true
});
Object.defineProperty(this, 'height', {
get: function PageView_getHeight() {
return this.viewport.height;
},
enumerable: true
});
var self = this;
function setupAnnotations(pageDiv, pdfPage, viewport) {
function bindLink(link, dest) {
link.href = PDFView.getDestinationHash(dest);
link.onclick = function pageViewSetupLinksOnclick() {
if (dest)
PDFView.navigateTo(dest);
return false;
};
link.className = 'internalLink';
}
function bindNamedAction(link, action) {
link.href = PDFView.getAnchorUrl('');
link.onclick = function pageViewSetupNamedActionOnClick() {
// See PDF reference, table 8.45 - Named action
switch (action) {
case 'GoToPage':
document.getElementById('pageNumber').focus();
break;
case 'GoBack':
PDFHistory.back();
break;
case 'GoForward':
PDFHistory.forward();
break;
case 'Find':
if (!PDFView.supportsIntegratedFind) {
PDFFindBar.toggle();
}
break;
case 'NextPage':
PDFView.page++;
break;
case 'PrevPage':
PDFView.page--;
break;
case 'LastPage':
PDFView.page = PDFView.pages.length;
break;
case 'FirstPage':
PDFView.page = 1;
break;
default:
break; // No action according to spec
}
return false;
};
link.className = 'internalLink';
}
pdfPage.getAnnotations().then(function(annotationsData) {
if (self.annotationLayer) {
// If an annotationLayer already exists, delete it to avoid creating
// duplicate annotations when rapidly re-zooming the document.
pageDiv.removeChild(self.annotationLayer);
self.annotationLayer = null;
}
viewport = viewport.clone({ dontFlip: true });
for (var i = 0; i < annotationsData.length; i++) {
var data = annotationsData[i];
var annotation = PDFJS.Annotation.fromData(data);
if (!annotation || !annotation.hasHtml()) {
continue;
}
var element = annotation.getHtmlElement(pdfPage.commonObjs);
mozL10n.translate(element);
data = annotation.getData();
var rect = data.rect;
var view = pdfPage.view;
rect = PDFJS.Util.normalizeRect([
rect[0],
view[3] - rect[1] + view[1],
rect[2],
view[3] - rect[3] + view[1]
]);
element.style.left = rect[0] + 'px';
element.style.top = rect[1] + 'px';
element.style.position = 'absolute';
var transform = viewport.transform;
var transformStr = 'matrix(' + transform.join(',') + ')';
CustomStyle.setProp('transform', element, transformStr);
var transformOriginStr = -rect[0] + 'px ' + -rect[1] + 'px';
CustomStyle.setProp('transformOrigin', element, transformOriginStr);
if (data.subtype === 'Link' && !data.url) {
if (data.action) {
bindNamedAction(element, data.action);
} else {
bindLink(element, ('dest' in data) ? data.dest : null);
}
}
if (!self.annotationLayer) {
var annotationLayerDiv = document.createElement('div');
annotationLayerDiv.className = 'annotationLayer';
pageDiv.appendChild(annotationLayerDiv);
self.annotationLayer = annotationLayerDiv;
}
self.annotationLayer.appendChild(element);
}
});
}
this.getPagePoint = function pageViewGetPagePoint(x, y) {
return this.viewport.convertToPdfPoint(x, y);
};
this.scrollIntoView = function pageViewScrollIntoView(dest) {
if (PDFView.isPresentationMode) { // Avoid breaking presentation mode.
dest = null;
}
if (!dest) {
scrollIntoView(div);
return;
}
var x = 0, y = 0;
var width = 0, height = 0, widthScale, heightScale;
var scale = 0;
switch (dest[1].name) {
case 'XYZ':
x = dest[2];
y = dest[3];
scale = dest[4];
// If x and/or y coordinates are not supplied, default to
// _top_ left of the page (not the obvious bottom left,
// since aligning the bottom of the intended page with the
// top of the window is rarely helpful).
x = x !== null ? x : 0;
y = y !== null ? y : this.height / this.scale;
break;
case 'Fit':
case 'FitB':
scale = 'page-fit';
break;
case 'FitH':
case 'FitBH':
y = dest[2];
scale = 'page-width';
break;
case 'FitV':
case 'FitBV':
x = dest[2];
scale = 'page-height';
break;
case 'FitR':
x = dest[2];
y = dest[3];
width = dest[4] - x;
height = dest[5] - y;
widthScale = (PDFView.container.clientWidth - SCROLLBAR_PADDING) /
width / CSS_UNITS;
heightScale = (PDFView.container.clientHeight - SCROLLBAR_PADDING) /
height / CSS_UNITS;
scale = Math.min(widthScale, heightScale);
break;
default:
return;
}
if (scale && scale !== PDFView.currentScale) {
PDFView.parseScale(scale, true, true);
} else if (PDFView.currentScale === UNKNOWN_SCALE) {
PDFView.parseScale(DEFAULT_SCALE, true, true);
}
if (scale === 'page-fit' && !dest[4]) {
scrollIntoView(div);
return;
}
var boundingRect = [
this.viewport.convertToViewportPoint(x, y),
this.viewport.convertToViewportPoint(x + width, y + height)
];
setTimeout(function pageViewScrollIntoViewRelayout() {
// letting page to re-layout before scrolling
var scale = PDFView.currentScale;
var x = Math.min(boundingRect[0][0], boundingRect[1][0]);
var y = Math.min(boundingRect[0][1], boundingRect[1][1]);
var width = Math.abs(boundingRect[0][0] - boundingRect[1][0]);
var height = Math.abs(boundingRect[0][1] - boundingRect[1][1]);
scrollIntoView(div, {left: x, top: y, width: width, height: height});
}, 0);
};
this.getTextContent = function pageviewGetTextContent() {
if (!this.textContent) {
this.textContent = this.pdfPage.getTextContent();
}
return this.textContent;
};
this.draw = function pageviewDraw(callback) {
var pdfPage = this.pdfPage;
if (!pdfPage) {
var promise = PDFView.getPage(this.id);
promise.then(function(pdfPage) {
this.setPdfPage(pdfPage);
this.draw(callback);
}.bind(this));
return;
}
if (this.renderingState !== RenderingStates.INITIAL) {
console.error('Must be in new state before drawing');
}
this.renderingState = RenderingStates.RUNNING;
var viewport = this.viewport;
// Wrap the canvas so if it has a css transform for highdpi the overflow
// will be hidden in FF.
var canvasWrapper = document.createElement('div');
canvasWrapper.style.width = div.style.width;
canvasWrapper.style.height = div.style.height;
canvasWrapper.classList.add('canvasWrapper');
var canvas = document.createElement('canvas');
canvas.id = 'page' + this.id;
canvasWrapper.appendChild(canvas);
div.appendChild(canvasWrapper);
this.canvas = canvas;
var scale = this.scale;
var outputScale = getOutputScale();
canvas.width = Math.floor(viewport.width) * outputScale.sx;
canvas.height = Math.floor(viewport.height) * outputScale.sy;
var textLayerDiv = null;
if (!PDFJS.disableTextLayer) {
textLayerDiv = document.createElement('div');
textLayerDiv.className = 'textLayer';
textLayerDiv.style.width = canvas.width + 'px';
textLayerDiv.style.height = canvas.height + 'px';
div.appendChild(textLayerDiv);
}
var textLayer = this.textLayer =
textLayerDiv ? new TextLayerBuilder({
textLayerDiv: textLayerDiv,
pageIndex: this.id - 1,
lastScrollSource: PDFView,
viewport: this.viewport,
isViewerInPresentationMode: PDFView.isPresentationMode
}) : null;
if (outputScale.scaled) {
var cssScale = 'scale(' + (1 / outputScale.sx) + ', ' +
(1 / outputScale.sy) + ')';
CustomStyle.setProp('transform' , canvas, cssScale);
CustomStyle.setProp('transformOrigin' , canvas, '0% 0%');
if (textLayerDiv) {
CustomStyle.setProp('transform' , textLayerDiv, cssScale);
CustomStyle.setProp('transformOrigin' , textLayerDiv, '0% 0%');
}
}
var ctx = canvas.getContext('2d');
// TODO(mack): use data attributes to store these
ctx._scaleX = outputScale.sx;
ctx._scaleY = outputScale.sy;
if (outputScale.scaled) {
ctx.scale(outputScale.sx, outputScale.sy);
}
//#if (FIREFOX || MOZCENTRAL)
// // Checking if document fonts are used only once
// var checkIfDocumentFontsUsed = !PDFView.pdfDocument.embeddedFontsUsed;
//#endif
// Rendering area
var self = this;
function pageViewDrawCallback(error) {
// The renderTask may have been replaced by a new one, so only remove the
// reference to the renderTask if it matches the one that is triggering
// this callback.
if (renderTask === self.renderTask) {
self.renderTask = null;
}
if (error === 'cancelled') {
return;
}
self.renderingState = RenderingStates.FINISHED;
if (self.loadingIconDiv) {
div.removeChild(self.loadingIconDiv);
delete self.loadingIconDiv;
}
//#if (FIREFOX || MOZCENTRAL)
// if (checkIfDocumentFontsUsed && PDFView.pdfDocument.embeddedFontsUsed &&
// PDFJS.disableFontFace) {
// console.error(mozL10n.get('web_fonts_disabled', null,
// 'Web fonts are disabled: unable to use embedded PDF fonts.'));
// PDFView.fallback();
// }
// if (self.textLayer && self.textLayer.textDivs &&
// self.textLayer.textDivs.length > 0 &&
// !PDFView.supportsDocumentColors) {
// console.error(mozL10n.get('document_colors_disabled', null,
// 'PDF documents are not allowed to use their own colors: ' +
// '\'Allow pages to choose their own colors\' ' +
// 'is deactivated in the browser.'));
// PDFView.fallback();
// }
//#endif
if (error) {
PDFView.error(mozL10n.get('rendering_error', null,
'An error occurred while rendering the page.'), error);
}
self.stats = pdfPage.stats;
self.updateStats();
if (self.onAfterDraw)
self.onAfterDraw();
cache.push(self);
var event = document.createEvent('CustomEvent');
event.initCustomEvent('pagerender', true, true, {
pageNumber: pdfPage.pageNumber
});
div.dispatchEvent(event);
//#if (FIREFOX || MOZCENTRAL)
// FirefoxCom.request('reportTelemetry', JSON.stringify({
// type: 'pageInfo'
// }));
// // TODO add stream types report here
//#endif
callback();
}
var renderContext = {
canvasContext: ctx,
viewport: this.viewport,
textLayer: textLayer,
continueCallback: function pdfViewcContinueCallback(cont) {
if (PDFView.highestPriorityPage !== 'page' + self.id) {
self.renderingState = RenderingStates.PAUSED;
self.resume = function resumeCallback() {
self.renderingState = RenderingStates.RUNNING;
cont();
};
return;
}
cont();
}
};
var renderTask = this.renderTask = this.pdfPage.render(renderContext);
this.renderTask.then(
function pdfPageRenderCallback() {
pageViewDrawCallback(null);
},
function pdfPageRenderError(error) {
pageViewDrawCallback(error);
}
);
if (textLayer) {
this.getTextContent().then(
function textContentResolved(textContent) {
textLayer.setTextContent(textContent);
}
);
}
setupAnnotations(div, pdfPage, this.viewport);
div.setAttribute('data-loaded', true);
};
this.beforePrint = function pageViewBeforePrint() {
var pdfPage = this.pdfPage;
var viewport = pdfPage.getViewport(1);
// Use the same hack we use for high dpi displays for printing to get better
// output until bug 811002 is fixed in FF.
var PRINT_OUTPUT_SCALE = 2;
var canvas = this.canvas = document.createElement('canvas');
canvas.width = Math.floor(viewport.width) * PRINT_OUTPUT_SCALE;
canvas.height = Math.floor(viewport.height) * PRINT_OUTPUT_SCALE;
canvas.style.width = (PRINT_OUTPUT_SCALE * viewport.width) + 'pt';
canvas.style.height = (PRINT_OUTPUT_SCALE * viewport.height) + 'pt';
var cssScale = 'scale(' + (1 / PRINT_OUTPUT_SCALE) + ', ' +
(1 / PRINT_OUTPUT_SCALE) + ')';
CustomStyle.setProp('transform' , canvas, cssScale);
CustomStyle.setProp('transformOrigin' , canvas, '0% 0%');
var printContainer = document.getElementById('printContainer');
printContainer.appendChild(canvas);
var self = this;
canvas.mozPrintCallback = function(obj) {
var ctx = obj.context;
ctx.save();
ctx.fillStyle = 'rgb(255, 255, 255)';
ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.restore();
ctx.scale(PRINT_OUTPUT_SCALE, PRINT_OUTPUT_SCALE);
var renderContext = {
canvasContext: ctx,
viewport: viewport
};
pdfPage.render(renderContext).then(function() {
// Tell the printEngine that rendering this canvas/page has finished.
obj.done();
self.pdfPage.destroy();
}, function(error) {
console.error(error);
// Tell the printEngine that rendering this canvas/page has failed.
// This will make the print proces stop.
if ('abort' in obj)
obj.abort();
else
obj.done();
self.pdfPage.destroy();
});
};
};
this.updateStats = function pageViewUpdateStats() {
if (!this.stats) {
return;
}
if (PDFJS.pdfBug && Stats.enabled) {
var stats = this.stats;
Stats.add(this.id, stats);
}
};
};
//#include page_view.js
//#include thumbnail_view.js
//#include text_layer_builder.js