this fixes #45 + revised color-blind mode + support shutdown of content script

platform/chromium/manifest.json

@@ -1,7 +1,7 @@
 {
     "manifest_version": 2,
-    "name": "µMatrix",
-    "short_name": "µMatrix",
+    "name": "uMatrix",
+    "short_name": "uMatrix",
     "version": "0.8.1.4",
     "description": "__MSG_extShortDesc__",
     "icons": {
@@ -12,7 +12,7 @@
         "default_icon": {
             "19": "img/browsericons/icon19-19.png"
         },
-        "default_title": "µMatrix",
+        "default_title": "uMatrix",
         "default_popup": "popup.html"
     },
     "author": "Raymond Hill",

src/_locales/en/messages.json

@@ -299,6 +299,10 @@
         "message": "Opacity",
         "description": "English: Opacity"
     },
+    "settingsCollapseBlocked" : {
+        "message": "Collapse placeholder of blocked elements",
+        "description": "English: Collapse placeholder of blocked elements"
+    },
 
 
     "privacyPageTitle" : {

src/css/popup.css

@@ -462,22 +462,22 @@ body.powerOff .matrix .g4Meta.g4Collapsed ~ .matRow.ro {
 /* Cell coloring for color blind-friendly (hopefully) */
 body.colorblind .t81 {
     color: white;
-    background-color: #000;
+    background-color: rgb(0, 19, 110);
     }
 body.colorblind .t82 {
-    border-color: #aaa;
+    border-color: rgb(255, 194, 57);
     color: black;
-    background-color: #fff;
+    background-color: rgb(255, 194, 57);
     }
 body.colorblind .t1 {
-    border-color: #333;
-    color: white;
-    background-color: #666;
+    border-color: rgba(0, 19, 110, 0.3);
+    color: black;
+    background-color: rgba(0, 19, 110, 0.2);
     }
 body.colorblind .t2 {
-    border-color: #aaa;
+    border-color: rgba(255, 194, 57, 0.3);
     color: black;
-    background-color: #ccc;
+    background-color: rgba(255, 194, 57, 0.2);
     }
 body.colorblind .matCell.p81 {
     background-image: url('../img/permanent-black-small-cb.png');
@@ -533,18 +533,15 @@ body.powerOff #whitelist, body.powerOff #blacklist {
     background-color: #080;
     opacity: 0.25;
     }
-body.colorblind .rw .matCell.t1 #whitelist:hover {
-    background-color: #fff;
+body.colorblind .rw .matCell.t1 #whitelist:hover,
+body.colorblind .rw .matCell.t2 #whitelist:hover {
+    background-color: rgb(255, 194, 57);
     opacity: 0.6;
     }
 .rw .matCell.t2 #whitelist:hover {
     background-color: #080;
     opacity: 0.25;
     }
-body.colorblind .rw .matCell.t2 #whitelist:hover {
-    background-color: #fff;
-    opacity: 0.6;
-    }
 .matCell.t81 #whitelist:hover {
     background-color: transparent;
     }
@@ -555,18 +552,15 @@ body.colorblind .rw .matCell.t2 #whitelist:hover {
     background-color: #c00;
     opacity: 0.25;
     }
-body.colorblind .rw .matCell.t1 #blacklist:hover {
-    background-color: #000;
+body.colorblind .rw .matCell.t1 #blacklist:hover,
+body.colorblind .rw .matCell.t2 #blacklist:hover {
+    background-color: rgb(0, 19, 110);
     opacity: 0.4;
     }
 .rw .matCell.t2 #blacklist:hover {
     background-color: #c00;
     opacity: 0.25;
     }
-body.colorblind .rw .matCell.t2 #blacklist:hover {
-    background-color: #000;
-    opacity: 0.4;
-    }
 .matCell.t81 #blacklist:hover {
     background-color: transparent;
     }

src/js/background.js

@@ -53,6 +53,7 @@ return {
         autoUpdate: false,
         clearBrowserCache: true,
         clearBrowserCacheAfter: 60,
+        collapseBlocked: false,
         colorBlindFriendly: false,
         deleteCookies: false,
         deleteUnusedSessionCookies: false,

src/js/contentscript-end.js

@@ -1,7 +1,7 @@
 /*******************************************************************************
 
     µMatrix - a Chromium browser extension to black/white list requests.
-    Copyright (C) 2014  Raymond Hill
+    Copyright (C) 2014-2105 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
@@ -63,88 +63,243 @@ vAPI.contentscriptEndInjected = true;
 
 var localMessager = vAPI.messaging.channel('contentscript-end.js');
 
+vAPI.shutdown.add(function() {
+    localMessager.close();
+});
+
 /******************************************************************************/
 /******************************************************************************/
 
-// This is to be executed only once: putting this code in its own closure
-// means the code will be flushed from memory once executed.
+// Unrendered noscript (because CSP) workaround
+
+// Executed once.
 
 (function() {
+    var checkScriptBlacklistedHandler = function(response) {
+        if ( !response.scriptBlacklisted ) {
+            return;
+        }
+        var scripts = document.querySelectorAll('noscript');
+        var i = scripts.length;
+        var realNoscript, fakeNoscript;
+        while ( i-- ) {
+            realNoscript = scripts[i];
+            fakeNoscript = document.createElement('div');
+            fakeNoscript.innerHTML = '<!-- uMatrix NOSCRIPT tag replacement: see <https://github.com/gorhill/httpswitchboard/issues/177> -->\n' + realNoscript.textContent;
+            realNoscript.parentNode.replaceChild(fakeNoscript, realNoscript);
+        }
+    };
 
-/******************************************************************************/
-
-/*------------[ Unrendered Noscript (because CSP) Workaround ]----------------*/
-
-var checkScriptBlacklistedHandler = function(response) {
-    if ( !response.scriptBlacklisted ) {
-        return;
-    }
-    var scripts = document.querySelectorAll('noscript');
-    var i = scripts.length;
-    var realNoscript, fakeNoscript;
-    while ( i-- ) {
-        realNoscript = scripts[i];
-        fakeNoscript = document.createElement('div');
-        fakeNoscript.innerHTML = '<!-- uMatrix NOSCRIPT tag replacement: see <https://github.com/gorhill/httpswitchboard/issues/177> -->\n' + realNoscript.textContent;
-        realNoscript.parentNode.replaceChild(fakeNoscript, realNoscript);
-    }
-};
-
-localMessager.send({
-        what: 'checkScriptBlacklisted',
-        url: window.location.href
-}, checkScriptBlacklistedHandler);
-
-/******************************************************************************/
-
-var localStorageHandler = function(mustRemove) {
-    if ( mustRemove ) {
-        window.localStorage.clear();
-        window.sessionStorage.clear();
-        // console.debug('HTTP Switchboard > found and removed non-empty localStorage');
-    }
-};
-
-// Check with extension whether local storage must be emptied
-// rhill 2014-03-28: we need an exception handler in case 3rd-party access
-// to site data is disabled.
-// https://github.com/gorhill/httpswitchboard/issues/215
-try {
-    var hasLocalStorage = window.localStorage && window.localStorage.length;
-    var hasSessionStorage = window.sessionStorage && window.sessionStorage.length;
-    if ( hasLocalStorage || hasSessionStorage ) {
-        localMessager.send({
-                what: 'contentScriptHasLocalStorage',
-                url: window.location.href
-        }, localStorageHandler);
-    }
-
-    // TODO: indexedDB
-    if ( window.indexedDB && !!window.indexedDB.webkitGetDatabaseNames ) {
-        // var db = window.indexedDB.webkitGetDatabaseNames().onsuccess = function(sender) {
-        //    console.debug('webkitGetDatabaseNames(): result=%o', sender.target.result);
-        // };
-    }
-
-    // TODO: Web SQL
-    if ( window.openDatabase ) {
-        // Sad:
-        // "There is no way to enumerate or delete the databases available for an origin from this API."
-        // Ref.: http://www.w3.org/TR/webdatabase/#databases
-    }
-}
-catch (e) {
-}
-
-/******************************************************************************/
-
+    localMessager.send({
+            what: 'checkScriptBlacklisted',
+            url: window.location.href
+    }, checkScriptBlacklistedHandler);
 })();
 
 /******************************************************************************/
 /******************************************************************************/
 
-(function() {
+// Executed only once.
 
+(function() {
+    var localStorageHandler = function(mustRemove) {
+        if ( mustRemove ) {
+            window.localStorage.clear();
+            window.sessionStorage.clear();
+            // console.debug('HTTP Switchboard > found and removed non-empty localStorage');
+        }
+    };
+
+    // Check with extension whether local storage must be emptied
+    // rhill 2014-03-28: we need an exception handler in case 3rd-party access
+    // to site data is disabled.
+    // https://github.com/gorhill/httpswitchboard/issues/215
+    try {
+        var hasLocalStorage = window.localStorage && window.localStorage.length;
+        var hasSessionStorage = window.sessionStorage && window.sessionStorage.length;
+        if ( hasLocalStorage || hasSessionStorage ) {
+            localMessager.send({
+                    what: 'contentScriptHasLocalStorage',
+                    url: window.location.href
+            }, localStorageHandler);
+        }
+
+        // TODO: indexedDB
+        if ( window.indexedDB && !!window.indexedDB.webkitGetDatabaseNames ) {
+            // var db = window.indexedDB.webkitGetDatabaseNames().onsuccess = function(sender) {
+            //    console.debug('webkitGetDatabaseNames(): result=%o', sender.target.result);
+            // };
+        }
+
+        // TODO: Web SQL
+        if ( window.openDatabase ) {
+            // Sad:
+            // "There is no way to enumerate or delete the databases available for an origin from this API."
+            // Ref.: http://www.w3.org/TR/webdatabase/#databases
+        }
+    }
+    catch (e) {
+    }
+})();
+
+/******************************************************************************/
+/******************************************************************************/
+
+// https://github.com/gorhill/uMatrix/issues/45
+
+var collapser = (function() {
+    var timer = null;
+    var requestId = 1;
+    var newRequests = [];
+    var pendingRequests = {};
+    var pendingRequestCount = 0;
+    var srcProps = {
+        'iframe': 'src',
+        'img': 'src'
+    };
+
+    var PendingRequest = function(target, tagName, attr) {
+        this.id = requestId++;
+        this.target = target;
+        pendingRequests[this.id] = this;
+        pendingRequestCount += 1;
+    };
+
+    // Because a while ago I have observed constructors are faster than
+    // literal object instanciations.
+    var BouncingRequest = function(id, tagName, url) {
+        this.id = id;
+        this.tagName = tagName;
+        this.url = url;
+        this.collapse = false;
+    };
+
+    var onProcessed = function(requests) {
+        if ( requests === null || Array.isArray(requests) === false ) {
+            return;
+        }
+
+        var i = requests.length;
+        var request, entry;
+        while ( i-- ) {
+            request = requests[i];
+            if ( pendingRequests.hasOwnProperty(request.id) === false ) {
+                continue;
+            }
+            entry = pendingRequests[request.id];
+            delete pendingRequests[request.id];
+            pendingRequestCount -= 1;
+
+            // https://github.com/chrisaljoudi/uBlock/issues/869
+            if ( !request.collapse ) {
+                continue;
+            }
+
+            // https://github.com/chrisaljoudi/uBlock/issues/399
+            // Never remove elements from the DOM, just hide them
+            entry.target.style.setProperty('display', 'none', 'important');
+        }
+        // Renew map: I believe that even if all properties are deleted, an
+        // object will still use more memory than a brand new one.
+        if ( pendingRequestCount === 0 ) {
+            pendingRequests = {};
+        }
+    };
+
+    var send = function() {
+        timer = null;
+        localMessager.send({
+            what: 'evaluateURLs',
+            requests: newRequests
+        }, onProcessed);
+        newRequests = [];
+    };
+
+    var process = function(delay) {
+        if ( newRequests.length === 0 ) {
+            return;
+        }
+        if ( delay === 0 ) {
+            clearTimeout(timer);
+            send();
+        } else if ( timer === null ) {
+            timer = setTimeout(send, delay || 50);
+        }
+    };
+
+    var addNode = function(target) {
+        var tagName = target.localName;
+        var prop = srcProps[tagName];
+        if ( prop === undefined ) {
+            return;
+        }
+
+        // https://github.com/chrisaljoudi/uBlock/issues/174
+        // Do not remove fragment from src URL
+        var src = target[prop];
+        if ( typeof src !== 'string' || src === '' ) {
+            return;
+        }
+        if ( src.lastIndexOf('http', 0) !== 0 ) {
+            return;
+        }
+        var req = new PendingRequest(target, tagName, prop);
+        newRequests.push(new BouncingRequest(req.id, tagName, src));
+    };
+
+    var addNodes = function(nodes) {
+        var node;
+        var i = nodes.length;
+        while ( i-- ) {
+            node = nodes[i];
+            if ( node.nodeType === 1 ) {
+                addNode(node);
+            }
+        }
+    };
+
+    var addBranches = function(branches) {
+        var root;
+        var i = branches.length;
+        while ( i-- ) {
+            root = branches[i];
+            if ( root.nodeType === 1 ) {
+                addNode(root);
+                // blocked images will be reported by onResourceFailed
+                addNodes(root.querySelectorAll('iframe'));
+            }
+        }
+    };
+
+    // Listener to collapse blocked resources.
+    // - Future requests not blocked yet
+    // - Elements dynamically added to the page
+    // - Elements which resource URL changes
+    var onResourceFailed = function(ev) {
+        addNode(ev.target);
+        process();
+    };
+    document.addEventListener('error', onResourceFailed, true);
+
+    vAPI.shutdown.add(function() {
+        if ( timer !== null ) {
+            clearTimeout(timer);
+            timer = null;
+        }
+        document.removeEventListener('error', onResourceFailed, true);
+        newRequests = [];
+        pendingRequests = {};
+        pendingRequestCount = 0;
+    });
+
+    return {
+        addNodes: addNodes,
+        addBranches: addBranches,
+        process: process
+    };
+})();
+
+/******************************************************************************/
 /******************************************************************************/
 
 var nodesAddedHandler = function(nodeList, summary) {
@@ -154,17 +309,17 @@ var nodesAddedHandler = function(nodeList, summary) {
         if ( node.nodeType !== 1 ) {
             continue;
         }
-        if ( typeof node.tagName !== 'string' ) {
+        if ( typeof node.localName !== 'string' ) {
             continue;
         }
 
-        switch ( node.tagName.toUpperCase() ) {
+        switch ( node.localName ) {
 
-        case 'SCRIPT':
+        case 'script':
             // https://github.com/gorhill/httpswitchboard/issues/252
             // Do not count µMatrix's own script tags, they are not required
             // to "unbreak" a web page
-            if ( node.id && node.id.indexOf('uMatrix-') === 0 ) {
+            if ( typeof node.id === 'string' && node.id.lastIndexOf('uMatrix-', 0) === 0 ) {
                 break;
             }
             text = node.textContent.trim();
@@ -179,14 +334,14 @@ var nodesAddedHandler = function(nodeList, summary) {
             }
             break;
 
-        case 'A':
-            if ( node.href.indexOf('javascript:') === 0 ) {
+        case 'a':
+            if ( node.href.lastIndexOf('javascript', 0) === 0 ) {
                 summary.scriptSources['{inline_script}'] = true;
                 summary.mustReport = true;
             }
             break;
 
-        case 'OBJECT':
+        case 'object':
             src = (node.data || '').trim();
             if ( src !== '' ) {
                 summary.pluginSources[src] = true;
@@ -194,7 +349,7 @@ var nodesAddedHandler = function(nodeList, summary) {
             }
             break;
 
-        case 'EMBED':
+        case 'embed':
             src = (node.src || '').trim();
             if ( src !== '' ) {
                 summary.pluginSources[src] = true;
@@ -221,13 +376,18 @@ var nodeListsAddedHandler = function(nodeLists) {
     };
     while ( i-- ) {
         nodesAddedHandler(nodeLists[i], summary);
+        collapser.addBranches(nodeLists[i]);
     }
     if ( summary.mustReport ) {
         localMessager.send(summary);
     }
+    collapser.process();
 };
 
 /******************************************************************************/
+/******************************************************************************/
+
+// Executed only once.
 
 (function() {
     var summary = {
@@ -241,62 +401,88 @@ var nodeListsAddedHandler = function(nodeLists) {
     // &
     // Looks for inline javascript also in at least one a[href] element.
     // https://github.com/gorhill/httpswitchboard/issues/131
-    nodesAddedHandler(document.querySelectorAll('script, a[href^="javascript:"], object, embed'), summary);
+    nodesAddedHandler(document.querySelectorAll('a[href^="javascript:"],embed,object,script'), summary);
 
     //console.debug('contentscript-end.js > firstObservationHandler(): found %d script tags in "%s"', Object.keys(summary.scriptSources).length, window.location.href);
 
     localMessager.send(summary);
+
+    collapser.addNodes(document.querySelectorAll('iframe,img'));
+    collapser.process();
 })();
 
+/******************************************************************************/
 /******************************************************************************/
 
 // Observe changes in the DOM
 
 // Added node lists will be cumulated here before being processed
-var addedNodeLists = [];
-var addedNodeListsTimer = null;
 
-var treeMutationObservedHandler = function() {
-    nodeListsAddedHandler(addedNodeLists);
-    addedNodeListsTimer = null;
-    addedNodeLists = [];
-};
+(function() {
+    var addedNodeLists = [];
+    var addedNodeListsTimer = null;
 
-// https://github.com/gorhill/uBlock/issues/205
-// Do not handle added node directly from within mutation observer.
-var treeMutationObservedHandlerAsync = function(mutations) {
-    var iMutation = mutations.length;
-    var nodeList;
-    while ( iMutation-- ) {
-        nodeList = mutations[iMutation].addedNodes;
-        if ( nodeList.length !== 0 ) {
-            addedNodeLists.push(nodeList);
+    var treeMutationObservedHandler = function() {
+        nodeListsAddedHandler(addedNodeLists);
+        addedNodeListsTimer = null;
+        addedNodeLists = [];
+    };
+
+    // https://github.com/gorhill/uBlock/issues/205
+    // Do not handle added node directly from within mutation observer.
+    var treeMutationObservedHandlerAsync = function(mutations) {
+        var iMutation = mutations.length;
+        var nodeList;
+        while ( iMutation-- ) {
+            nodeList = mutations[iMutation].addedNodes;
+            if ( nodeList.length !== 0 ) {
+                addedNodeLists.push(nodeList);
+            }
         }
-    }
-    // I arbitrarily chose 250 ms for now:
-    // I have to compromise between the overhead of processing too few 
-    // nodes too often and the delay of many nodes less often. There is nothing
-    // time critical here.
-    if ( addedNodeListsTimer === null ) {
-        addedNodeListsTimer = setTimeout(treeMutationObservedHandler, 250);
-    }
-};
+        // I arbitrarily chose 250 ms for now:
+        // I have to compromise between the overhead of processing too few 
+        // nodes too often and the delay of many nodes less often. There is nothing
+        // time critical here.
+        if ( addedNodeListsTimer === null ) {
+            addedNodeListsTimer = setTimeout(treeMutationObservedHandler, 250);
+        }
+    };
+
+    // This fixes http://acid3.acidtests.org/
+    if ( document.body ) {
+        return;
+    }
 
-// This fixes http://acid3.acidtests.org/
-if ( document.body ) {
     // https://github.com/gorhill/httpswitchboard/issues/176
     var treeObserver = new MutationObserver(treeMutationObservedHandlerAsync);
     treeObserver.observe(document.body, {
         childList: true,
         subtree: true
     });
-}
-
-/******************************************************************************/
 
+    vAPI.shutdown.add(function() {
+        if ( addedNodeListsTimer !== null ) {
+            clearTimeout(addedNodeListsTimer);
+            addedNodeListsTimer = null;
+        }
+        if ( treeObserver !== null ) {
+            treeObserver.disconnect();
+            treeObserver = null;
+        }
+        addedNodeLists = [];
+    });
 })();
 
 /******************************************************************************/
 /******************************************************************************/
 
+localMessager.send({ what: 'shutdown?' }, function(response) {
+    if ( response === true ) {
+        vAPI.shutdown.exec();
+    }
+});
+
+/******************************************************************************/
+/******************************************************************************/
+
 })();

src/js/messaging.js

@@ -446,6 +446,45 @@ var contentScriptLocalStorageHandler = function(tabId, pageURL) {
 
 /******************************************************************************/
 
+// Evaluate many URLs against the matrix.
+
+var evaluateURLs = function(tabId, requests) {
+    if ( µm.userSettings.collapseBlocked === false ) {
+        return requests;
+    }
+
+    // Create evaluation context
+    var tabContext = µm.tabContextManager.lookup(tabId);
+    if ( tabContext === null ) {
+        return requests;
+    }
+    var rootHostname = tabContext.rootHostname;
+
+    //console.debug('messaging.js/contentscript-end.js: processing %d requests', requests.length);
+
+    var µmuri = µm.URI;
+    var typeMap = tagNameToRequestTypeMap;
+    var request;
+    var i = requests.length;
+    while ( i-- ) {
+        request = requests[i];
+        request.collapse = µm.mustBlock(
+            rootHostname,
+            µmuri.hostnameFromURI(request.url),
+            typeMap[request.tagName]
+        );
+    }
+
+    return requests;
+};
+
+var tagNameToRequestTypeMap = {
+    'iframe': 'sub_frame',
+       'img': 'image'
+};
+
+/******************************************************************************/
+
 var onMessage = function(request, sender, callback) {
     // Async
     switch ( request.what ) {
@@ -453,20 +492,12 @@ var onMessage = function(request, sender, callback) {
         break;
     }
 
-    var tabId = sender.tab.id;
+    var tabId = sender && sender.tab ? sender.tab.id || 0 : 0;
 
     // Sync
     var response;
 
     switch ( request.what ) {
-    case 'contentScriptHasLocalStorage':
-        response = contentScriptLocalStorageHandler(tabId, request.url);
-        break;
-
-    case 'contentScriptSummary':
-        contentScriptSummaryHandler(tabId, request);
-        break;
-
     case 'checkScriptBlacklisted':
         response = {
             scriptBlacklisted: µm.mustBlock(
@@ -477,12 +508,31 @@ var onMessage = function(request, sender, callback) {
         };
         break;
 
+    case 'contentScriptHasLocalStorage':
+        response = contentScriptLocalStorageHandler(tabId, request.url);
+        break;
+
+    case 'contentScriptSummary':
+        contentScriptSummaryHandler(tabId, request);
+        break;
+
+    case 'evaluateURLs':
+        response = evaluateURLs(tabId, request.requests);
+        break;
+
     case 'getUserAgentReplaceStr':
         response = µm.tMatrix.evaluateSwitchZ('ua-spoof', request.hostname) ?
             µm.userAgentReplaceStr : 
             undefined;
         break;
 
+    case 'shutdown?':
+        var tabContext = µm.tabContextManager.lookup(tabId);
+        if ( tabContext !== null ) {
+            response = µm.tMatrix.evaluateSwitchZ('matrix-off', tabContext.rootHostname);
+        }
+        break;
+
     default:
         return vAPI.messaging.UNHANDLED;
     }

src/settings.html

@@ -57,12 +57,16 @@ ul > li {
 <h2 data-i18n="settingsMatrixConvenienceHeader"></h2>
 <ul>
     <li>
+        <input id="collapseBlocked" type="checkbox" data-range="bool">
+        <label data-i18n="settingsCollapseBlocked" for="collapseBlocked"></label>
+    <!-- <li>
         <span data-i18n="settingsMatrixAutoReloadPrompt"></span> <select id="smart-auto-reload">
             <option value="none" data-i18n="settingsMatrixAutoReloadNone">
             <option value="current" data-i18n="settingsMatrixAutoReloadCurrent">
             <option value="all" data-i18n="settingsMatrixAutoReloadAll">
             </select> <button class="whatisthis"></button>
         <div class="whatisthis-expandable para" data-i18n="settingsMatrixAutoReloadInfo"></div>
+    -->
 </ul>