continued refactoring work: revert, revert all, persist are back

src/js/httpsb.js

@@ -135,44 +135,6 @@
 
 /******************************************************************************/
 
-// Apply a set of rules
-
-µMatrix.applyRulesetPermanently = function(ruleset) {
-    var changed = false;
-    var aa, i, o;
-    if ( aa = ruleset.rulesToAdd ) {
-        i = aa.length;
-        while ( i-- ) {
-            o = aa[i];
-            changed = this.pMatrix.setRule(o.k, o.v) || changed;
-        }
-    }
-    if ( aa = ruleset.rulesToRemove ) {
-        i = aa.length;
-        while ( i-- ) {
-            changed = this.pMatrix.setRule(aa[i]) || changed;
-        }
-    }
-    if ( aa = ruleset.switchesToAdd ) {
-        i = aa.length;
-        while ( i-- ) {
-            o = aa[i];
-            changed = this.pMatrix.setSwitch(o.k, o.v) || changed;
-        }
-    }
-    if ( aa = ruleset.switchesToRemove ) {
-        i = aa.length;
-        while ( i-- ) {
-            changed = this.pMatrix.setSwitch(aa[i]) || changed;
-        }
-    }
-    if ( changed ) {
-        this.saveMatrix();
-    }
-};
-
-/******************************************************************************/
-
 // TODO: Should type be transposed by the caller or in place here? Not an
 // issue at this point but to keep in mind as this function is called
 // more and more from different places.
@@ -214,23 +176,12 @@
 
 /******************************************************************************/
 
-µMatrix.getTemporaryColor = function(srcHostname, type, desHostname) {
-    // console.debug('HTTP Switchboard > getTemporaryColor(%s, %s, %s) = %s', src, type, hostname, evaluate(src, type, hostname));
-    return this.tMatrix.evaluateCellZXYColor(srcHostname, desHostname, type);
-};
-
-µMatrix.getPermanentColor = function(srcHostname, type, desHostname) {
-    return this.pMatrix.evaluateCellZXYColor(srcHostname, desHostname, type);
-};
-
-/******************************************************************************/
-
 µMatrix.getTemporaryMtxFiltering = function(srcHostname) {
-    return this.tMatrix.evaluateSwitch(srcHostname);
+    return this.tMatrix.evaluateSwitchZ(srcHostname);
 };
 
 µMatrix.getPermanentMtxFiltering = function(srcHostname) {
-    return this.pMatrix.evaluateSwitch(srcHostname);
+    return this.pMatrix.evaluateSwitchZ(srcHostname);
 };
 
 µMatrix.toggleTemporaryMtxFiltering = function(srcHostname, state) {

src/js/matrix.js

@@ -70,6 +70,26 @@ var typeBitOffsets = {
 
 /******************************************************************************/
 
+var columnHeaders = (function() {
+    var out = {};
+    var i = 0;
+    for ( var type in typeBitOffsets ) {
+        if ( typeBitOffsets.hasOwnProperty(type) === false ) {
+            continue;
+        }
+        out[type] = i++;
+    }
+    return out;
+})();
+
+/******************************************************************************/
+
+Matrix.getColumnHeaders = function() {
+    return columnHeaders;
+};
+
+/******************************************************************************/
+
 Matrix.prototype.reset = function() {
     this.switchedOn = {};
     this.rules = {};
@@ -99,25 +119,6 @@ Matrix.prototype.assign = function(other) {
 
 /******************************************************************************/
 
-// If value is undefined, the rule is removed
-
-Matrix.prototype.setRule = function(rule, value) {
-    if ( value !== undefined ) {
-        if ( this.rules.hasOwnProperty(rule) === false || this.rules[rule] !== value ) {
-            this.rules[rule] = value;
-            return true;
-        }
-    } else {
-        if ( this.rules.hasOwnProperty(rule) ) {
-            delete this.rules[rule];
-            return true;
-        }
-    }
-    return false;
-};
-
-/******************************************************************************/
-
 // If value is undefined, the switch is removed
 
 Matrix.prototype.setSwitch = function(srcHostname, state) {
@@ -137,14 +138,14 @@ Matrix.prototype.setSwitch = function(srcHostname, state) {
 
 /******************************************************************************/
 
-Matrix.prototype.setCell = function(srcHostname, desHostname, type, v) {
+Matrix.prototype.setCell = function(srcHostname, desHostname, type, state) {
     var bitOffset = typeBitOffsets[type];
     var k = srcHostname + ' ' + desHostname;
     var oldBitmap = this.rules[k];
     if ( oldBitmap === undefined ) {
         oldBitmap = 0;
     }
-    var newBitmap = oldBitmap & ~(3 << bitOffset) | (v << bitOffset);
+    var newBitmap = oldBitmap & ~(3 << bitOffset) | (state << bitOffset);
     if ( newBitmap === oldBitmap ) {
         return false;
     }
@@ -218,7 +219,7 @@ Matrix.prototype.evaluateCell = function(srcHostname, desHostname, type) {
 /******************************************************************************/
 
 Matrix.prototype.evaluateCellZ = function(srcHostname, desHostname, type) {
-    if ( this.evaluateSwitch(srcHostname) !== true ) {
+    if ( this.evaluateSwitchZ(srcHostname) !== true ) {
         return Matrix.Transparent;
     }
     var bitOffset = typeBitOffsets[type];
@@ -286,40 +287,39 @@ Matrix.prototype.evaluateCellZXY = function(srcHostname, desHostname, type) {
 
 /******************************************************************************/
 
-Matrix.prototype.evaluateRowZ = function(srcHostname, desHostname) {
+Matrix.prototype.evaluateRow = function(srcHostname, desHostname) {
     var out = [];
     for ( var type in typeBitOffsets ) {
         if ( typeBitOffsets.hasOwnProperty(type) === false ) {
             continue;
         }
-        out.push(this.evaluateCellZ(srcHostname, desHostname, type));
+        out.push(this.evaluateCell(srcHostname, desHostname, type));
     }
     return out.join('');
 };
 
 /******************************************************************************/
 
-Matrix.prototype.evaluateRowZXY = function(srcHostname, desHostname) {
+Matrix.prototype.evaluateRowZ = function(srcHostname, desHostname) {
     var out = [];
     for ( var type in typeBitOffsets ) {
         if ( typeBitOffsets.hasOwnProperty(type) === false ) {
             continue;
         }
-        out.push(this.evaluateCellZXY(srcHostname, desHostname, type));
+        out.push(this.evaluateCellZ(srcHostname, desHostname, type));
     }
-    return out;
+    return out.join('');
 };
 
 /******************************************************************************/
 
-Matrix.prototype.getColumnHeaders = function() {
+Matrix.prototype.evaluateRowZXY = function(srcHostname, desHostname) {
-    var out = {};
+    var out = [];
-    var i = 0;
     for ( var type in typeBitOffsets ) {
         if ( typeBitOffsets.hasOwnProperty(type) === false ) {
             continue;
         }
-        out[type] = i++;
+        out.push(this.evaluateCellZXY(srcHostname, desHostname, type));
     }
     return out;
 };
@@ -368,28 +368,9 @@ Matrix.prototype.extractZRules = function(srcHostname, desHostname, out) {
 
 /******************************************************************************/
 
-Matrix.prototype.evaluateCellZXYColor = function(srcHostname, desHostname, type) {
-    var v = this.evaluateCellZXY(srcHostname, desHostname, type);
-    if ( v === Matrix.RedIndirect ) {
-        return 'ri';
-    }
-    if ( v === Matrix.GreenIndirect ) {
-        return 'gi';
-    }
-    if ( v === Matrix.RedDirect ) {
-        return 'rd';
-    }
-    if ( v === Matrix.GreenDirect ) {
-        return 'gd';
-    }
-    return 'xx';
-};
-
-/******************************************************************************/
-
 Matrix.prototype.toggleSwitch = function(srcHostname, newState) {
     delete this.switchedOn[srcHostname];
-    var oldState = this.evaluateSwitch(srcHostname);
+    var oldState = this.evaluateSwitchZ(srcHostname);
     if ( newState === oldState ) {
         return false;
     }
@@ -400,37 +381,23 @@ Matrix.prototype.toggleSwitch = function(srcHostname, newState) {
 /******************************************************************************/
 
 Matrix.prototype.evaluateSwitch = function(srcHostname) {
-    var b;
+    var b = this.switchedOn[srcHostname];
-    var s = srcHostname;
+    if ( b !== undefined ) {
-    var pos;
+        return b;
-    for (;;) {
-        b = this.switchedOn[s];
-        if ( b !== undefined ) {
-            return b;
-        }
-        pos = s.indexOf('.');
-        if ( pos !== -1 ) {
-            s = s.slice(pos + 1);
-            continue;
-        }
-        if ( s !== '*' ) {
-            s = '*';
-            continue;
-        }
-        break;
     }
     return true;
 };
 
 /******************************************************************************/
 
-Matrix.prototype.extractSwitches = function(srcHostname, out) {
+Matrix.prototype.evaluateSwitchZ = function(srcHostname) {
+    var b;
     var s = srcHostname;
-    var v, pos;
+    var pos;
     for (;;) {
-        v = this.rules[s];
+        b = this.switchedOn[s];
-        if ( v !== undefined ) {
+        if ( b !== undefined ) {
-            out[s] = v;
+            return b;
         }
         pos = s.indexOf('.');
         if ( pos !== -1 ) {
@@ -443,6 +410,7 @@ Matrix.prototype.extractSwitches = function(srcHostname, out) {
         }
         break;
     }
+    return true;
 };
 
 /******************************************************************************/
@@ -478,6 +446,76 @@ Matrix.prototype.fromSelfie = function(selfie) {
 
 /******************************************************************************/
 
+Matrix.prototype.diff = function(other, srcHostname, desHostnames) {
+    var out = [];
+    var desHostname, type;
+    var i, pos, thisVal, otherVal;
+    for (;;) {
+        thisVal = this.evaluateSwitch(srcHostname);
+        otherVal = other.evaluateSwitch(srcHostname);
+        if ( thisVal !== otherVal ) {
+            out.push({
+                'what': 'switch',
+                'src': srcHostname
+            });
+        }
+        i = desHostnames.length;
+        while ( i-- ) {
+            desHostname = desHostnames[i];
+            for ( type in typeBitOffsets ) {
+                if ( typeBitOffsets.hasOwnProperty(type) === false ) {
+                    continue;
+                }
+                thisVal = this.evaluateCell(srcHostname, desHostname, type);
+                otherVal = other.evaluateCell(srcHostname, desHostname, type);
+                if ( thisVal === otherVal ) {
+                    continue;
+                }
+                out.push({
+                    'what': 'rule',
+                    'src': srcHostname,
+                    'des': desHostname,
+                    'type': type
+                });
+            }
+        }
+        if ( srcHostname === '*' ) {
+            break;
+        }
+        pos = srcHostname.indexOf('.');
+        if ( pos !== -1 ) {
+            srcHostname = srcHostname.slice(pos + 1);
+        } else {
+            srcHostname = '*';
+        }
+    }
+    return out;
+};
+
+/******************************************************************************/
+
+Matrix.prototype.applyDiff = function(diff, from) {
+    var changed = false;
+    var i = diff.length;
+    var action, val;
+    while ( i-- ) {
+        action = diff[i];
+        if ( action.what === 'switch' ) {
+            val = from.evaluateSwitch(action.src);
+            changed = this.setSwitch(action.src, val) || changed;
+            continue;
+        }
+        if ( action.what === 'rule' ) {
+            val = from.evaluateCell(action.src, action.des, action.type);
+            changed = this.setCell(action.src, action.des, action.type, val) || changed;
+            continue;
+        }
+    }
+    return changed;
+};
+
+/******************************************************************************/
+
 return Matrix;
 
 /******************************************************************************/

src/js/messaging-handlers.js

@@ -43,16 +43,16 @@ var smartReload = function(tabs) {
 
 // Constructor is faster than object literal
 
-var HostnameSnapshot = function(srcHostname, desHostname, desDomain) {
+var RowSnapshot = function(srcHostname, desHostname, desDomain) {
     this.domain = desDomain;
     this.temporary = µm.tMatrix.evaluateRowZXY(srcHostname, desHostname);
     this.permanent = µm.pMatrix.evaluateRowZXY(srcHostname, desHostname);
-    this.counts = HostnameSnapshot.counts.slice();
+    this.counts = RowSnapshot.counts.slice();
-    this.totals = HostnameSnapshot.counts.slice();
+    this.totals = RowSnapshot.counts.slice();
 };
 
-HostnameSnapshot.counts = (function() {
+RowSnapshot.counts = (function() {
-    var i = Object.keys(µm.tMatrix.getColumnHeaders()).length;
+    var i = Object.keys(µm.Matrix.getColumnHeaders()).length;
     var aa = new Array(i);
     while ( i-- ) {
         aa[i] = 0;
@@ -62,19 +62,32 @@ HostnameSnapshot.counts = (function() {
 
 /******************************************************************************/
 
-var matrixSnapshot = function (tabId) {
+var matrixSnapshot = function(details) {
     var r = {
-        tabId: tabId,
+        tabId: details.tabId,
         url: '',
         hostname: '',
         domain: '',
+        scopeLevel: µm.userSettings.scopeLevel,
         scope: '*',
-        headers: µm.tMatrix.getColumnHeaders(),
+        headers: µm.Matrix.getColumnHeaders(),
+        tSwitch: false,
+        pSwitch: false,
         rows: {},
-        rowCount: 0
+        rowCount: 0,
+        diff: []
     };
-
+/*
-    var pageStore = µm.pageStatsFromTabId(tabId);
+    // Allow to scope on behind-the-scene virtual tab
+    if ( tab.url.indexOf('chrome-extension://' + chrome.runtime.id + '/') === 0 ) {
+        targetTabId = µm.behindTheSceneTabId;
+        targetPageURL = µm.behindTheSceneURL;
+    } else {
+        targetTabId = tab.id;
+        targetPageURL = µm.pageUrlFromTabId(targetTabId);
+    }
+*/
+    var pageStore = µm.pageStatsFromTabId(details.tabId);
     if ( !pageStore ) {
         return r;
     }
@@ -85,14 +98,17 @@ var matrixSnapshot = function (tabId) {
     r.hostname = pageStore.pageHostname;
     r.domain = pageStore.pageDomain;
 
-    if ( µm.userSettings.scopeLevel === 'site' ) {
+    if ( r.scopeLevel === 'site' ) {
         r.scope = r.hostname;
-    } else if ( µm.userSettings.scopeLevel === 'domain' ) {
+    } else if ( r.scopeLevel === 'domain' ) {
         r.scope = r.domain;
     }
 
+    r.tSwitch = µm.tMatrix.evaluateSwitchZ(r.scope);
+    r.pSwitch = µm.pMatrix.evaluateSwitchZ(r.scope);
+
     // This one always exist
-    r.rows['*'] = new HostnameSnapshot(r.hostname, '*', '*');
+    r.rows['*'] = new RowSnapshot(r.scope, '*', '*');
     r.rowCount += 1;
 
     var µmuri = µm.URI;
@@ -124,7 +140,7 @@ var matrixSnapshot = function (tabId) {
             if ( r.rows.hasOwnProperty(desHostname) !== false ) {
                 break;
             }
-            r.rows[desHostname] = new HostnameSnapshot(r.hostname, desHostname, reqDomain);
+            r.rows[desHostname] = new RowSnapshot(r.scope, desHostname, reqDomain);
             r.rowCount += 1;
             if ( desHostname === reqDomain ) {
                 break;
@@ -153,6 +169,8 @@ var matrixSnapshot = function (tabId) {
         row.totals[anyIndex] += 1;
     }
 
+    r.diff = µm.tMatrix.diff(µm.pMatrix, r.hostname, Object.keys(r.rows));
+
     return r;
 };
 
@@ -171,23 +189,37 @@ var onMessage = function(request, sender, callback) {
     switch ( request.what ) {
         case 'disconnected':
             // https://github.com/gorhill/httpswitchboard/issues/94
-            if ( µMatrix.userSettings.smartAutoReload ) {
+            if ( µm.userSettings.smartAutoReload ) {
                 chrome.tabs.query({ active: true }, smartReload);
             }
             break;
 
         case 'matrixSnapshot':
-            response = matrixSnapshot(request.tabId);
+            response = matrixSnapshot(request);
+            break;
+
+        case 'applyDiffToPermanentMatrix': // aka "persist"
+            if ( µm.pMatrix.applyDiff(request.diff, µm.tMatrix) ) {
+                µm.saveMatrix();
+            }
+            break;
+
+        case 'applyDiffToTemporaryMatrix': // aka "revert"
+            µm.tMatrix.applyDiff(request.diff, µm.pMatrix);
+            break;
+
+        case 'revertTemporaryMatrix':
+            µm.tMatrix.assign(µm.pMatrix);
             break;
 
         default:
-            return µMatrix.messaging.defaultHandler(request, sender, callback);
+            return µm.messaging.defaultHandler(request, sender, callback);
     }
 
     callback(response);
 };
 
-µMatrix.messaging.listen('popup.js', onMessage);
+µm.messaging.listen('popup.js', onMessage);
 
 })();
 

src/js/popup.js

@@ -30,16 +30,6 @@
 /******************************************************************************/
 /******************************************************************************/
 
-var µMatrix = chrome.extension.getBackgroundPage().µMatrix;
-var matrixSnapshot = {};
-var matrixStats = {};
-var targetTabId;
-var targetPageURL;
-var targetPageHostname;
-var targetPageDomain;
-var targetScope = '*';
-var matrixCellHotspots = null;
-
 // Must be consistent with definitions in matrix.js
 const Pale        = 0x00;
 const Dark        = 0x80;
@@ -54,6 +44,30 @@ const PaleGreen   = Pale | Green;
 const DarkGray    = Dark | Gray;
 const PaleGray    = Pale | Gray;
 
+var µMatrix = chrome.extension.getBackgroundPage().µMatrix;
+var matrixSnapshot = {};
+var groupsSnapshot = [];
+var allHostnamesSnapshot = 'do not leave this initial string empty';
+
+var targetTabId;
+var targetPageURL;
+var targetPageHostname;
+var targetPageDomain;
+var targetScope = '*';
+var matrixCellHotspots = null;
+
+var matrixHeaderPrettyNames = {
+    'all': '',
+    'cookie': '',
+    'css': '',
+    'image': '',
+    'plugin': '',
+    'script': '',
+    'xhr': '',
+    'frame': '',
+    'other': ''
+};
+
 /******************************************************************************/
 /******************************************************************************/
 
@@ -94,31 +108,6 @@ function setUserSetting(setting, value) {
 
 /******************************************************************************/
 
-var HTTPSBPopup = {
-    matrixDomains: {},
-    matrixHeaderTypes: ['*'],
-    matrixGroup3Collapsed: false,
-
-    groupsSnapshot: [],
-    domainListSnapshot: 'do not leave this initial string empty',
-
-    matrixHeaderPrettyNames: {
-        'all': '',
-        'cookie': '',
-        'css': '',
-        'image': '',
-        'plugin': '',
-        'script': '',
-        'xhr': '',
-        'frame': '',
-        'other': ''
-    },
-
-    dummy: 0
-};
-
-/******************************************************************************/
-
 function updateMatrixSnapshot() {
     var snapshotReady = function(response) {
         matrixSnapshot = response;
@@ -126,7 +115,7 @@ function updateMatrixSnapshot() {
         updateMatrixBehavior();
         updateMatrixButtons();
     };
-    messaging.ask({ what: 'matrixSnapshot', tabId: matrixSnapshot.tabId }, snapshotReady);
+    queryMatrixSnapshot(snapshotReady);
 }
 
 /******************************************************************************/
@@ -142,10 +131,10 @@ function getGroupStats() {
     // Try to not reshuffle groups around while popup is opened if
     // no new hostname added.
     var latestDomainListSnapshot = Object.keys(matrixSnapshot.rows).sort().join();
-    if ( latestDomainListSnapshot === HTTPSBPopup.domainListSnapshot ) {
+    if ( latestDomainListSnapshot === allHostnamesSnapshot ) {
-        return HTTPSBPopup.groupsSnapshot;
+        return groupsSnapshot;
     }
-    HTTPSBPopup.domainListSnapshot = latestDomainListSnapshot;
+    allHostnamesSnapshot = latestDomainListSnapshot;
 
     // First, group according to whether at least one node in the domain
     // hierarchy is white or blacklisted
@@ -216,7 +205,7 @@ function getGroupStats() {
         group[domain][hostname] = true;
     }
 
-    HTTPSBPopup.groupsSnapshot = groups;
+    groupsSnapshot = groups;
 
     return groups;
 }
@@ -389,71 +378,6 @@ function handleBlacklistFilter(button) {
 
 /******************************************************************************/
 
-function getTemporaryRuleset() {
-    var µm = µMatrix;
-    var temporaryRules = {};
-    var permanentRules = {};
-    var temporarySwitches = {};
-    var permanentSwitches = {};
-    var ruleset = {
-        rulesToAdd: [],
-        rulesToRemove: [],
-        switchesToAdd: [],
-        switchesToRemove: [],
-        count: 0
-    };
-    for ( var hostname in matrixStats ) {
-        if ( matrixStats.hasOwnProperty(hostname) === false ) {
-            continue;
-        }
-        µm.tMatrix.extractZRules(targetPageHostname, hostname, temporaryRules);
-        µm.pMatrix.extractZRules(targetPageHostname, hostname, permanentRules);
-    }
-    µm.tMatrix.extractSwitches(targetPageHostname, temporarySwitches);
-    µm.pMatrix.extractSwitches(targetPageHostname, permanentSwitches);
-
-    var k;
-    for ( k in temporaryRules ) {
-        if ( temporaryRules.hasOwnProperty(k) === false ) {
-            continue;
-        }
-        if ( temporaryRules[k] !== permanentRules[k] ) {
-            ruleset.rulesToAdd.push({ k: k, v: temporaryRules[k] });
-        }
-    }
-    for ( k in permanentRules ) {
-        if ( permanentRules.hasOwnProperty(k) === false ) {
-            continue;
-        }
-        if ( temporaryRules[k] === undefined ) {
-            ruleset.rulesToRemove.push(k);
-        }
-    }
-    for ( k in temporarySwitches ) {
-        if ( temporarySwitches.hasOwnProperty(k) === false ) {
-            continue;
-        }
-        if ( temporarySwitches[k] !== permanentSwitches[k] ) {
-            ruleset.switchesToAdd.push({ k: k, v: temporarySwitches[k] });
-        }
-    }
-    for ( k in permanentSwitches ) {
-        if ( permanentSwitches.hasOwnProperty(k) === false ) {
-            continue;
-        }
-        if ( temporarySwitches[k] === undefined ) {
-            ruleset.switchesToRemove.push(k);
-        }
-    }
-    ruleset.count = ruleset.rulesToAdd.length +
-                    ruleset.rulesToRemove.length +
-                    ruleset.switchesToAdd.length +
-                    ruleset.switchesToRemove.length;
-    return ruleset;
-}
-
-/******************************************************************************/
-
 var matrixRowPool = [];
 var matrixSectionPool = [];
 var matrixGroupPool = [];
@@ -685,6 +609,7 @@ function computeMatrixGroupMetaStats(group) {
             totals[i] += matrixSnapshot.rows[domains[j]].totals[i];
         }
     }
+    // TODO: column 0 is supposed to be count of blacklisted hostnames
     return totals;
 }
 
@@ -881,8 +806,7 @@ function makeMatrixGroup3(group) {
     if ( domains.length === 0 ) {
         return;
     }
-    var groupDiv = createMatrixGroup()
+    var groupDiv = createMatrixGroup().addClass('g3');
-        .addClass('g3');
     createMatrixSection()
         .addClass('g3Meta')
         .toggleClass('g3Collapsed', !!getUserSetting('popupHideBlacklisted'))
@@ -930,7 +854,7 @@ var makeMenu = function() {
 // Do all the stuff that needs to be done before building menu et al.
 
 function initMenuEnvironment() {
-    var prettyNames = HTTPSBPopup.matrixHeaderPrettyNames;
+    var prettyNames = matrixHeaderPrettyNames;
     var keys = Object.keys(prettyNames);
     var i = keys.length;
     var cell, key, text;
@@ -1013,7 +937,7 @@ function updateScopeCell() {
 
 function updateMtxbutton() {
     var µm = µMatrix;
-    var masterSwitch = µm.getTemporaryMtxFiltering(targetScope);
+    var masterSwitch = matrixSnapshot.tSwitch;
     var pageStats = getPageStats();
     var count = pageStats ? pageStats.requestStats.blocked.all : '';
     var button = uDom('#buttonMtxFiltering');
@@ -1032,23 +956,26 @@ function toggleMtxFiltering() {
 /******************************************************************************/
 
 function updatePersistButton() {
-    var ruleset = getTemporaryRuleset();
+    var diffCount = matrixSnapshot.diff.length;
     var button = uDom('#buttonPersist');
     button.contents()
           .filter(function(){return this.nodeType===3;})
           .first()
-          .text(ruleset.count > 0 ? '\uf13e' : '\uf023');
+          .text(diffCount > 0 ? '\uf13e' : '\uf023');
-    button.descendants('span.badge').text(ruleset.count > 0 ? ruleset.count : '');
+    button.descendants('span.badge').text(diffCount > 0 ? diffCount : '');
-    var disabled = ruleset.count === 0;
+    var disabled = diffCount === 0;
     button.toggleClass('disabled', disabled);
     uDom('#buttonRevertScope').toggleClass('disabled', disabled);
 }
 
-function persistScope() {
+/******************************************************************************/
-    var µm = µMatrix;
+
-    var ruleset = getTemporaryRuleset();
+function persistMatrix() {
-    µm.applyRulesetPermanently(ruleset);
+    var request = {
-    updateMatrixSnapshot();
+        what: 'applyDiffToPermanentMatrix',
+        diff: matrixSnapshot.diff
+    };
+    messaging.ask(request, updateMatrixSnapshot);
 }
 
 /******************************************************************************/
@@ -1056,11 +983,12 @@ function persistScope() {
 // rhill 2014-03-12: revert completely ALL changes related to the
 // current page, including scopes.
 
-function revertScope() {
+function revertMatrix() {
-    var µm = µMatrix;
+    var request = {
-    var ruleset = getTemporaryRuleset();
+        what: 'applyDiffToTemporaryMatrix',
-    µm.revertScopeRules(ruleset.tScopeKey);
+        diff: matrixSnapshot.diff
-    updateMatrixSnapshot();
+    };
+    messaging.ask(request, updateMatrixSnapshot);
 }
 
 /******************************************************************************/
@@ -1076,8 +1004,10 @@ function updateMatrixButtons() {
 /******************************************************************************/
 
 function revertAll() {
-    µMatrix.revertAllRules();
+    var request = {
-    updateMatrixSnapshot();
+        what: 'revertTemporaryMatrix'
+    };
+    messaging.ask(request, updateMatrixSnapshot);
 }
 
 /******************************************************************************/
@@ -1132,24 +1062,6 @@ function dropDownMenuHide() {
 // Because chrome.tabs.query() is async
 
 var onMatrixSnapshotReady = function(response) {
-/*
-    // TODO: can tabs be empty?
-    if ( !tabs.length ) {
-        return;
-    }
-
-    var µm = µMatrix;
-
-    // Important! Before calling makeMenu()
-    // Allow to scope on behind-the-scene virtual tab
-    if ( tab.url.indexOf('chrome-extension://' + chrome.runtime.id + '/') === 0 ) {
-        targetTabId = µm.behindTheSceneTabId;
-        targetPageURL = µm.behindTheSceneURL;
-    } else {
-        targetTabId = tab.id;
-        targetPageURL = µm.pageUrlFromTabId(targetTabId);
-    }
-*/
     matrixSnapshot = response;
 
     targetTabId = response.tabId;
@@ -1175,11 +1087,23 @@ var onMatrixSnapshotReady = function(response) {
 
 /******************************************************************************/
 
-var onTabsReceived = function(tabs) {
+var queryMatrixSnapshot = function(callback) {
-    if ( tabs.length === 0 ) {
+    var request = {
-        return;
+        what: 'matrixSnapshot',
+        tabId: targetTabId
+    };
+    var onTabsReceived = function(tabs) {
+        if ( tabs.length === 0 ) {
+            return;
+        }
+        request.tabId = targetTabId = tabs[0].id;
+        messaging.ask(request, callback);
+    };
+    if ( targetTabId === undefined ) {
+        chrome.tabs.query({ active: true, currentWindow: true }, onTabsReceived);
+    } else {
+        messaging.ask(request, callback);
     }
-    messaging.ask({ what: 'matrixSnapshot', tabId: tabs[0].id }, onMatrixSnapshotReady);
 };
 
 /******************************************************************************/
@@ -1187,7 +1111,7 @@ var onTabsReceived = function(tabs) {
 // Make menu only when popup html is fully loaded
 
 uDom.onLoad(function() {
-    chrome.tabs.query({ active: true, currentWindow: true }, onTabsReceived);
+    queryMatrixSnapshot(onMatrixSnapshotReady);
 
     // Below is UI stuff which is not key to make the menu, so this can
     // be done without having to wait for a tab to be bound to the menu.
@@ -1217,8 +1141,8 @@ uDom.onLoad(function() {
     uDom('#scopeKeyDomain').on('click', createDomainScope);
     uDom('#scopeKeySite').on('click', createSiteScope);
     uDom('#buttonMtxFiltering').on('click', toggleMtxFiltering);
-    uDom('#buttonPersist').on('click', persistScope);
+    uDom('#buttonPersist').on('click', persistMatrix);
-    uDom('#buttonRevertScope').on('click', revertScope);
+    uDom('#buttonRevertScope').on('click', revertMatrix);
 
     uDom('#buttonRevertAll').on('click', revertAll);
     uDom('#buttonReload').on('click', buttonReloadHandler);