Tim van der Meij
12 years ago
12 changed files with 441 additions and 309 deletions
@ -0,0 +1,256 @@ |
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/** |
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* (c) 2013 Rob Wu <gwnRob@gmail.com> |
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* Released under the MIT license |
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* https://github.com/Rob--W/chrome-api/chrome.tabs.executeScriptInFrame
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* |
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* Implements the chrome.tabs.executeScriptInFrame API. |
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* This API is similar to the chrome.tabs.executeScript method, except |
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* that it also recognizes the "frameId" property. |
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* This frameId can be obtained through the webNavigation or webRequest API. |
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* |
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* When an error occurs, chrome.runtime.lastError is set. |
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* |
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* Required permissions: |
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* webRequest |
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* webRequestBlocking |
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* Host permissions for the tab |
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* |
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* In addition, the following field must also be set in manifest.json: |
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* "web_accessible_resources": ["getFrameId"] |
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*/ |
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(function() { |
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/* jshint browser:true, maxlen:100 */ |
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/* globals chrome, console */ |
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'use strict'; |
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chrome.tabs.executeScriptInFrame = executeScript; |
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// This URL is used to communicate the frameId. The resource is never visited, so it should
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// be a non-existent location. Do not use *, ", ' or line breaks in the file name.
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var URL_WHAT_IS_MY_FRAME_ID = chrome.extension.getURL('getFrameId'); |
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// The callback will be called within ... ms:
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// Don't set a too low value.
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var MAXIMUM_RESPONSE_TIME_MS = 1000; |
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// Callbacks are stored here until they're invoked.
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// Key = dummyUrl, value = callback function
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var callbacks = {}; |
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chrome.webRequest.onBeforeRequest.addListener(function showFrameId(details) { |
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// Positive integer frameId >= 0
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// Since an image is used as a data transport, we add 1 to get a non-zero height.
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var frameId = details.frameId + 1; |
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// Assume that the frameId fits in two bytes - which is a very reasonable assumption.
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var width = String.fromCharCode(frameId & 0xFF, frameId & 0xFF00); |
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var height = '\x01\x00'; |
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// Convert data to base64 to avoid loss of bytes
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var image = 'data:image/gif;base64,' + btoa( |
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// 4749 4638 3961 (GIF header)
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'GIF89a' + |
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// Logical Screen Width (LSB)
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width + |
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// Logical Screen Height (LSB)
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height + |
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// "No Global Color Table follows"
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'\x00' + |
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// Background color
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'\xff' + |
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// No aspect information is given
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'\x00' + |
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// (image descriptor)
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// Image Separator
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'\x2c' + |
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// Image Position (Left & Top)
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'\x00\x00\x00\x00' + |
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// Image Width (LSB)
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width + |
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// Image Height (LSB)
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height + |
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// Local Color Table is not present
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'\x00' + |
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// (End of image descriptor)
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// Image data
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'\x02\x02\x44\x01\x00' + |
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// GIF trailer
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'\x3b' |
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); |
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return {redirectUrl: image}; |
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}, { |
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urls: [URL_WHAT_IS_MY_FRAME_ID + '*'], |
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types: ['image'] |
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}, ['blocking']); |
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chrome.runtime.onMessage.addListener(function(message, sender, sendResponse) { |
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if (message && message.executeScriptCallback) { |
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var callback = callbacks[message.identifier]; |
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if (callback) { |
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if (message.hello) { |
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clearTimeout(callback.timer); |
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return; |
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} |
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delete callbacks[message.identifier]; |
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// Result within an array to be consistent with the chrome.tabs.executeScript API.
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callback([message.evalResult]); |
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} else { |
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console.warn('Callback not found for response in tab ' + sender.tab.id); |
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} |
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} |
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}); |
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/** |
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* Execute content script in a specific frame. |
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* |
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* @param tabId {integer} required |
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* @param details.frameId {integer} required |
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* @param details.code {string} Code or file is required (not both) |
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* @param details.file {string} Code or file is required (not both) |
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* @param details.runAt {optional string} One of "document_start", "document_end", "document_idle" |
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* @param callback {optional function(optional array of any result)} When an error occurs, result |
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* is not set. |
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*/ |
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function executeScript(tabId, details, callback) { |
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console.assert(typeof details === 'object', 'details must be an object (argument 0)'); |
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var frameId = details.frameId; |
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console.assert(typeof tabId === 'number', 'details.tabId must be a number'); |
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console.assert(typeof frameId === 'number', 'details.frameId must be a number'); |
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var sourceType = 'code' in details ? 'code' : 'file'; |
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console.assert(sourceType in details, 'No source code or file specified'); |
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var sourceValue = details[sourceType]; |
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console.assert(typeof sourceValue === 'string', 'details.' + sourceType + ' must be a string'); |
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var runAt = details.runAt; |
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if (!callback) callback = function() {/* no-op*/}; |
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console.assert(typeof callback === 'function', 'callback must be a function'); |
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if (frameId === 0) { |
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// No need for heavy lifting if we want to inject the script in the main frame
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var injectDetails = { |
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allFrames: false, |
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runAt: runAt |
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}; |
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injectDetails[sourceType] = sourceValue; |
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chrome.tabs.executeScript(tabId, injectDetails, callback); |
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return; |
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} |
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var identifier = Math.random().toString(36); |
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if (sourceType === 'code') { |
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executeScriptInFrame(); |
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} else { // sourceType === 'file'
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(function() { |
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var x = new XMLHttpRequest(); |
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x.open('GET', chrome.extension.getURL(sourceValue), true); |
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x.onload = function() { |
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sourceValue = x.responseText; |
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executeScriptInFrame(); |
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}; |
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x.onerror = function executeScriptResourceFetchError() { |
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var message = 'Failed to load file: "' + sourceValue + '".'; |
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console.error('executeScript: ' + message); |
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chrome.runtime.lastError = chrome.extension.lastError = { message: message }; |
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try { |
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callback(); |
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} finally { |
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chrome.runtime.lastError = chrome.extension.lastError = undefined; |
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} |
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}; |
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x.send(); |
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})(); |
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} |
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function executeScriptInFrame() { |
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callbacks[identifier] = callback; |
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chrome.tabs.executeScript(tabId, { |
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code: '(' + DETECT_FRAME + ')(' + |
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'window,' + |
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JSON.stringify(identifier) + ',' + |
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frameId + ',' + |
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JSON.stringify(sourceValue) + ')', |
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allFrames: true, |
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runAt: 'document_start' |
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}, function(results) { |
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if (results) { |
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callback.timer = setTimeout(executeScriptTimedOut, MAXIMUM_RESPONSE_TIME_MS); |
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} else { |
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// Failed :(
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delete callbacks[identifier]; |
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callback(); |
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} |
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}); |
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} |
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function executeScriptTimedOut() { |
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var callback = callbacks[identifier]; |
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if (!callback) { |
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return; |
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} |
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delete callbacks[identifier]; |
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var message = 'Failed to execute script: Frame ' + frameId + ' not found in tab ' + tabId; |
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console.error('executeScript: ' + message); |
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chrome.runtime.lastError = chrome.extension.lastError = { message: message }; |
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try { |
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callback(); |
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} finally { |
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chrome.runtime.lastError = chrome.extension.lastError = undefined; |
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} |
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} |
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} |
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/** |
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* Code executed as a content script. |
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*/ |
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var DETECT_FRAME = '' + function checkFrame(window, identifier, frameId, code) { |
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var i; |
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if ('__executeScript_frameId__' in window) { |
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evalAsContentScript(); |
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} else { |
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// Do NOT use new Image(), because of http://crbug.com/245296 in Chrome 27-29
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i = window.document.createElement('img'); |
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i.onload = function() { |
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window.__executeScript_frameId__ = this.naturalWidth - 1; |
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evalAsContentScript(); |
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}; |
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// Trigger webRequest event to get frameId
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// (append extra characters to bust the cache)
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i.src = 'URL_WHAT_IS_MY_FRAME_ID?' + Math.random().toString(36).slice(-6); |
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} |
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for (i = 0 ; i < window.frames.length; ++i) { |
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try { |
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var frame = window.frames[i]; |
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var scheme = frame.location.protocol; |
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if (scheme !== 'https:' && scheme !== 'http:' && scheme !== 'file:') { |
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checkFrame(frame, identifier, frameId, code); |
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} |
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} catch (e) { |
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// blocked by same origin policy, so it's not a javascript: / about:blank
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// URL. chrome.tabs.executeScript will run the script for the frame.
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} |
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} |
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function evalAsContentScript() { |
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if (window.__executeScript_frameId__ !== frameId) { |
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return; |
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} |
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// Send an early message to make sure that any blocking code
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// in the evaluated code does not cause the time-out in the background page
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// to be triggered
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chrome.runtime.sendMessage({ |
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executeScriptCallback: true, |
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hello: true, |
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identifier: identifier |
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}); |
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var result = null; |
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try { |
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// jshint evil:true
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result = window.eval(code); |
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} finally { |
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chrome.runtime.sendMessage({ |
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executeScriptCallback: true, |
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evalResult: result, |
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identifier: identifier |
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}); |
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} |
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} |
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}.toString().replace('URL_WHAT_IS_MY_FRAME_ID', URL_WHAT_IS_MY_FRAME_ID); |
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})(); |
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@ -0,0 +1,54 @@ |
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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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/* |
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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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// 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 = details.url.substring(CRX_BASE_URL.length); |
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var matchingUrl = /^(?:https?|file|ftp|chrome-extension)(:|%3A)/.exec(url); |
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if (matchingUrl) { |
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// location.hash is restored when "#" is missing from URL.
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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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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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console.log('Set up extension URL router.'); |
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})(); |
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@ -1,3 +0,0 @@ |
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parsererror { |
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display: none; |
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} |
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@ -1,150 +0,0 @@ |
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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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/* |
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Copyright 2012 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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if (!chrome.runtime) { |
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// Chrome 21-
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chrome.runtime = chrome.extension; |
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} else if (!chrome.runtime.onMessage) { |
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// Chrome 22-25
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chrome.runtime.onMessage = chrome.extension.onMessage; |
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} |
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var VIEWER_URL = chrome.runtime.getURL('content/web/viewer.html'); |
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var BASE_URL = VIEWER_URL.replace(/[^\/]+$/, ''); |
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function getViewerURL(pdf_url) { |
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return VIEWER_URL + '?file=' + encodeURIComponent(pdf_url); |
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} |
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function showViewer(url) { |
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if (document.documentElement === null) { |
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// If the root element hasn't been rendered yet, delay the next operation.
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// Otherwise, document.readyState will get stuck in "interactive".
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setTimeout(showViewer, 0, url); |
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return; |
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} |
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// Cancel page load and empty document.
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window.stop(); |
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document.body.textContent = ''; |
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replaceDocumentWithViewer(url); |
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} |
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function makeLinksAbsolute(doc) { |
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normalize('href', 'link[href]'); |
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normalize('src', 'style[src],script[src]'); |
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function normalize(attribute, selector) { |
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var nodes = doc.querySelectorAll(selector); |
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for (var i=0; i<nodes.length; ++i) { |
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var node = nodes[i]; |
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var newAttribute = makeAbsolute(node.getAttribute(attribute)); |
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node.setAttribute(attribute, newAttribute); |
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} |
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} |
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function makeAbsolute(url) { |
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if (url.indexOf('://') !== -1) return url; |
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return BASE_URL + url; |
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} |
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} |
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function replaceDocumentWithViewer(url) { |
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var x = new XMLHttpRequest(); |
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x.open('GET', VIEWER_URL); |
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x.responseType = 'document'; |
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x.onload = function() { |
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// Resolve all relative URLs
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makeLinksAbsolute(x.response); |
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// Remove all <script> elements (added back later).
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// I assumed that no inline script tags exist.
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var scripts = [], script; |
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// new Worker('chrome-extension://..../pdf.js') fails, despite having
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// the correct permissions. Fix it:
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script = document.createElement('script'); |
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script.onload = loadNextScript; |
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script.src = chrome.runtime.getURL('patch-worker.js'); |
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scripts.push(script); |
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while (x.response.scripts.length) { |
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script = x.response.scripts[0]; |
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var newScript = document.createElement('script'); |
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newScript.onload = loadNextScript; |
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newScript.src = script.src; |
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script.parentNode.removeChild(script); |
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scripts.push(newScript); |
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} |
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// Replace document with viewer
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var docEl = document.adoptNode(x.response.documentElement); |
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document.replaceChild(docEl, document.documentElement); |
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// Force Chrome to render content
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|
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// (without this line, the layout is broken and querySelector
|
|
||||||
// fails to find elements, even when they appear in the doc)
|
|
||||||
document.body.innerHTML += ''; |
|
||||||
|
|
||||||
// Load all scripts
|
|
||||||
loadNextScript(); |
|
||||||
|
|
||||||
function loadNextScript() { |
|
||||||
if (scripts.length > 0) |
|
||||||
document.head.appendChild(scripts.shift()); |
|
||||||
else |
|
||||||
renderPDF(url); |
|
||||||
} |
|
||||||
}; |
|
||||||
x.send(); |
|
||||||
} |
|
||||||
function renderPDF(url) { |
|
||||||
var args = { |
|
||||||
BASE_URL: BASE_URL, |
|
||||||
pdf_url: url |
|
||||||
}; |
|
||||||
// The following technique is explained at
|
|
||||||
// http://stackoverflow.com/a/9517879/938089
|
|
||||||
var script = document.createElement('script'); |
|
||||||
script.textContent = |
|
||||||
'(function(args) {' + |
|
||||||
' PDFJS.imageResourcesPath = args.BASE_URL + PDFJS.imageResourcesPath;' + |
|
||||||
' PDFJS.workerSrc = args.BASE_URL + PDFJS.workerSrc;' + |
|
||||||
' window.DEFAULT_URL = args.pdf_url;' + |
|
||||||
'})(' + JSON.stringify(args) + ');'; |
|
||||||
document.head.appendChild(script); |
|
||||||
|
|
||||||
// Trigger domready
|
|
||||||
if (document.readyState === 'complete') { |
|
||||||
var event = document.createEvent('Event'); |
|
||||||
event.initEvent('DOMContentLoaded', true, true); |
|
||||||
document.dispatchEvent(event); |
|
||||||
} |
|
||||||
} |
|
||||||
|
|
||||||
|
|
||||||
// Activate the content script only once per frame (until reload)
|
|
||||||
if (!window.hasRun) { |
|
||||||
window.hasRun = true; |
|
||||||
chrome.runtime.onMessage.addListener(function listener(message) { |
|
||||||
if (message && message.type === 'showPDFViewer' && |
|
||||||
message.url === location.href) { |
|
||||||
chrome.runtime.onMessage.removeListener(listener); |
|
||||||
showViewer(message.url); |
|
||||||
} |
|
||||||
}); |
|
||||||
} |
|
||||||
@ -0,0 +1 @@ |
|||||||
|
// This file has no code, and is used to deal with http://crbug.com/302548
|
||||||
@ -1,69 +0,0 @@ |
|||||||
/* -*- 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 chrome, isPdfDownloadable */ |
|
||||||
|
|
||||||
'use strict'; |
|
||||||
|
|
||||||
// The onHeadersReceived event is not generated for local resources.
|
|
||||||
// Fortunately, local PDF files will have the .pdf extension, so there's
|
|
||||||
// no need to detect the Content-Type
|
|
||||||
// Unfortunately, the omnibox won't show the URL.
|
|
||||||
// Unfortunately, this method will not work for pages in incognito mode,
|
|
||||||
// unless "incognito":"split" is used AND http:/crbug.com/224094 is fixed.
|
|
||||||
|
|
||||||
// Keeping track of incognito tab IDs will become obsolete when
|
|
||||||
// "incognito":"split" can be used.
|
|
||||||
var incognitoTabIds = []; |
|
||||||
chrome.windows.getAll({ populate: true }, function(windows) { |
|
||||||
windows.forEach(function(win) { |
|
||||||
if (win.incognito) { |
|
||||||
win.tabs.forEach(function(tab) { |
|
||||||
incognitoTabIds.push(tab.id); |
|
||||||
}); |
|
||||||
} |
|
||||||
}); |
|
||||||
}); |
|
||||||
chrome.tabs.onCreated.addListener(function(tab) { |
|
||||||
if (tab.incognito) incognitoTabIds.push(tab.id); |
|
||||||
}); |
|
||||||
chrome.tabs.onRemoved.addListener(function(tabId) { |
|
||||||
var index = incognitoTabIds.indexOf(tabId); |
|
||||||
if (index !== -1) incognitoTabIds.splice(index, 1); |
|
||||||
}); |
|
||||||
|
|
||||||
chrome.webRequest.onBeforeRequest.addListener( |
|
||||||
function(details) { |
|
||||||
if (isPdfDownloadable(details)) // Defined in pdfHandler.js
|
|
||||||
return; |
|
||||||
|
|
||||||
if (incognitoTabIds.indexOf(details.tabId) !== -1) |
|
||||||
return; // Doesn't work in incognito mode, so don't redirect.
|
|
||||||
|
|
||||||
var viewerPage = 'content/web/viewer.html'; |
|
||||||
var url = chrome.runtime.getURL(viewerPage) + |
|
||||||
'?file=' + encodeURIComponent(details.url); |
|
||||||
return { redirectUrl: url }; |
|
||||||
}, |
|
||||||
{ |
|
||||||
urls: [ |
|
||||||
'file://*/*.pdf', |
|
||||||
'file://*/*.PDF' |
|
||||||
], |
|
||||||
types: ['main_frame', 'sub_frame'] |
|
||||||
}, |
|
||||||
['blocking']); |
|
||||||
@ -0,0 +1,5 @@ |
|||||||
|
<!-- This snippet is used in the Chrome extension, see Makefile --> |
||||||
|
<base href="/content/web/"> |
||||||
|
<link rel="resource" type="application/l10n" href="locale/locale.properties"> |
||||||
|
<script type="text/javascript" src="l10n.js"></script> |
||||||
|
<script type="text/javascript" src="../build/pdf.js"></script> |
||||||
Loading…
Reference in new issue