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Update chrome.tabs.executeScriptInFrame dependency

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References:
- https://github.com/Rob--W/chrome-api/issues/1
- 4c5a598c0b...f211d2d679
This commit is contained in:
Rob Wu 2014-01-13 13:04:56 +01:00
parent d6ed4f2631
commit 18e4d32c11
1 changed files with 8 additions and 5 deletions
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13
extensions/chromium/chrome.tabs.executeScriptInFrame.js
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@ -38,11 +38,13 @@ var callbacks = {};
chrome.webRequest.onBeforeRequest.addListener(function showFrameId(details) {
// Positive integer frameId >= 0
// Since an image is used as a data transport, we add 1 to get a non-zero height.
// Since an image is used as a data transport, we add 1 to get a non-zero width.
var frameId = details.frameId + 1;
// Assume that the frameId fits in two bytes - which is a very reasonable assumption.
var width = String.fromCharCode(frameId & 0xFF, frameId & 0xFF00);
var height = '\x01\x00';
// Assume that the frameId fits in three bytes - which is a very reasonable assumption.
var width = String.fromCharCode(frameId & 0xFF, (frameId >> 8) & 0xFF);
// When frameId > 0xFFFF, use the height to convey the additional information.
// Again, add 1 to make sure that the height is non-zero.
var height = String.fromCharCode((frameId >> 16) + 1, 0);
// Convert data to base64 to avoid loss of bytes
var image = 'data:image/gif;base64,' + btoa(
// 4749 4638 3961 (GIF header)
@ -207,7 +209,8 @@ var DETECT_FRAME = '' + function checkFrame(window, identifier, frameId, code) {
// Do NOT use new Image(), because of http://crbug.com/245296 in Chrome 27-29
i = window.document.createElement('img');
i.onload = function() {
window.__executeScript_frameId__ = this.naturalWidth - 1;
window.__executeScript_frameId__ = (this.naturalWidth - 1) +
(this.naturalHeight - 1 << 16);
evalAsContentScript();
};
// Trigger webRequest event to get frameId