Unified Diff: include.postload.js
Issue 5225119261655040:
Issue 1282 - Don't generate filters conflicting with existing exception rules (Closed)
Patch Set: Addressed comment
Created March 3, 2015, 2:59 p.m.
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| Index: include.postload.js |
| =================================================================== |
| --- a/include.postload.js |
| +++ b/include.postload.js |
| @@ -23,6 +23,7 @@ |
| var clickHideFiltersDialog = null; |
| var lastRightClickEvent = null; |
| var lastRightClickEventValid = false; |
| +var lastMouseOverEvent = null; |
| function highlightElement(element, shadowColor, backgroundColor) |
| { |
| @@ -198,24 +199,6 @@ |
| return getURLsFromAttributes(element); |
| } |
| -function isBlockable(element) |
| -{ |
| - if (element.id) |
| - return true; |
| - if (element.classList.length > 0) |
| - return true; |
| - if (getURLsFromElement(element).length > 0) |
| - return true; |
| - |
| - // We only generate filters based on the "style" attribute, |
| - // if this is the only way we can generate a filter, and |
| - // only if there are at least two CSS properties defined. |
| - if (/:.+:/.test(element.getAttribute("style"))) |
| - return true; |
| - |
| - return false; |
| -} |
| - |
| // Adds an overlay to an element, which is probably a Flash object |
| function addElementOverlay(elt) { |
| var zIndex = "auto"; |
| @@ -312,13 +295,17 @@ |
| // Add overlays for blockable elements that don't emit mouse events, |
| // so that they can still be selected. |
| - var elts = document.querySelectorAll('object,embed,iframe,frame'); |
| - for(var i=0; i<elts.length; i++) |
| - { |
| - var element = elts[i]; |
| - if (isBlockable(element)) |
| - addElementOverlay(element); |
| - } |
| + [].forEach.call( |
| + document.querySelectorAll('object,embed,iframe,frame'), |
| + function(element) |
| + { |
| + getFiltersForElement(element, function(filters) |
| + { |
| + if (filters.length > 0) |
| + addElementOverlay(element); |
| + }); |
| + } |
| + ); |
| clickHide_activated = true; |
| document.addEventListener("mousedown", clickHide_stopPropagation, true); |
| @@ -401,63 +388,94 @@ |
| clickHide_mouseClick(e); |
| } |
| -function getBlockableElementOrAncestor(element) |
| +function getBlockableElementOrAncestor(element, callback) |
| { |
| + // We assume that the user doesn't want to block the whole page. |
| + // So we never consider the <html> or <body> element. |
| while (element && element != document.documentElement |
| && element != document.body) |
| { |
| - if (element instanceof HTMLElement && element.localName != "area") |
| + // We can't handle non-HTML (like SVG) elements, as well as |
| + // <area> elements (see below). So fall back to the parent element. |
| + if (!(element instanceof HTMLElement) || element.localName == "area") |
| + element = element.parentElement; |
| + |
| + // If image maps are used mouse events occur for the <area> element. |
| + // But we have to block the image associated with the <map> element. |
| + else if (element.localName == "map") |
| { |
| - // Handle <area> and their <map> elements specially, |
| - // blocking the image they are associated with |
| - if (element.localName == "map") |
| + var images = document.querySelectorAll("img[usemap]"); |
| + var image = null; |
| + |
| + for (var i = 0; i < images.length; i++) |
| { |
| - var images = document.querySelectorAll("img[usemap]"); |
| - for (var i = 0; i < images.length; i++) |
| + var usemap = image.getAttribute("usemap"); |
| + var index = usemap.indexOf("#"); |
| + |
| + if (index != -1 && usemap.substr(index + 1) == element.name) |
| { |
| - var image = images[i]; |
| - var usemap = image.getAttribute("usemap"); |
| - var index = usemap.indexOf("#"); |
| - |
| - if (index != -1 && usemap.substr(index + 1) == element.name) |
| - return getBlockableElementOrAncestor(image); |
| + image = images[i]; |
| + break; |
| } |
| - |
| - return null; |
| } |
| - if (isBlockable(element)) |
| - return element; |
| + element = image; |
| } |
| - element = element.parentElement; |
| + // Finally, if none of the above is true, check whether we can generate |
| + // any filters for this element. Otherwise fall back to its parent element. |
| + else |
| + { |
| + getFiltersForElement(element, function(filters) |
| + { |
| + if (filters.length > 0) |
| + callback(element); |
| + else |
| + getBlockableElementOrAncestor(element.parentElement, callback); |
| + }); |
| + |
| + return; |
| + } |
| } |
| - return null; |
| + // We reached the document root without finding a blockable element. |
| + callback(null); |
| } |
| // Hovering over an element so highlight it |
| function clickHide_mouseOver(e) |
| { |
| - if (clickHide_activated == false) |
| - return; |
| + lastMouseOverEvent = e; |
| - var target = getBlockableElementOrAncestor(e.target); |
| + getBlockableElementOrAncestor(e.target, function(element) |
| + { |
| + if (e == lastMouseOverEvent) |
| + { |
| + lastMouseOverEvent = null; |
| - if (target) |
| - { |
| - currentElement = target; |
| + if (clickHide_activated) |
| + { |
| + if (currentElement) |
| + unhighlightElement(currentElement); |
| - highlightElement(target, "#d6d84b", "#f8fa47"); |
| - target.addEventListener("contextmenu", clickHide_elementClickHandler, true); |
| - } |
| + if (element) |
| + { |
| + highlightElement(element, "#d6d84b", "#f8fa47"); |
| + element.addEventListener("contextmenu", clickHide_elementClickHandler, true); |
| + } |
| + |
| + currentElement = element; |
| + } |
| + } |
| + }); |
| + |
| e.stopPropagation(); |
| } |
| // No longer hovering over this element so unhighlight it |
| function clickHide_mouseOut(e) |
| { |
| - if (!clickHide_activated || !currentElement) |
| + if (!clickHide_activated || currentElement != e.target) |
| return; |
| unhighlightElement(currentElement); |
| @@ -496,6 +514,7 @@ |
| style: element.getAttribute("style"), |
| classes: [].slice.call(element.classList), |
| urls: getURLsFromElement(element), |
| + mediatype: typeMap[element.localName], |
| baseURL: document.location.href |
| }, |
| function(response) |
| @@ -674,9 +693,12 @@ |
| case "clickhide-new-filter": |
| if(lastRightClickEvent) |
| { |
| - clickHide_activated = true; |
| - currentElement = getBlockableElementOrAncestor(lastRightClickEvent.target); |
| - clickHide_mouseClick(lastRightClickEvent); |
| + getBlockableElementOrAncestor(lastRightClickEvent.target, function(element) |
| + { |
| + clickHide_activated = true; |
| + currentElement = element; |
| + clickHide_mouseClick(lastRightClickEvent); |
| + }); |
| } |
| break; |
| case "clickhide-init": |
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