mirror of
https://github.com/gorhill/uBlock.git
synced 2024-10-06 09:37:12 +02:00
Element picker tweaks
- Indentation whitespace fixes. - Use built-in getBoundingClientRect() function instead of self-made. - Use built-in DOM API for manipulating the class attributes instead of altering the className property. - Add pointer-events: none to the svgRoot when using document.elementFromPoint(), but if the browser (older Safari for example) doesn't take the pointer-events into account, then fall back to display: none. - Initiate every part of the picker at the same time; when the message is received from the background. This way the selected element will have the red overlay immediately, instead of showing first the black overlay, then a few milliseconds later the red.
This commit is contained in:
Deathamns
parent
6d49ef0dac
commit
cc27193147
@ -28,85 +28,85 @@
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/*! http://mths.be/cssescape v0.2.1 by @mathias | MIT license */
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;(function(root) {
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if (!root.CSS) {
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root.CSS = {};
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}
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if (!root.CSS) {
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root.CSS = {};
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}
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var CSS = root.CSS;
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var CSS = root.CSS;
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var InvalidCharacterError = function(message) {
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this.message = message;
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};
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InvalidCharacterError.prototype = new Error();
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InvalidCharacterError.prototype.name = 'InvalidCharacterError';
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var InvalidCharacterError = function(message) {
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this.message = message;
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};
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InvalidCharacterError.prototype = new Error();
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InvalidCharacterError.prototype.name = 'InvalidCharacterError';
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if (!CSS.escape) {
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// http://dev.w3.org/csswg/cssom/#serialize-an-identifier
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CSS.escape = function(value) {
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var string = String(value);
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var length = string.length;
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var index = -1;
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var codeUnit;
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var result = '';
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var firstCodeUnit = string.charCodeAt(0);
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while (++index < length) {
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codeUnit = string.charCodeAt(index);
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// Note: there’s no need to special-case astral symbols, surrogate
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// pairs, or lone surrogates.
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if (!CSS.escape) {
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// http://dev.w3.org/csswg/cssom/#serialize-an-identifier
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CSS.escape = function(value) {
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var string = String(value);
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var length = string.length;
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var index = -1;
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var codeUnit;
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var result = '';
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var firstCodeUnit = string.charCodeAt(0);
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while (++index < length) {
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codeUnit = string.charCodeAt(index);
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// Note: there’s no need to special-case astral symbols, surrogate
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// pairs, or lone surrogates.
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// If the character is NULL (U+0000), then throw an
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// `InvalidCharacterError` exception and terminate these steps.
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if (codeUnit === 0x0000) {
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throw new InvalidCharacterError(
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'Invalid character: the input contains U+0000.'
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);
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}
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// If the character is NULL (U+0000), then throw an
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// `InvalidCharacterError` exception and terminate these steps.
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if (codeUnit === 0x0000) {
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throw new InvalidCharacterError(
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'Invalid character: the input contains U+0000.'
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);
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}
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if (
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// If the character is in the range [\1-\1F] (U+0001 to U+001F) or is
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// U+007F, […]
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(codeUnit >= 0x0001 && codeUnit <= 0x001F) || codeUnit == 0x007F ||
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// If the character is the first character and is in the range [0-9]
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// (U+0030 to U+0039), […]
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(index === 0 && codeUnit >= 0x0030 && codeUnit <= 0x0039) ||
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// If the character is the second character and is in the range [0-9]
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// (U+0030 to U+0039) and the first character is a `-` (U+002D), […]
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(
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index == 1 &&
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codeUnit >= 0x0030 && codeUnit <= 0x0039 &&
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firstCodeUnit == 0x002D
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)
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) {
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// http://dev.w3.org/csswg/cssom/#escape-a-character-as-code-point
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result += '\\' + codeUnit.toString(16) + ' ';
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continue;
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}
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if (
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// If the character is in the range [\1-\1F] (U+0001 to U+001F) or is
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// U+007F, […]
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(codeUnit >= 0x0001 && codeUnit <= 0x001F) || codeUnit == 0x007F ||
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// If the character is the first character and is in the range [0-9]
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// (U+0030 to U+0039), […]
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(index === 0 && codeUnit >= 0x0030 && codeUnit <= 0x0039) ||
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// If the character is the second character and is in the range [0-9]
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// (U+0030 to U+0039) and the first character is a `-` (U+002D), […]
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(
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index == 1 &&
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codeUnit >= 0x0030 && codeUnit <= 0x0039 &&
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firstCodeUnit == 0x002D
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)
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) {
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// http://dev.w3.org/csswg/cssom/#escape-a-character-as-code-point
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result += '\\' + codeUnit.toString(16) + ' ';
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continue;
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}
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// If the character is not handled by one of the above rules and is
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// greater than or equal to U+0080, is `-` (U+002D) or `_` (U+005F), or
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// is in one of the ranges [0-9] (U+0030 to U+0039), [A-Z] (U+0041 to
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// U+005A), or [a-z] (U+0061 to U+007A), […]
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if (
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codeUnit >= 0x0080 ||
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codeUnit == 0x002D ||
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codeUnit == 0x005F ||
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codeUnit >= 0x0030 && codeUnit <= 0x0039 ||
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codeUnit >= 0x0041 && codeUnit <= 0x005A ||
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codeUnit >= 0x0061 && codeUnit <= 0x007A
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) {
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// the character itself
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result += string.charAt(index);
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continue;
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}
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// If the character is not handled by one of the above rules and is
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// greater than or equal to U+0080, is `-` (U+002D) or `_` (U+005F), or
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// is in one of the ranges [0-9] (U+0030 to U+0039), [A-Z] (U+0041 to
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// U+005A), or [a-z] (U+0061 to U+007A), […]
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if (
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codeUnit >= 0x0080 ||
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codeUnit == 0x002D ||
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codeUnit == 0x005F ||
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codeUnit >= 0x0030 && codeUnit <= 0x0039 ||
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codeUnit >= 0x0041 && codeUnit <= 0x005A ||
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codeUnit >= 0x0061 && codeUnit <= 0x007A
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) {
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// the character itself
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result += string.charAt(index);
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continue;
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}
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// Otherwise, the escaped character.
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// http://dev.w3.org/csswg/cssom/#escape-a-character
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result += '\\' + string.charAt(index);
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// Otherwise, the escaped character.
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// http://dev.w3.org/csswg/cssom/#escape-a-character
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result += '\\' + string.charAt(index);
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}
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return result;
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};
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}
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}
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return result;
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};
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}
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}(this));
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@ -120,16 +120,21 @@
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/******************************************************************************/
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var localMessager = vAPI.messaging.channel('element-picker.js');
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// https://github.com/gorhill/uBlock/issues/314#issuecomment-58878112
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// Using an id makes uBlock's CSS rules more specific, thus prevents
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// surrounding external rules from winning over own rules.
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var µBlockId = CSS.escape('µBlock');
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var pickerRoot = document.getElementById(µBlockId);
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if ( pickerRoot ) {
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return;
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}
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var localMessager = vAPI.messaging.channel('element-picker.js');
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var svgns = 'http://www.w3.org/2000/svg';
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var pickerRoot = null;
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var svgRoot = null;
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var svgOcean = null;
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var svgIslands = null;
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@ -143,23 +148,25 @@ var cosmeticFilterCandidates = [];
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var targetElements = [];
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var svgWidth = 0;
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var svgHeight = 0;
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var elementFromPointCSSProperty = 'pointerEvents';
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var onSvgHoveredTimer = null;
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/******************************************************************************/
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var pickerPaused = function() {
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return /(^| )paused( |$)/.test(pickerRoot.className);
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return pickerRoot.classList.contains('paused');
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};
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/******************************************************************************/
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var pausePicker = function() {
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pickerRoot.className += ' paused';
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pickerRoot.classList.add('paused');
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};
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/******************************************************************************/
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var unpausePicker = function() {
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pickerRoot.className = pickerRoot.className.replace(/(^| )paused( |$)/g, '').trim();
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pickerRoot.classList.remove('paused');
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};
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/******************************************************************************/
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@ -178,24 +185,6 @@ var pickerRootDistance = function(elem) {
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/******************************************************************************/
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// https://github.com/gorhill/uBlock/issues/210
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// HTMLElement.getBoundingClientRect() is unreliable (or I misunderstand what
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// it does). I will just compute it myself.
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var getBoundingClientRect = function(elem, r) {
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r.w = elem.offsetWidth;
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r.h = elem.offsetHeight;
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r.x = elem.offsetLeft - elem.scrollLeft;
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r.y = elem.offsetTop - elem.scrollTop;
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while ( elem = elem.offsetParent ) {
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r.x += elem.offsetLeft - elem.scrollLeft;
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r.y += elem.offsetTop - elem.scrollTop;
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}
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};
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/******************************************************************************/
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var highlightElements = function(elems, force) {
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// To make mouse move handler more efficient
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if ( !force && elems.length === targetElements.length ) {
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@ -216,7 +205,6 @@ var highlightElements = function(elems, force) {
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var offx = window.pageXOffset;
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var offy = window.pageYOffset;
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var islands = [];
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// To avoid memory churning, reuse object
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var elem, rect, poly;
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for ( var i = 0; i < elems.length; i++ ) {
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elem = elems[i];
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@ -233,7 +221,7 @@ var highlightElements = function(elems, force) {
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islands.push(poly);
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}
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svgOcean.setAttribute('d', ocean.join(''));
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svgIslands.setAttribute('d', islands.join('') || 'M 0 0');
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svgIslands.setAttribute('d', islands.join('') || 'M0 0');
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};
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/******************************************************************************/
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@ -590,23 +578,27 @@ var showDialog = function(options) {
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/******************************************************************************/
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var elementFromPoint = function(x, y) {
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svgRoot.style.display = 'none';
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svgRoot.style[elementFromPointCSSProperty] = 'none';
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var elem = document.elementFromPoint(x, y);
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if ( elem === document.body || elem === document.documentElement ) {
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elem = null;
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}
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svgRoot.style.display = '';
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svgRoot.style[elementFromPointCSSProperty] = '';
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return elem;
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};
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/******************************************************************************/
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var onSvgHovered = function(ev) {
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if ( pickerPaused() ) {
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if ( pickerPaused() || onSvgHoveredTimer) {
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return;
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}
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var elem = elementFromPoint(ev.clientX, ev.clientY);
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highlightElements(elem ? [elem] : []);
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onSvgHoveredTimer = setTimeout(function() {
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var elem = elementFromPoint(ev.clientX, ev.clientY);
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highlightElements(elem ? [elem] : []);
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onSvgHoveredTimer = null;
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}, 50);
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};
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/******************************************************************************/
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@ -675,11 +667,7 @@ var stopPicker = function() {
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/******************************************************************************/
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var startPicker = function() {
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pickerRoot = document.getElementById(µBlockId);
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if ( pickerRoot !== null ) {
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return;
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}
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var startPicker = function(details) {
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pickerRoot = document.createElement('div');
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pickerRoot.id = µBlockId;
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@ -742,6 +730,7 @@ var startPicker = function() {
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'position: absolute;',
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'top: 0;',
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'left: 0;',
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'pointer-events: auto;',
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'cursor: crosshair;',
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'z-index: 4999999999;',
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'}',
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@ -899,85 +888,89 @@ var startPicker = function() {
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highlightElements([], true);
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var initPicker = function(details) {
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var i18nMap = {
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'#µBlock > div': '@@bidi_dir',
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'#create': 'create',
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'#pick': 'pick',
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'#quit': 'quit',
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'ul > li#netFilters > span:nth-of-type(1)': 'netFilters',
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'ul > li#cosmeticFilters > span:nth-of-type(1)': 'cosmeticFilters',
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'ul > li#cosmeticFilters > span:nth-of-type(2)': 'cosmeticFiltersHint'
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};
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if (details.i18n['@@bidi_dir']) {
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divDialog.style.direction = details.i18n['@@bidi_dir'];
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delete i18nMap['#µBlock > div'];
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}
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for ( var k in i18nMap ) {
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if ( i18nMap.hasOwnProperty(k) === false ) {
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continue;
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}
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divDialog.querySelector(k).firstChild.nodeValue = details.i18n[i18nMap[k]];
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}
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// Auto-select a specific target, if any, and if possible
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var elem;
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// Try using mouse position
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if ( details.clientX !== -1 ) {
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elem = elementFromPoint(details.clientX, details.clientY);
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if ( elem !== null ) {
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filtersFromElement(elem);
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showDialog();
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return;
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}
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}
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// No mouse position available, use suggested target
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var target = details.target || '';
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var pos = target.indexOf('\t');
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if ( pos === -1 ) {
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return;
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}
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var srcAttrMap = {
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'a': 'href',
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'img': 'src',
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'iframe': 'src',
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'video': 'src',
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'audio': 'src'
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};
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var tagName = target.slice(0, pos);
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var url = target.slice(pos + 1);
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var attr = srcAttrMap[tagName];
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if ( attr === undefined ) {
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return;
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}
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var elems = document.querySelectorAll(tagName + '[' + attr + ']');
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var i = elems.length;
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var src;
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while ( i-- ) {
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elem = elems[i];
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src = elem[attr];
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if ( typeof src !== 'string' || src === '' ) {
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continue;
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}
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if ( src !== url ) {
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continue;
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}
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filtersFromElement(elem);
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showDialog({ modifier: true });
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return;
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}
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var i18nMap = {
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'#µBlock > div': '@@bidi_dir',
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'#create': 'create',
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'#pick': 'pick',
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'#quit': 'quit',
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'ul > li#netFilters > span:nth-of-type(1)': 'netFilters',
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'ul > li#cosmeticFilters > span:nth-of-type(1)': 'cosmeticFilters',
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'ul > li#cosmeticFilters > span:nth-of-type(2)': 'cosmeticFiltersHint'
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};
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localMessager.send({ what: 'elementPickerArguments' }, initPicker);
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if (details.i18n['@@bidi_dir']) {
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divDialog.style.direction = details.i18n['@@bidi_dir'];
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delete i18nMap['#µBlock > div'];
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}
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for ( var k in i18nMap ) {
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if ( i18nMap.hasOwnProperty(k) === false ) {
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continue;
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}
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divDialog.querySelector(k).firstChild.nodeValue = details.i18n[i18nMap[k]];
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}
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// First we test if pointer-events are hadnled in Node.elementFromPoint().
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// If the browser ignores pointer-events in Node.elementFromPoint(),
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// then use the display property instead (e.g., for older Safari).
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var elem = elementFromPoint(0, 0);
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if ( elem === svgRoot ) {
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elementFromPointCSSProperty = 'display';
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}
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// Auto-select a specific target, if any, and if possible
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// Try using mouse position
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if ( details.clientX !== -1 ) {
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elem = elementFromPoint(details.clientX, details.clientY);
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if ( elem !== null ) {
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filtersFromElement(elem);
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showDialog();
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return;
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}
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}
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// No mouse position available, use suggested target
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var target = details.target || '';
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var pos = target.indexOf('\t');
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if ( pos === -1 ) {
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return;
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}
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var srcAttrMap = {
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'a': 'href',
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'img': 'src',
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'iframe': 'src',
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'video': 'src',
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'audio': 'src'
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};
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var tagName = target.slice(0, pos);
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var url = target.slice(pos + 1);
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var attr = srcAttrMap[tagName];
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if ( attr === undefined ) {
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return;
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}
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var elems = document.querySelectorAll(tagName + '[' + attr + ']');
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var i = elems.length;
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var src;
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while ( i-- ) {
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elem = elems[i];
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src = elem[attr];
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if ( typeof src !== 'string' || src === '' ) {
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continue;
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}
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if ( src !== url ) {
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continue;
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}
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filtersFromElement(elem);
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showDialog({ modifier: true });
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return;
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}
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};
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/******************************************************************************/
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startPicker();
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localMessager.send({ what: 'elementPickerArguments' }, startPicker);
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// This triggers the hiding of the popover in Safari
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window.focus();
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@ -38,7 +38,7 @@ var messagingConnector = function(response) {
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// Safari bug
|
||||
// Deleting the response.requestId below (only in some cases, probably
|
||||
// when frames are present on the page) will remove it from all the
|
||||
// following messages too, however with the following line it won't.
|
||||
// future messages too, however with the following line it won't.
|
||||
vAPI.safari && console.log;
|
||||
|
||||
delete vAPI.messaging.listeners[response.requestId];
|
||||
|
||||
Loading…
Reference in New Issue
Block a user