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mirror of https://github.com/gorhill/uBlock.git synced 2024-10-04 08:37:11 +02:00

some refactoring of new DOM inspector code

This commit is contained in:
gorhill 2015-06-26 15:45:54 -04:00
parent 631443768f
commit 7d2855180c
8 changed files with 878 additions and 992 deletions

View File

@ -603,7 +603,7 @@ vAPI.messaging.onPortMessage = function(request, port) {
return;
}
console.error('µBlock> messaging > unknown request: %o', request);
console.error('uBlock> messaging > unknown request: %o', request);
// Unhandled:
// Need to callback anyways in case caller expected an answer, or
@ -661,9 +661,26 @@ vAPI.messaging.broadcast = function(message) {
/******************************************************************************/
vAPI.messaging.send = function(tabId, channelName, message) {
// "Auxiliary process": any process other than main process.
//
// Main process to auxiliary processes messaging. The approach is that of
// smoke-signal messaging, so emitters have to be ready to deal with no
// response at all (i.e. use timeout where needed).
//
// Mandatory:
// - receiverTabId: Which tab to send the message.
// No target tab id means sends to all tabs.
// - receiverChannel: Which channel to send the message.
//
// Optional:
// - senderTabId: From which tab the message originates.
// - senderChannel: From which channel the message originates.
// These optional fields are useful for the target, and may be used
// to send back a response to the sender.
vAPI.messaging.post = function(message) {
var port;
var chromiumTabId = toChromiumTabId(tabId);
var chromiumTabId = toChromiumTabId(message.receiverTabId);
for ( var portName in this.ports ) {
if ( this.ports.hasOwnProperty(portName) === false ) {
continue;
@ -673,7 +690,7 @@ vAPI.messaging.send = function(tabId, channelName, message) {
continue;
}
port.postMessage({
channelName: channelName,
channelName: message.receiverChannel,
msg: message
});
if ( chromiumTabId !== 0 ) {

View File

@ -1239,10 +1239,30 @@ vAPI.messaging.setup = function(defaultHandler) {
/******************************************************************************/
vAPI.messaging.send = function(tabId, channelName, message) {
var ffTabId = tabId || '';
// "Auxiliary process": any process other than main process.
//
// Main process to auxiliary processes messaging. The approach is that of
// smoke-signal messaging, so emitters have to be ready to deal with no
// response at all (i.e. use timeout where needed).
//
// Mandatory:
// - receiverTabId: Which tab to send the message.
// No target tab id means sends to all tabs.
// - receiverChannel: Which channel to send the message.
//
// Optional:
// - senderTabId: From which tab the message originates.
// - senderChannel: From which channel the message originates.
// These optional fields are useful for the target, and may be used
// to send back a response to the sender.
vAPI.messaging.post = function(message) {
var ffTabId = message.receiverTabId || '';
var targetId = location.host + ':broadcast';
var payload = JSON.stringify({ channelName: channelName, msg: message });
var payload = JSON.stringify({
channelName: message.receiverChannel,
msg: message
});
if ( ffTabId === '' ) {
this.globalMessageManager.broadcastAsyncMessage(targetId, payload);

View File

@ -133,80 +133,16 @@ var tabIdFromClassName = function(className) {
(function domInspector() {
// Don't bother if the browser is not modern enough.
if ( typeof Map === undefined ) {
if ( typeof Map === undefined || typeof WeakMap === undefined ) {
return;
}
var enabled = false;
var state = '';
var fingerprint = '';
var fingerprintTimer = null;
var currentTabId = '';
var inspectedTabId = '';
var currentSelector = '';
var showdomButton = uDom.nodeFromId('showdom');
var inspector = uDom.nodeFromId('domInspector');
var tabSelector = uDom.nodeFromId('pageSelector');
var inlineElementTags = [
'a', 'abbr', 'acronym',
'b', 'bdo', 'big', 'br', 'button',
'cite', 'code',
'del', 'dfn',
'em',
'font',
'i', 'img', 'input', 'ins',
'kbd',
'label',
'map',
'object',
'q',
'samp', 'select', 'small', 'span', 'strong', 'sub', 'sup',
'textarea', 'tt',
'u',
'var'
].reduce(function(p, c) {
p[c] = true;
return p;
}, Object.create(null));
var startTimer = function() {
if ( fingerprintTimer === null ) {
fingerprintTimer = vAPI.setTimeout(fetchFingerprint, 2000);
}
};
var stopTimer = function() {
if ( fingerprintTimer !== null ) {
clearTimeout(fingerprintTimer);
fingerprintTimer = null;
}
};
var injectHighlighter = function(tabId) {
if ( tabId === '' ) {
return;
}
messager.send({
what: 'scriptlet',
tabId: tabId,
scriptlet: 'dom-highlight'
});
};
var removeHighlighter = function(tabId) {
if ( tabId === '' ) {
return;
}
messager.send({
what: 'sendMessageTo',
tabId: tabId,
channelName: 'scriptlets',
msg: {
what: 'dom-highlight',
action: 'shutdown'
}
});
};
var nodeFromDomEntry = function(entry) {
var node;
var li = document.createElement('li');
@ -250,29 +186,6 @@ var tabIdFromClassName = function(className) {
}
};
var expandIfBlockElement = function(node) {
var ul = node.parentElement;
if ( ul === null ) {
return;
}
var li = ul.parentElement;
if ( li === null ) {
return;
}
if ( li.classList.contains('show') ) {
return;
}
var tag = node.firstElementChild.textContent;
var pos = tag.search(/[^a-z0-9]/);
if ( pos !== -1 ) {
tag = tag.slice(0, pos);
}
if ( inlineElementTags[tag] !== undefined ) {
return;
}
li.classList.add('show');
};
var renderDOM = function(response) {
var ul = document.createElement('ul');
var lvl = 0;
@ -314,9 +227,6 @@ var tabIdFromClassName = function(className) {
removeAllChildren(inspector);
inspector.appendChild(ul);
// Check for change at regular interval.
fingerprint = entries.length !== 0 ? entries[0].fp : '';
};
var selectorFromNode = function(node, nth) {
@ -344,7 +254,7 @@ var tabIdFromClassName = function(className) {
var onClick = function(ev) {
ev.stopPropagation();
if ( currentTabId === '' ) {
if ( inspectedTabId === '' ) {
return;
}
@ -366,12 +276,13 @@ var tabIdFromClassName = function(className) {
if ( target.localName === 'code' ) {
var original = target.classList.contains('filter') === false;
messager.send({
what: 'sendMessageTo',
tabId: currentTabId,
channelName: 'scriptlets',
what: 'postMessageTo',
senderTabId: null,
senderChannel: 'logger-ui.js',
receiverTabId: inspectedTabId,
receiverChannel: 'dom-inspector.js',
msg: {
what: 'dom-highlight',
action: 'toggleNodes',
what: 'toggleNodes',
original: original,
target: original !== target.classList.toggle('off'),
selector: selectorFromNode(target, original ? 1 : 2)
@ -383,12 +294,13 @@ var tabIdFromClassName = function(className) {
// Highlight and scrollto
if ( target.localName === 'code' ) {
messager.send({
what: 'sendMessageTo',
tabId: currentTabId,
channelName: 'scriptlets',
what: 'postMessageTo',
senderTabId: null,
senderChannel: 'logger-ui.js',
receiverTabId: inspectedTabId,
receiverChannel: 'dom-inspector.js',
msg: {
what: 'dom-highlight',
action: 'highlight',
what: 'highlight',
selector: selectorFromNode(target),
scrollTo: true
}
@ -404,12 +316,13 @@ var tabIdFromClassName = function(className) {
var timerHandler = function() {
mouseoverTimer = null;
messager.send({
what: 'sendMessageTo',
tabId: currentTabId,
channelName: 'scriptlets',
what: 'postMessageTo',
senderTabId: null,
senderChannel: 'logger-ui.js',
receiverTabId: inspectedTabId,
receiverChannel: 'dom-inspector.js',
msg: {
what: 'dom-highlight',
action: 'highlight',
what: 'highlight',
selector: selectorFromNode(mouseoverTarget),
scrollTo: true
}
@ -417,6 +330,10 @@ var tabIdFromClassName = function(className) {
};
return function(ev) {
if ( inspectedTabId === '' ) {
return;
}
// Find closest `li`
var target = ev.target;
while ( target !== null ) {
@ -435,115 +352,165 @@ var tabIdFromClassName = function(className) {
};
})();
var onFingerprintFetched = function(response) {
if ( state !== 'fetchingFingerprint' ) {
return;
var pollTimer = null;
var fingerprint = null;
var currentTabId = function() {
if ( showdomButton.classList.contains('active') === false ) {
return '';
}
state = '';
fingerprintTimer = null;
if ( !enabled ) {
return;
}
if ( response === fingerprint ) {
startTimer();
return;
}
fingerprint = response || '';
fetchDOM();
var tabId = tabIdFromClassName(tabSelector.value) || '';
return tabId !== 'bts' ? tabId : '';
};
var fetchFingerprint = function() {
messager.send({
what: 'scriptlet',
tabId: currentTabId,
scriptlet: 'dom-fingerprint'
}, onFingerprintFetched);
state = 'fetchingFingerprint';
var cancelPollTimer = function() {
if ( pollTimer !== null ) {
clearTimeout(pollTimer);
pollTimer = null;
}
};
var onDOMFetched = function(response) {
if ( state !== 'fetchingDOM' ) {
if ( response === undefined || currentTabId() !== inspectedTabId ) {
shutdownInspector(inspectedTabId);
injectInspectorAsync(250);
return;
}
state = '';
if ( !enabled ) {
if ( response.layout === 'NOCHANGE' ) {
fetchDOMAsync();
return;
}
if ( Array.isArray(response) && response.length !== 0 ) {
renderDOM(response);
injectHighlighter(currentTabId);
} else {
fingerprint = '';
}
startTimer();
renderDOM(response.layout);
fingerprint = response.fingerprint;
fetchDOMAsync();
};
var fetchDOM = function() {
if ( currentTabId === '' ) {
removeAllChildren(inspector);
startTimer();
messager.send({
what: 'postMessageTo',
senderTabId: null,
senderChannel: 'logger-ui.js',
receiverTabId: inspectedTabId,
receiverChannel: 'dom-inspector.js',
msg: {
what: 'domLayout',
fingerprint: fingerprint
}
});
pollTimer = vAPI.setTimeout(function() {
pollTimer = null;
onDOMFetched();
}, 1001);
};
var fetchDOMAsync = function(delay) {
if ( pollTimer !== null ) {
return;
}
pollTimer = vAPI.setTimeout(function() {
pollTimer = null;
fetchDOM();
}, delay || 1001);
};
var injectInspector = function() {
var tabId = currentTabId();
// No valid tab, go back
if ( tabId === '' ) {
injectInspectorAsync();
return;
}
inspectedTabId = tabId;
fingerprint = null;
messager.send({
what: 'scriptlet',
tabId: currentTabId,
scriptlet: 'dom-layout'
}, onDOMFetched);
state = 'fetchingDOM';
tabId: tabId,
scriptlet: 'dom-inspector'
});
fetchDOMAsync(250);
};
var injectInspectorAsync = function(delay) {
if ( pollTimer !== null ) {
return;
}
if ( showdomButton.classList.contains('active') === false ) {
return;
}
pollTimer = vAPI.setTimeout(function() {
pollTimer = null;
injectInspector();
}, delay || 1001);
};
var shutdownInspector = function(tabId) {
messager.send({
what: 'postMessageTo',
senderTabId: null,
senderChannel: 'logger-ui.js',
receiverTabId: tabId,
receiverChannel: 'dom-inspector.js',
msg: { what: 'shutdown', }
});
removeAllChildren(inspector);
cancelPollTimer();
inspectedTabId = '';
};
var onTabIdChanged = function() {
if ( !enabled ) {
return;
if ( inspectedTabId !== currentTabId() ) {
shutdownInspector();
injectInspectorAsync(250);
}
var previousTabId = currentTabId;
var tabId = tabIdFromClassName(tabSelector.value) || '';
currentTabId = tabId !== 'bts' && tabId !== '' ? tabId : '';
if ( currentTabId !== previousTabId ) {
removeHighlighter(previousTabId);
};
var onMessage = function(request) {
var msg = request.what === 'postMessageTo' ? request.msg : request;
switch ( msg.what ) {
case 'domLayout':
cancelPollTimer();
onDOMFetched(msg);
break;
default:
break;
}
if ( state === 'fetchingDOM' ) {
return;
}
fetchDOM();
};
var toggleOn = function() {
if ( enabled ) {
return;
}
enabled = true;
window.addEventListener('beforeunload', toggleOff);
inspector.addEventListener('click', onClick, true);
inspector.addEventListener('mouseover', onMouseOver, true);
tabSelector.addEventListener('change', onTabIdChanged);
onTabIdChanged();
inspector.classList.add('enabled');
messager.addListener(onMessage);
injectInspector();
};
var toggleOff = function() {
removeHighlighter(currentTabId);
messager.removeListener(onMessage);
cancelPollTimer();
shutdownInspector();
window.removeEventListener('beforeunload', toggleOff);
inspector.removeEventListener('click', onClick, true);
inspector.removeEventListener('mouseover', onMouseOver, true);
tabSelector.removeEventListener('change', onTabIdChanged);
removeAllChildren(inspector);
stopTimer();
currentTabId = currentSelector = fingerprint = '';
enabled = false;
currentSelector = inspectedTabId = '';
inspector.classList.remove('enabled');
};
var toggle = function() {
if ( uDom.nodeFromId('showdom').classList.toggle('active') ) {
if ( showdomButton.classList.toggle('active') ) {
toggleOn();
} else {
toggleOff();
}
};
uDom('#showdom').on('click', toggle);
showdomButton.addEventListener('click', toggle);
})();
/******************************************************************************/

View File

@ -141,6 +141,12 @@ var onMessage = function(request, sender, callback) {
vAPI.tabs.open(request.details);
break;
// Passthrough for auxiliary script to auxiliary script messaging
case 'postMessageTo':
request.senderTabId = tabId;
vAPI.messaging.post(request);
break;
case 'reloadTab':
if ( vAPI.isBehindTheSceneTabId(request.tabId) === false ) {
vAPI.tabs.reload(request.tabId);
@ -158,10 +164,6 @@ var onMessage = function(request, sender, callback) {
µb.selectFilterLists(request.switches);
break;
case 'sendMessageTo':
vAPI.messaging.send(request.tabId, request.channelName, request.msg);
break;
case 'toggleHostnameSwitch':
µb.toggleHostnameSwitch(request);
break;

View File

@ -1,66 +0,0 @@
/*******************************************************************************
uBlock Origin - a browser extension to block requests.
Copyright (C) 2015 Raymond Hill
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
*/
/* global vAPI, HTMLDocument */
/******************************************************************************/
(function() {
'use strict';
/******************************************************************************/
// https://github.com/gorhill/uBlock/issues/464
if ( document instanceof HTMLDocument === false ) {
return;
}
// This can happen
if ( typeof vAPI !== 'object' ) {
return;
}
/******************************************************************************/
// Some kind of fingerprint for the DOM, without incurring too much overhead.
var url = window.location.href;
var pos = url.indexOf('#');
if ( pos !== -1 ) {
url = url.slice(0, pos);
}
var fingerprint = url + '{' + document.getElementsByTagName('*').length.toString() + '}';
var localMessager = vAPI.messaging.channel('scriptlets');
localMessager.send({
what: 'scriptletResponse',
scriptlet: 'dom-fingerprint',
response: fingerprint
}, function() {
localMessager.close();
});
/******************************************************************************/
})();
/******************************************************************************/

View File

@ -1,339 +0,0 @@
/*******************************************************************************
uBlock Origin - a browser extension to block requests.
Copyright (C) 2015 Raymond Hill
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
*/
/* global vAPI, HTMLDocument */
/******************************************************************************/
(function() {
'use strict';
/******************************************************************************/
// https://github.com/gorhill/uBlock/issues/464
if ( document instanceof HTMLDocument === false ) {
return;
}
// This can happen
if ( typeof vAPI !== 'object' ) {
return;
}
/******************************************************************************/
if ( document.querySelector('iframe.dom-highlight.' + vAPI.sessionId) !== null ) {
return;
}
/******************************************************************************/
var localMessager = null;
var svgOcean = null;
var svgIslands = null;
var svgRoot = null;
var pickerRoot = null;
var currentSelector = '';
var toggledNodes = new Map();
/******************************************************************************/
var highlightElements = function(elems, scrollTo) {
var wv = pickerRoot.contentWindow.innerWidth;
var hv = pickerRoot.contentWindow.innerHeight;
var ocean = ['M0 0h' + wv + 'v' + hv + 'h-' + wv, 'z'];
var islands = [];
var elem, rect, poly;
var xl, xr, yt, yb, w, h, ws;
var xlu = Number.MAX_VALUE, xru = 0, ytu = Number.MAX_VALUE, ybu = 0;
for ( var i = 0; i < elems.length; i++ ) {
elem = elems[i];
if ( elem === pickerRoot ) {
continue;
}
if ( typeof elem.getBoundingClientRect !== 'function' ) {
continue;
}
rect = elem.getBoundingClientRect();
xl = rect.left;
xr = rect.right;
w = rect.width;
yt = rect.top;
yb = rect.bottom;
h = rect.height;
ws = w.toFixed(1);
poly = 'M' + xl.toFixed(1) + ' ' + yt.toFixed(1) +
'h' + ws +
'v' + h.toFixed(1) +
'h-' + ws +
'z';
ocean.push(poly);
islands.push(poly);
if ( !scrollTo ) {
continue;
}
if ( xl < xlu ) { xlu = xl; }
if ( xr > xru ) { xru = xr; }
if ( yt < ytu ) { ytu = yt; }
if ( yb > ybu ) { ybu = yb; }
}
svgOcean.setAttribute('d', ocean.join(''));
svgIslands.setAttribute('d', islands.join('') || 'M0 0');
if ( !scrollTo ) {
return;
}
// Highlighted area completely within viewport
if ( xlu >= 0 && xru <= wv && ytu >= 0 && ybu <= hv ) {
return;
}
var dx = 0, dy = 0;
if ( xru > wv ) {
dx = xru - wv;
xlu -= dx;
}
if ( xlu < 0 ) {
dx += xlu;
}
if ( ybu > hv ) {
dy = ybu - hv;
ytu -= dy;
}
if ( ytu < 0 ) {
dy += ytu;
}
if ( dx !== 0 || dy !== 0 ) {
window.scrollBy(dx, dy);
}
};
/******************************************************************************/
var elementsFromSelector = function(filter) {
var out = [];
try {
out = document.querySelectorAll(filter);
} catch (ex) {
}
return out;
};
/******************************************************************************/
var highlight = function(scrollTo) {
var elements = elementsFromSelector(currentSelector);
highlightElements(elements, scrollTo);
};
/******************************************************************************/
var onScrolled = function() {
highlight();
};
/******************************************************************************/
// original, target = what to do
// any, any = restore saved display property
// any, hidden = set display to `none`, remember original state
// hidden, any = remove display property, don't remember original state
// hidden, hidden = set display to `none`
var toggleNodes = function(selector, originalState, targetState) {
var nodes = document.querySelectorAll(selector);
var i = nodes.length;
if ( i === 0 ) {
return;
}
var node, value;
while ( i-- ) {
node = nodes[i];
if ( originalState ) { // any, ?
if ( targetState ) { // any, any
value = toggledNodes.get(node);
if ( value === undefined ) {
continue;
}
if ( value !== null ) {
node.style.removeProperty('display');
} else {
node.style.setProperty('display', value);
}
toggledNodes.delete(node);
} else { // any, hidden
toggledNodes.set(node, node.style.getPropertyValue('display') || null);
node.style.setProperty('display', 'none');
}
} else { // hidden, ?
if ( targetState ) { // hidden, any
node.style.setProperty('display', 'initial', 'important');
} else { // hidden, hidden
node.style.setProperty('display', 'none', 'important');
}
}
}
};
/******************************************************************************/
var resetToggledNodes = function() {
// Chromium does not support destructuring as of v43.
for ( var node of toggledNodes.keys() ) {
value = toggledNodes.get(node);
if ( value !== null ) {
node.style.removeProperty('display');
} else {
node.style.setProperty('display', value);
}
}
toggledNodes.clear();
};
/******************************************************************************/
var shutdown = function() {
resetToggledNodes();
localMessager.removeListener(onMessage);
localMessager.close();
localMessager = null;
window.removeEventListener('scroll', onScrolled, true);
document.documentElement.removeChild(pickerRoot);
pickerRoot = svgRoot = svgOcean = svgIslands = null;
currentSelector = '';
};
/******************************************************************************/
var onMessage = function(msg) {
if ( msg.what !== 'dom-highlight' ) {
return;
}
switch ( msg.action ) {
case 'highlight':
currentSelector = msg.selector;
highlight(msg.scrollTo);
break;
case 'toggleNodes':
toggleNodes(msg.selector, msg.original, msg.target);
currentSelector = msg.selector;
highlight(true);
break;
case 'shutdown':
shutdown();
break;
default:
break;
}
};
/******************************************************************************/
(function() {
pickerRoot = document.createElement('iframe');
pickerRoot.classList.add(vAPI.sessionId);
pickerRoot.classList.add('dom-highlight');
pickerRoot.style.cssText = [
'background: transparent',
'border: 0',
'border-radius: 0',
'box-shadow: none',
'display: block',
'height: 100%',
'left: 0',
'margin: 0',
'opacity: 1',
'position: fixed',
'outline: 0',
'padding: 0',
'top: 0',
'visibility: visible',
'width: 100%',
'z-index: 2147483647',
''
].join(' !important;\n');
pickerRoot.onload = function() {
pickerRoot.onload = null;
var pickerDoc = this.contentDocument;
var style = pickerDoc.createElement('style');
style.textContent = [
'body {',
'background-color: transparent;',
'cursor: crosshair;',
'}',
'svg {',
'height: 100%;',
'left: 0;',
'position: fixed;',
'top: 0;',
'width: 100%;',
'}',
'svg > path:first-child {',
'fill: rgba(0,0,0,0.75);',
'fill-rule: evenodd;',
'}',
'svg > path + path {',
'fill: rgba(0,0,255,0.1);',
'stroke: #FFF;',
'stroke-width: 0.5px;',
'}',
''
].join('\n');
pickerDoc.body.appendChild(style);
svgRoot = pickerDoc.createElementNS('http://www.w3.org/2000/svg', 'svg');
svgOcean = pickerDoc.createElementNS('http://www.w3.org/2000/svg', 'path');
svgRoot.appendChild(svgOcean);
svgIslands = pickerDoc.createElementNS('http://www.w3.org/2000/svg', 'path');
svgRoot.appendChild(svgIslands);
pickerDoc.body.appendChild(svgRoot);
window.addEventListener('scroll', onScrolled, true);
localMessager = vAPI.messaging.channel('scriptlets');
localMessager.addListener(onMessage);
highlight();
};
document.documentElement.appendChild(pickerRoot);
})();
/******************************************************************************/
})();
/******************************************************************************/

View File

@ -0,0 +1,691 @@
/*******************************************************************************
uBlock Origin - a browser extension to block requests.
Copyright (C) 2015 Raymond Hill
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
*/
/* global vAPI, HTMLDocument */
/******************************************************************************/
/******************************************************************************/
(function() {
'use strict';
/******************************************************************************/
// https://github.com/gorhill/uBlock/issues/464
if ( document instanceof HTMLDocument === false ) {
return;
}
// This can happen
if ( typeof vAPI !== 'object' ) {
return;
}
/******************************************************************************/
if ( document.querySelector('iframe.dom-inspector.' + vAPI.sessionId) !== null ) {
return;
}
/******************************************************************************/
/******************************************************************************/
// Modified to avoid installing as a global shim -- so the scriptlet can be
// flushed from memory once no longer in use.
/*! http://mths.be/cssescape v0.2.1 by @mathias | MIT license */
var cssEscape = (function(root) {
var css = root.CSS || {};
if ( css.escape ) {
return css.escape;
}
var InvalidCharacterError = function(message) {
this.message = message;
};
InvalidCharacterError.prototype = new Error();
InvalidCharacterError.prototype.name = 'InvalidCharacterError';
// http://dev.w3.org/csswg/cssom/#serialize-an-identifier
return function(value) {
var string = String(value);
var length = string.length;
var index = -1;
var codeUnit;
var result = '';
var firstCodeUnit = string.charCodeAt(0);
while (++index < length) {
codeUnit = string.charCodeAt(index);
// Note: theres no need to special-case astral symbols, surrogate
// pairs, or lone surrogates.
// If the character is NULL (U+0000), then throw an
// `InvalidCharacterError` exception and terminate these steps.
if (codeUnit === 0x0000) {
throw new InvalidCharacterError(
'Invalid character: the input contains U+0000.'
);
}
if (
// If the character is in the range [\1-\1F] (U+0001 to U+001F) or is
// U+007F, […]
(codeUnit >= 0x0001 && codeUnit <= 0x001F) || codeUnit == 0x007F ||
// If the character is the first character and is in the range [0-9]
// (U+0030 to U+0039), […]
(index === 0 && codeUnit >= 0x0030 && codeUnit <= 0x0039) ||
// If the character is the second character and is in the range [0-9]
// (U+0030 to U+0039) and the first character is a `-` (U+002D), […]
(
index == 1 &&
codeUnit >= 0x0030 && codeUnit <= 0x0039 &&
firstCodeUnit == 0x002D
)
) {
// http://dev.w3.org/csswg/cssom/#escape-a-character-as-code-point
result += '\\' + codeUnit.toString(16) + ' ';
continue;
}
// If the character is not handled by one of the above rules and is
// greater than or equal to U+0080, is `-` (U+002D) or `_` (U+005F), or
// is in one of the ranges [0-9] (U+0030 to U+0039), [A-Z] (U+0041 to
// U+005A), or [a-z] (U+0061 to U+007A), […]
if (
codeUnit >= 0x0080 ||
codeUnit == 0x002D ||
codeUnit == 0x005F ||
codeUnit >= 0x0030 && codeUnit <= 0x0039 ||
codeUnit >= 0x0041 && codeUnit <= 0x005A ||
codeUnit >= 0x0061 && codeUnit <= 0x007A
) {
// the character itself
result += string.charAt(index);
continue;
}
// Otherwise, the escaped character.
// http://dev.w3.org/csswg/cssom/#escape-a-character
result += '\\' + string.charAt(index);
}
return result;
};
}(self));
/******************************************************************************/
/******************************************************************************/
var localMessager = vAPI.messaging.channel('dom-inspector.js');
var svgOcean = null;
var svgIslands = null;
var svgRoot = null;
var pickerRoot = null;
var currentSelector = '';
var toggledNodes = new Map();
/******************************************************************************/
var domLayout = (function() {
var skipTagNames = {
'br': true,
'link': true,
'meta': true,
'script': true,
'style': true
};
var resourceAttrNames = {
'a': 'href',
'iframe': 'src',
'img': 'src',
'object': 'data'
};
// Collect all nodes which are directly affected by cosmetic filters: these
// will be reported in the layout data.
var nodeToCosmeticFilterMap = (function() {
var out = new WeakMap();
var styleTags = vAPI.styles || [];
var i = styleTags.length;
var selectors, styleText, j, selector, nodes, k;
while ( i-- ) {
styleText = styleTags[i].textContent;
selectors = styleText.slice(0, styleText.lastIndexOf('\n')).split(/,\n/);
j = selectors.length;
while ( j-- ) {
selector = selectors[j];
nodes = document.querySelectorAll(selector);
k = nodes.length;
while ( k-- ) {
out.set(nodes[k], selector);
}
}
}
return out;
})();
var DomRoot = function() {
this.lvl = 0;
this.sel = 'body';
var url = window.location.href;
var pos = url.indexOf('#');
if ( pos !== -1 ) {
url = url.slice(0, pos);
}
this.src = url;
this.top = window === window.top;
this.cnt = 0;
};
var DomNode = function(level, selector, filter) {
this.lvl = level;
this.sel = selector;
this.cnt = 0;
this.filter = filter;
};
var hasManyMatches = function(node, selector) {
var fnName = matchesSelector;
if ( fnName === '' ) {
return true;
}
var child = node.firstElementChild;
var match = false;
while ( child !== null ) {
if ( child[fnName](selector) ) {
if ( match ) {
return true;
}
match = true;
}
child = child.nextElementSibling;
}
return false;
};
var matchesSelector = (function() {
if ( typeof Element.prototype.matches === 'function' ) {
return 'matches';
}
if ( typeof Element.prototype.mozMatchesSelector === 'function' ) {
return 'mozMatchesSelector';
}
if ( typeof Element.prototype.webkitMatchesSelector === 'function' ) {
return 'webkitMatchesSelector';
}
return '';
})();
var selectorFromNode = function(node) {
var str, attr, pos, sw, i;
var tag = node.localName;
var selector = cssEscape(tag);
// Id
if ( typeof node.id === 'string' ) {
str = node.id.trim();
if ( str !== '' ) {
selector += '#' + cssEscape(str);
}
}
// Class
var cl = node.classList;
if ( cl ) {
for ( i = 0; i < cl.length; i++ ) {
selector += '.' + cssEscape(cl[i]);
}
}
// Tag-specific attributes
if ( resourceAttrNames.hasOwnProperty(tag) ) {
attr = resourceAttrNames[tag];
str = node.getAttribute(attr) || '';
str = str.trim();
pos = str.indexOf('#');
if ( pos !== -1 ) {
str = str.slice(0, pos);
sw = '^';
} else {
sw = '';
}
if ( str !== '' ) {
selector += '[' + attr + sw + '="' + cssEscape(str) + '"]';
}
}
// The resulting selector must cause only one element to be selected. If
// it's not the case, further narrow using `nth-of-type` pseudo-class.
if ( hasManyMatches(node.parentElement, selector) ) {
i = 1;
while ( node.previousElementSibling ) {
node = node.previousElementSibling;
if ( node.localName === tag ) {
i += 1;
}
}
selector += ':nth-of-type(' + i + ')';
}
return selector;
};
var domNodeFactory = function(level, node) {
var localName = node.localName;
if ( skipTagNames.hasOwnProperty(localName) ) {
return null;
}
// skip uBlock's own nodes
if ( node.classList.contains(vAPI.sessionId) ) {
return null;
}
if ( level === 0 && localName === 'body' ) {
return new DomRoot();
}
var selector = selectorFromNode(node);
var filter = nodeToCosmeticFilterMap.get(node);
return new DomNode(level, selector, filter);
};
// Collect layout data.
var getLayoutData = function() {
var domLayout = [];
var stack = [];
var node = document.body;
var domNode;
var lvl = 0;
for (;;) {
domNode = domNodeFactory(lvl, node);
if ( domNode !== null ) {
domLayout.push(domNode);
}
// children
if ( node.firstElementChild !== null ) {
stack.push(node);
lvl += 1;
node = node.firstElementChild;
continue;
}
// sibling
if ( node.nextElementSibling === null ) {
do {
node = stack.pop();
if ( !node ) { break; }
lvl -= 1;
} while ( node.nextElementSibling === null );
if ( !node ) { break; }
}
node = node.nextElementSibling;
}
return domLayout;
};
// Descendant count for each node.
var patchLayoutData = function(domLayout) {
var stack = [], ptr;
var lvl = 0;
var domNode, cnt;
var i = domLayout.length;
while ( i-- ) {
domNode = domLayout[i];
if ( domNode.lvl === lvl ) {
stack[ptr] += 1;
continue;
}
if ( domNode.lvl > lvl ) {
while ( lvl < domNode.lvl ) {
stack.push(0);
lvl += 1;
}
ptr = lvl - 1;
stack[ptr] += 1;
continue;
}
// domNode.lvl < lvl
cnt = stack.pop();
domNode.cnt = cnt;
lvl -= 1;
ptr = lvl - 1;
stack[ptr] += cnt + 1;
}
return domLayout;
};
return function() {
return patchLayoutData(getLayoutData());
};
})();
/******************************************************************************/
// Some kind of fingerprint for the DOM, without incurring too much overhead.
var domFingerprint = function() {
return vAPI.sessionId + '{' + document.getElementsByTagName('*').length + '}';
};
/******************************************************************************/
var highlightElements = function(elems, scrollTo) {
var wv = pickerRoot.contentWindow.innerWidth;
var hv = pickerRoot.contentWindow.innerHeight;
var ocean = ['M0 0h' + wv + 'v' + hv + 'h-' + wv, 'z'];
var islands = [];
var elem, rect, poly;
var xl, xr, yt, yb, w, h, ws;
var xlu = Number.MAX_VALUE, xru = 0, ytu = Number.MAX_VALUE, ybu = 0;
for ( var i = 0; i < elems.length; i++ ) {
elem = elems[i];
if ( elem === pickerRoot ) {
continue;
}
if ( typeof elem.getBoundingClientRect !== 'function' ) {
continue;
}
rect = elem.getBoundingClientRect();
xl = rect.left;
xr = rect.right;
w = rect.width;
yt = rect.top;
yb = rect.bottom;
h = rect.height;
ws = w.toFixed(1);
poly = 'M' + xl.toFixed(1) + ' ' + yt.toFixed(1) +
'h' + ws +
'v' + h.toFixed(1) +
'h-' + ws +
'z';
ocean.push(poly);
islands.push(poly);
if ( !scrollTo ) {
continue;
}
if ( xl < xlu ) { xlu = xl; }
if ( xr > xru ) { xru = xr; }
if ( yt < ytu ) { ytu = yt; }
if ( yb > ybu ) { ybu = yb; }
}
svgOcean.setAttribute('d', ocean.join(''));
svgIslands.setAttribute('d', islands.join('') || 'M0 0');
if ( !scrollTo ) {
return;
}
// Highlighted area completely within viewport
if ( xlu >= 0 && xru <= wv && ytu >= 0 && ybu <= hv ) {
return;
}
var dx = 0, dy = 0;
if ( xru > wv ) {
dx = xru - wv;
xlu -= dx;
}
if ( xlu < 0 ) {
dx += xlu;
}
if ( ybu > hv ) {
dy = ybu - hv;
ytu -= dy;
}
if ( ytu < 0 ) {
dy += ytu;
}
if ( dx !== 0 || dy !== 0 ) {
window.scrollBy(dx, dy);
}
};
/******************************************************************************/
var elementsFromSelector = function(filter) {
var out = [];
try {
out = document.querySelectorAll(filter);
} catch (ex) {
}
return out;
};
/******************************************************************************/
var highlight = function(scrollTo) {
var elements = elementsFromSelector(currentSelector);
highlightElements(elements, scrollTo);
};
/******************************************************************************/
var onScrolled = function() {
highlight();
};
/******************************************************************************/
// original, target = what to do
// any, any = restore saved display property
// any, hidden = set display to `none`, remember original state
// hidden, any = remove display property, don't remember original state
// hidden, hidden = set display to `none`
var toggleNodes = function(selector, originalState, targetState) {
var nodes = document.querySelectorAll(selector);
var i = nodes.length;
if ( i === 0 ) {
return;
}
var node, value;
while ( i-- ) {
node = nodes[i];
if ( originalState ) { // any, ?
if ( targetState ) { // any, any
value = toggledNodes.get(node);
if ( value === undefined ) {
continue;
}
if ( value !== null ) {
node.style.removeProperty('display');
} else {
node.style.setProperty('display', value);
}
toggledNodes.delete(node);
} else { // any, hidden
toggledNodes.set(node, node.style.getPropertyValue('display') || null);
node.style.setProperty('display', 'none');
}
} else { // hidden, ?
if ( targetState ) { // hidden, any
node.style.setProperty('display', 'initial', 'important');
} else { // hidden, hidden
node.style.setProperty('display', 'none', 'important');
}
}
}
};
/******************************************************************************/
var resetToggledNodes = function() {
var value;
// Chromium does not support destructuring as of v43.
for ( var node of toggledNodes.keys() ) {
value = toggledNodes.get(node);
if ( value !== null ) {
node.style.removeProperty('display');
} else {
node.style.setProperty('display', value);
}
}
toggledNodes.clear();
};
/******************************************************************************/
var shutdown = function() {
resetToggledNodes();
localMessager.removeListener(onMessage);
localMessager.close();
localMessager = null;
window.removeEventListener('scroll', onScrolled, true);
document.documentElement.removeChild(pickerRoot);
pickerRoot = svgRoot = svgOcean = svgIslands = null;
currentSelector = '';
};
/******************************************************************************/
var onMessage = function(request) {
var msg = request.what === 'postMessageTo' ? request.msg : request;
var response;
switch ( msg.what ) {
case 'domLayout':
var fingerprint = domFingerprint();
response = {
what: 'domLayout',
layout: msg.fingerprint !== fingerprint ? domLayout() : 'NOCHANGE',
fingerprint: fingerprint
};
break;
case 'highlight':
currentSelector = msg.selector;
highlight(msg.scrollTo);
break;
case 'toggleNodes':
toggleNodes(msg.selector, msg.original, msg.target);
currentSelector = msg.selector;
highlight(true);
break;
case 'shutdown':
shutdown();
break;
default:
break;
}
if ( response !== undefined && request.what === 'postMessageTo' ) {
localMessager.send({
what: 'postMessageTo',
senderTabId: null,
senderChannel: 'dom-inspector.js',
receiverTabId: request.senderTabId,
receiverChannel: request.senderChannel,
msg: response
});
}
};
/******************************************************************************/
// Install DOM inspector widget
pickerRoot = document.createElement('iframe');
pickerRoot.classList.add(vAPI.sessionId);
pickerRoot.classList.add('dom-inspector');
pickerRoot.style.cssText = [
'background: transparent',
'border: 0',
'border-radius: 0',
'box-shadow: none',
'display: block',
'height: 100%',
'left: 0',
'margin: 0',
'opacity: 1',
'position: fixed',
'outline: 0',
'padding: 0',
'top: 0',
'visibility: visible',
'width: 100%',
'z-index: 2147483647',
''
].join(' !important;\n');
pickerRoot.onload = function() {
pickerRoot.onload = null;
var pickerDoc = this.contentDocument;
var style = pickerDoc.createElement('style');
style.textContent = [
'body {',
'background-color: transparent;',
'cursor: crosshair;',
'}',
'svg {',
'height: 100%;',
'left: 0;',
'position: fixed;',
'top: 0;',
'width: 100%;',
'}',
'svg > path:first-child {',
'fill: rgba(0,0,0,0.75);',
'fill-rule: evenodd;',
'}',
'svg > path + path {',
'fill: rgba(0,0,255,0.1);',
'stroke: #FFF;',
'stroke-width: 0.5px;',
'}',
''
].join('\n');
pickerDoc.body.appendChild(style);
svgRoot = pickerDoc.createElementNS('http://www.w3.org/2000/svg', 'svg');
svgOcean = pickerDoc.createElementNS('http://www.w3.org/2000/svg', 'path');
svgRoot.appendChild(svgOcean);
svgIslands = pickerDoc.createElementNS('http://www.w3.org/2000/svg', 'path');
svgRoot.appendChild(svgIslands);
pickerDoc.body.appendChild(svgRoot);
window.addEventListener('scroll', onScrolled, true);
highlight();
localMessager.addListener(onMessage);
};
document.documentElement.appendChild(pickerRoot);
/******************************************************************************/
})();
/******************************************************************************/

View File

@ -1,406 +0,0 @@
/*******************************************************************************
uBlock Origin - a browser extension to block requests.
Copyright (C) 2015 Raymond Hill
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
*/
/* global vAPI, HTMLDocument */
/******************************************************************************/
/******************************************************************************/
/*! http://mths.be/cssescape v0.2.1 by @mathias | MIT license */
;(function(root) {
'use strict';
if (!root.CSS) {
root.CSS = {};
}
var CSS = root.CSS;
var InvalidCharacterError = function(message) {
this.message = message;
};
InvalidCharacterError.prototype = new Error();
InvalidCharacterError.prototype.name = 'InvalidCharacterError';
if (!CSS.escape) {
// http://dev.w3.org/csswg/cssom/#serialize-an-identifier
CSS.escape = function(value) {
var string = String(value);
var length = string.length;
var index = -1;
var codeUnit;
var result = '';
var firstCodeUnit = string.charCodeAt(0);
while (++index < length) {
codeUnit = string.charCodeAt(index);
// Note: theres no need to special-case astral symbols, surrogate
// pairs, or lone surrogates.
// If the character is NULL (U+0000), then throw an
// `InvalidCharacterError` exception and terminate these steps.
if (codeUnit === 0x0000) {
throw new InvalidCharacterError(
'Invalid character: the input contains U+0000.'
);
}
if (
// If the character is in the range [\1-\1F] (U+0001 to U+001F) or is
// U+007F, […]
(codeUnit >= 0x0001 && codeUnit <= 0x001F) || codeUnit == 0x007F ||
// If the character is the first character and is in the range [0-9]
// (U+0030 to U+0039), […]
(index === 0 && codeUnit >= 0x0030 && codeUnit <= 0x0039) ||
// If the character is the second character and is in the range [0-9]
// (U+0030 to U+0039) and the first character is a `-` (U+002D), […]
(
index == 1 &&
codeUnit >= 0x0030 && codeUnit <= 0x0039 &&
firstCodeUnit == 0x002D
)
) {
// http://dev.w3.org/csswg/cssom/#escape-a-character-as-code-point
result += '\\' + codeUnit.toString(16) + ' ';
continue;
}
// If the character is not handled by one of the above rules and is
// greater than or equal to U+0080, is `-` (U+002D) or `_` (U+005F), or
// is in one of the ranges [0-9] (U+0030 to U+0039), [A-Z] (U+0041 to
// U+005A), or [a-z] (U+0061 to U+007A), […]
if (
codeUnit >= 0x0080 ||
codeUnit == 0x002D ||
codeUnit == 0x005F ||
codeUnit >= 0x0030 && codeUnit <= 0x0039 ||
codeUnit >= 0x0041 && codeUnit <= 0x005A ||
codeUnit >= 0x0061 && codeUnit <= 0x007A
) {
// the character itself
result += string.charAt(index);
continue;
}
// Otherwise, the escaped character.
// http://dev.w3.org/csswg/cssom/#escape-a-character
result += '\\' + string.charAt(index);
}
return result;
};
}
}(self));
/******************************************************************************/
/******************************************************************************/
(function() {
'use strict';
/******************************************************************************/
// https://github.com/gorhill/uBlock/issues/464
if ( document instanceof HTMLDocument === false ) {
return;
}
// This can happen
if ( typeof vAPI !== 'object' ) {
return;
}
/******************************************************************************/
var skipTagNames = {
'br': true,
'link': true,
'meta': true,
'script': true,
'style': true
};
var resourceAttrNames = {
'a': 'href',
'iframe': 'src',
'img': 'src',
'object': 'data'
};
/******************************************************************************/
// Collect all nodes which are directly affected by cosmetic filters: these
// will be reported in the layout data.
var nodeToCosmeticFilterMap = (function() {
var out = new WeakMap();
var styleTags = vAPI.styles || [];
var i = styleTags.length;
var selectors, styleText, j, selector, nodes, k;
while ( i-- ) {
styleText = styleTags[i].textContent;
selectors = styleText.slice(0, styleText.lastIndexOf('\n')).split(/,\n/);
j = selectors.length;
while ( j-- ) {
selector = selectors[j];
nodes = document.querySelectorAll(selector);
k = nodes.length;
while ( k-- ) {
out.set(nodes[k], selector);
}
}
}
return out;
})();
/******************************************************************************/
var DomRoot = function() {
this.lvl = 0;
this.sel = 'body';
var url = window.location.href;
var pos = url.indexOf('#');
if ( pos !== -1 ) {
url = url.slice(0, pos);
}
this.src = url;
this.top = window === window.top;
this.cnt = 0;
this.fp = fingerprint();
};
var DomNode = function(level, selector, filter) {
this.lvl = level;
this.sel = selector;
this.cnt = 0;
this.filter = filter;
};
/******************************************************************************/
var hasManyMatches = function(node, selector) {
var fnName = matchesSelector;
if ( fnName === '' ) {
return true;
}
var child = node.firstElementChild;
var match = false;
while ( child !== null ) {
if ( child[fnName](selector) ) {
if ( match ) {
return true;
}
match = true;
}
child = child.nextElementSibling;
}
return false;
};
var matchesSelector = (function() {
if ( typeof Element.prototype.matches === 'function' ) {
return 'matches';
}
if ( typeof Element.prototype.mozMatchesSelector === 'function' ) {
return 'mozMatchesSelector';
}
if ( typeof Element.prototype.webkitMatchesSelector === 'function' ) {
return 'webkitMatchesSelector';
}
return '';
})();
/******************************************************************************/
var selectorFromNode = function(node) {
var str, attr, pos, sw, i;
var tag = node.localName;
var selector = CSS.escape(tag);
// Id
if ( typeof node.id === 'string' ) {
str = node.id.trim();
if ( str !== '' ) {
selector += '#' + CSS.escape(str);
}
}
// Class
var cl = node.classList;
if ( cl ) {
for ( i = 0; i < cl.length; i++ ) {
selector += '.' + CSS.escape(cl[i]);
}
}
// Tag-specific attributes
if ( resourceAttrNames.hasOwnProperty(tag) ) {
attr = resourceAttrNames[tag];
str = node.getAttribute(attr) || '';
str = str.trim();
pos = str.indexOf('#');
if ( pos !== -1 ) {
str = str.slice(0, pos);
sw = '^';
} else {
sw = '';
}
if ( str !== '' ) {
selector += '[' + attr + sw + '="' + CSS.escape(str) + '"]';
}
}
// The resulting selector must cause only one element to be selected. If
// it's not the case, further narrow using `nth-of-type` pseudo-class.
if ( hasManyMatches(node.parentElement, selector) ) {
i = 1;
while ( node.previousElementSibling ) {
node = node.previousElementSibling;
if ( node.localName === tag ) {
i += 1;
}
}
selector += ':nth-of-type(' + i + ')';
}
return selector;
};
/******************************************************************************/
var domNodeFactory = function(level, node) {
var localName = node.localName;
if ( skipTagNames.hasOwnProperty(localName) ) {
return null;
}
// skip uBlock's own nodes
if ( node.classList.contains(vAPI.sessionId) ) {
return null;
}
if ( level === 0 && localName === 'body' ) {
return new DomRoot();
}
var selector = selectorFromNode(node);
var filter = nodeToCosmeticFilterMap.get(node);
return new DomNode(level, selector, filter);
};
/******************************************************************************/
// Some kind of fingerprint for the DOM, without incurring too much
// overhead.
var fingerprint = function() {
var url = window.location.href;
var pos = url.indexOf('#');
if ( pos !== -1 ) {
url = url.slice(0, pos);
}
return url + '{' + document.getElementsByTagName('*').length.toString() + '}';
};
/******************************************************************************/
// Collect layout data.
var domLayout = [];
(function() {
var dom = domLayout;
var stack = [];
var node = document.body;
var domNode;
var lvl = 0;
for (;;) {
domNode = domNodeFactory(lvl, node);
if ( domNode !== null ) {
dom.push(domNode);
}
// children
if ( node.firstElementChild !== null ) {
stack.push(node);
lvl += 1;
node = node.firstElementChild;
continue;
}
// sibling
if ( node.nextElementSibling === null ) {
do {
node = stack.pop();
if ( !node ) { break; }
lvl -= 1;
} while ( node.nextElementSibling === null );
if ( !node ) { break; }
}
node = node.nextElementSibling;
}
})();
/******************************************************************************/
// Descendant count for each node.
(function() {
var dom = domLayout;
var stack = [], ptr;
var lvl = 0;
var domNode, cnt;
var i = dom.length;
while ( i-- ) {
domNode = dom[i];
if ( domNode.lvl === lvl ) {
stack[ptr] += 1;
continue;
}
if ( domNode.lvl > lvl ) {
while ( lvl < domNode.lvl ) {
stack.push(0);
lvl += 1;
}
ptr = lvl - 1;
stack[ptr] += 1;
continue;
}
// domNode.lvl < lvl
cnt = stack.pop();
domNode.cnt = cnt;
lvl -= 1;
ptr = lvl - 1;
stack[ptr] += cnt + 1;
}
})();
/******************************************************************************/
var localMessager = vAPI.messaging.channel('scriptlets');
localMessager.send({
what: 'scriptletResponse',
scriptlet: 'dom-layout',
response: domLayout
}, function() {
localMessager.close();
localMessager = null;
});
/******************************************************************************/
})();
/******************************************************************************/