8526d3c600
In Chromium extensions, the viewer's URL looks like this: chrome-extension://oemmndcbldboiebfnladdacbdfmadadm/http://example.com/file.pdf Furthermore, the PDF Viewer itself can also add something to the reference fragment: chrome-extension://oemmndcbldboiebfnladdacbdfmadadm/http://example.com/file.pdf#page=2 Consequently, it is difficult to copy a clean URL (e.g. for sharing over mail) without having to tidy-up the URL manually. This commit solves this issue by adding a button to the omnibox, which shows the clean PDF URL on click.
118 lines
3.9 KiB
JavaScript
118 lines
3.9 KiB
JavaScript
/* -*- 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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/*
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Copyright 2013 Mozilla Foundation
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 chrome */
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'use strict';
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(function ExtensionRouterClosure() {
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var VIEWER_URL = chrome.extension.getURL('content/web/viewer.html');
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var CRX_BASE_URL = chrome.extension.getURL('/');
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/**
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* @param {string} url The URL prefixed with chrome-extension://.../
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* @return {string|undefined} The percent-encoded URL of the (PDF) file.
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*/
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function parseExtensionURL(url) {
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url = url.substring(CRX_BASE_URL.length);
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var matchingUrl = /^(?:https?|file|ftp|chrome-extension)(:|%3A)/i.exec(url);
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if (matchingUrl) {
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url = url.split('#')[0];
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if (matchingUrl[1] === ':') {
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url = encodeURIComponent(url);
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}
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return url;
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}
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}
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/**
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* @param {string} url URL of PDF Viewer.
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* @return {string|undefined} The percent-encoded URL of the (PDF) file.
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*/
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function parseViewerURL(url) {
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if (url.lastIndexOf(VIEWER_URL, 0) !== 0) {
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// Does not even start with the correct URL. Bye!
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return;
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}
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url = url.match(/[&?]file=([^&#]+)/);
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if (url) {
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url = url[1];
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return url;
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}
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}
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/**
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* @param {number} tabId ID of tab where the page action will be shown
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* @param {string} url URL to be displayed in page action
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*/
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function showPageAction(tabId, displayUrl) {
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var url = parseExtensionURL(displayUrl) || parseViewerURL(displayUrl);
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if (url) {
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chrome.pageAction.setPopup({
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tabId: tabId,
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popup: 'pageActionPopup.html?file=' + url
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});
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chrome.pageAction.show(tabId);
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} else {
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console.log('Unable to get PDF url from ' + displayUrl);
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}
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}
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// TODO(rob): Use declarativeWebRequest once declared URL-encoding is
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// supported, see http://crbug.com/273589
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// (or rewrite the query string parser in viewer.js to get it to
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// recognize the non-URL-encoded PDF URL.)
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chrome.webRequest.onBeforeRequest.addListener(function(details) {
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// This listener converts chrome-extension://.../http://...pdf to
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// chrome-extension://.../content/web/viewer.html?file=http%3A%2F%2F...pdf
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var url = parseExtensionURL(details.url);
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if (url) {
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url = VIEWER_URL + '?file=' + url;
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console.log('Redirecting ' + details.url + ' to ' + url);
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return { redirectUrl: url };
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}
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}, {
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types: ['main_frame', 'sub_frame'],
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urls: [
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CRX_BASE_URL + 'http*', // and https
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CRX_BASE_URL + 'file*',
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CRX_BASE_URL + 'ftp*',
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CRX_BASE_URL + 'chrome-extension*'
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]
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}, ['blocking']);
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chrome.runtime.onMessage.addListener(function(message, sender) {
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if (message === 'showPageAction' && sender.tab) {
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if (sender.tab.url === sender.url) {
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// Only respond to messages from the top-level frame
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showPageAction(sender.tab.id, sender.url);
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}
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}
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});
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// When session restore is used, viewer pages may be loaded before the
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// webRequest event listener is attached (= page not found).
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// Reload these tabs.
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chrome.tabs.query({
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url: CRX_BASE_URL + '*://*'
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}, function(tabsFromLastSession) {
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for (var i = 0; i < tabsFromLastSession.length; ++i) {
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chrome.tabs.reload(tabsFromLastSession[i].id);
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}
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});
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console.log('Set up extension URL router.');
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})();
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