Move PDFThumbnailViewer to its own file
This commit is contained in:
Jonas Jenwald
parent
dd7fd0b665
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180
web/pdf_thumbnail_viewer.js
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180
web/pdf_thumbnail_viewer.js
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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
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/* Copyright 2012 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* globals watchScroll, getVisibleElements, scrollIntoView, ThumbnailView,
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Promise */
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'use strict';
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var THUMBNAIL_SCROLL_MARGIN = -19;
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//#include thumbnail_view.js
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/**
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* @typedef {Object} PDFThumbnailViewerOptions
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* @property {HTMLDivElement} container - The container for the thumbs elements.
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* @property {IPDFLinkService} linkService - The navigation/linking service.
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* @property {PDFRenderingQueue} renderingQueue - The rendering queue object.
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*/
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/**
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* Simple viewer control to display thumbs for pages.
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* @class
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*/
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var PDFThumbnailViewer = (function pdfThumbnailViewer() {
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/**
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* @constructs
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* @param {PDFThumbnailViewerOptions} options
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*/
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function PDFThumbnailViewer(options) {
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this.container = options.container;
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this.renderingQueue = options.renderingQueue;
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this.linkService = options.linkService;
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this.scroll = watchScroll(this.container, this._scrollUpdated.bind(this));
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this._resetView();
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}
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PDFThumbnailViewer.prototype = {
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_scrollUpdated: function PDFThumbnailViewer_scrollUpdated() {
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this.renderingQueue.renderHighestPriority();
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},
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getThumbnail: function PDFThumbnailViewer_getThumbnail(index) {
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return this.thumbnails[index];
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},
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_getVisibleThumbs: function PDFThumbnailViewer_getVisibleThumbs() {
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return getVisibleElements(this.container, this.thumbnails);
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},
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scrollThumbnailIntoView: function (page) {
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var selected = document.querySelector('.thumbnail.selected');
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if (selected) {
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selected.classList.remove('selected');
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}
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var thumbnail = document.getElementById('thumbnailContainer' + page);
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thumbnail.classList.add('selected');
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var visibleThumbs = this._getVisibleThumbs();
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var numVisibleThumbs = visibleThumbs.views.length;
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// If the thumbnail isn't currently visible, scroll it into view.
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if (numVisibleThumbs > 0) {
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var first = visibleThumbs.first.id;
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// Account for only one thumbnail being visible.
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var last = (numVisibleThumbs > 1 ? visibleThumbs.last.id : first);
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if (page <= first || page >= last) {
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scrollIntoView(thumbnail, { top: THUMBNAIL_SCROLL_MARGIN });
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}
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}
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},
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get pagesRotation() {
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return this._pagesRotation;
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},
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set pagesRotation(rotation) {
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this._pagesRotation = rotation;
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for (var i = 0, l = this.thumbnails.length; i < l; i++) {
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var thumb = this.thumbnails[i];
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thumb.update(rotation);
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}
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},
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cleanup: function PDFThumbnailViewer_cleanup() {
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ThumbnailView.tempImageCache = null;
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},
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_resetView: function () {
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this.thumbnails = [];
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this._pagesRotation = 0;
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this._pagesRequests = [];
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},
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setDocument: function (pdfDocument) {
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if (this.pdfDocument) {
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// cleanup of the elements and views
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var thumbsView = this.container;
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while (thumbsView.hasChildNodes()) {
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thumbsView.removeChild(thumbsView.lastChild);
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}
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this._resetView();
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}
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this.pdfDocument = pdfDocument;
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if (!pdfDocument) {
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return Promise.resolve();
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}
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return pdfDocument.getPage(1).then(function (firstPage) {
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var pagesCount = pdfDocument.numPages;
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var viewport = firstPage.getViewport(1.0);
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for (var pageNum = 1; pageNum <= pagesCount; ++pageNum) {
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var thumbnail = new ThumbnailView(this.container, pageNum,
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viewport.clone(), this.linkService,
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this.renderingQueue);
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this.thumbnails.push(thumbnail);
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}
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}.bind(this));
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},
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/**
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* @param {PDFPageView} pageView
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* @returns {PDFPage}
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* @private
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*/
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_ensurePdfPageLoaded: function (thumbView) {
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if (thumbView.pdfPage) {
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return Promise.resolve(thumbView.pdfPage);
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}
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var pageNumber = thumbView.id;
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if (this._pagesRequests[pageNumber]) {
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return this._pagesRequests[pageNumber];
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}
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var promise = this.pdfDocument.getPage(pageNumber).then(
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function (pdfPage) {
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thumbView.setPdfPage(pdfPage);
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this._pagesRequests[pageNumber] = null;
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return pdfPage;
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}.bind(this));
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this._pagesRequests[pageNumber] = promise;
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return promise;
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},
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ensureThumbnailVisible:
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function PDFThumbnailViewer_ensureThumbnailVisible(page) {
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// Ensure that the thumbnail of the current page is visible
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// when switching from another view.
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scrollIntoView(document.getElementById('thumbnailContainer' + page));
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},
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forceRendering: function () {
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var visibleThumbs = this._getVisibleThumbs();
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var thumbView = this.renderingQueue.getHighestPriority(visibleThumbs,
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this.thumbnails,
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this.scroll.down);
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if (thumbView) {
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this._ensurePdfPageLoaded(thumbView).then(function () {
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this.renderingQueue.renderView(thumbView);
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}.bind(this));
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return true;
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}
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return false;
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}
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};
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return PDFThumbnailViewer;
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})();
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@ -14,12 +14,10 @@
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* globals mozL10n, RenderingStates, Promise, scrollIntoView,
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watchScroll, getVisibleElements */
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/* globals mozL10n, RenderingStates, Promise */
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'use strict';
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var THUMBNAIL_SCROLL_MARGIN = -19;
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var THUMBNAIL_CANVAS_BORDER_WIDTH = 1;
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/**
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@ -252,159 +250,3 @@ var ThumbnailView = function thumbnailView(container, id, defaultViewport,
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};
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ThumbnailView.tempImageCache = null;
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/**
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* @typedef {Object} PDFThumbnailViewerOptions
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* @property {HTMLDivElement} container - The container for the thumbs elements.
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* @property {IPDFLinkService} linkService - The navigation/linking service.
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* @property {PDFRenderingQueue} renderingQueue - The rendering queue object.
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*/
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/**
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* Simple viewer control to display thumbs for pages.
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* @class
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*/
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var PDFThumbnailViewer = (function pdfThumbnailViewer() {
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/**
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* @constructs
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* @param {PDFThumbnailViewerOptions} options
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*/
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function PDFThumbnailViewer(options) {
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this.container = options.container;
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this.renderingQueue = options.renderingQueue;
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this.linkService = options.linkService;
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this.scroll = watchScroll(this.container, this._scrollUpdated.bind(this));
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this._resetView();
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}
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PDFThumbnailViewer.prototype = {
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_scrollUpdated: function PDFThumbnailViewer_scrollUpdated() {
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this.renderingQueue.renderHighestPriority();
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},
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getThumbnail: function PDFThumbnailViewer_getThumbnail(index) {
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return this.thumbnails[index];
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},
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_getVisibleThumbs: function PDFThumbnailViewer_getVisibleThumbs() {
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return getVisibleElements(this.container, this.thumbnails);
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},
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scrollThumbnailIntoView: function (page) {
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var selected = document.querySelector('.thumbnail.selected');
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if (selected) {
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selected.classList.remove('selected');
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}
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var thumbnail = document.getElementById('thumbnailContainer' + page);
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thumbnail.classList.add('selected');
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var visibleThumbs = this._getVisibleThumbs();
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var numVisibleThumbs = visibleThumbs.views.length;
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// If the thumbnail isn't currently visible, scroll it into view.
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if (numVisibleThumbs > 0) {
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var first = visibleThumbs.first.id;
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// Account for only one thumbnail being visible.
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var last = (numVisibleThumbs > 1 ? visibleThumbs.last.id : first);
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if (page <= first || page >= last) {
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scrollIntoView(thumbnail, { top: THUMBNAIL_SCROLL_MARGIN });
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}
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}
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},
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get pagesRotation() {
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return this._pagesRotation;
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},
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set pagesRotation(rotation) {
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this._pagesRotation = rotation;
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for (var i = 0, l = this.thumbnails.length; i < l; i++) {
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var thumb = this.thumbnails[i];
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thumb.update(rotation);
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}
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},
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cleanup: function PDFThumbnailViewer_cleanup() {
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ThumbnailView.tempImageCache = null;
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},
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_resetView: function () {
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this.thumbnails = [];
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this._pagesRotation = 0;
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this._pagesRequests = [];
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},
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setDocument: function (pdfDocument) {
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if (this.pdfDocument) {
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// cleanup of the elements and views
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var thumbsView = this.container;
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while (thumbsView.hasChildNodes()) {
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thumbsView.removeChild(thumbsView.lastChild);
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}
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this._resetView();
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}
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this.pdfDocument = pdfDocument;
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if (!pdfDocument) {
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return Promise.resolve();
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}
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return pdfDocument.getPage(1).then(function (firstPage) {
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var pagesCount = pdfDocument.numPages;
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var viewport = firstPage.getViewport(1.0);
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for (var pageNum = 1; pageNum <= pagesCount; ++pageNum) {
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var thumbnail = new ThumbnailView(this.container, pageNum,
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viewport.clone(), this.linkService,
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this.renderingQueue);
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this.thumbnails.push(thumbnail);
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}
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}.bind(this));
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},
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/**
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* @param {PDFPageView} pageView
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* @returns {PDFPage}
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* @private
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*/
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_ensurePdfPageLoaded: function (thumbView) {
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if (thumbView.pdfPage) {
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return Promise.resolve(thumbView.pdfPage);
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}
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var pageNumber = thumbView.id;
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if (this._pagesRequests[pageNumber]) {
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return this._pagesRequests[pageNumber];
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}
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var promise = this.pdfDocument.getPage(pageNumber).then(
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function (pdfPage) {
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thumbView.setPdfPage(pdfPage);
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this._pagesRequests[pageNumber] = null;
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return pdfPage;
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}.bind(this));
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this._pagesRequests[pageNumber] = promise;
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return promise;
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},
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ensureThumbnailVisible:
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function PDFThumbnailViewer_ensureThumbnailVisible(page) {
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// Ensure that the thumbnail of the current page is visible
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// when switching from another view.
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scrollIntoView(document.getElementById('thumbnailContainer' + page));
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},
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forceRendering: function () {
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var visibleThumbs = this._getVisibleThumbs();
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var thumbView = this.renderingQueue.getHighestPriority(visibleThumbs,
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this.thumbnails,
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this.scroll.down);
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if (thumbView) {
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this._ensurePdfPageLoaded(thumbView).then(function () {
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this.renderingQueue.renderView(thumbView);
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}.bind(this));
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return true;
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}
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return false;
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}
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};
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return PDFThumbnailViewer;
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})();
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@ -74,6 +74,7 @@ http://sourceforge.net/adobe/cmap/wiki/License/
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<script src="annotations_layer_builder.js"></script>
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<script src="pdf_viewer.js"></script>
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<script src="thumbnail_view.js"></script>
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<script src="pdf_thumbnail_viewer.js"></script>
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<script src="document_outline_view.js"></script>
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<script src="document_attachments_view.js"></script>
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<script src="pdf_find_bar.js"></script>
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@ -85,6 +85,7 @@ var mozL10n = document.mozL10n || document.webL10n;
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//#include password_prompt.js
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//#include document_properties.js
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//#include pdf_viewer.js
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//#include pdf_thumbnail_viewer.js
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var PDFViewerApplication = {
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initialBookmark: document.location.hash.substring(1),
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@ -1389,7 +1390,6 @@ var PDFViewerApplication = {
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window.PDFView = PDFViewerApplication; // obsolete name, using it as an alias
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//#endif
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//#include thumbnail_view.js
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//#include document_outline_view.js
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//#include document_attachments_view.js
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