code review

10 years ago · fb639870df
3 changed files with 36 additions and 17 deletions
--- a/src/js/contentscript-end.js
+++ b/src/js/contentscript-end.js
@ -207,9 +207,11 @@ var collapser = (function() {
                srcProps[tagName],
                placeholders[tagName].replace('{{url}}', request.url)
            );
+            if ( tagName !== 'iframe' ) {
                target.style.setProperty('border', placeholders.border, 'important');
                target.style.setProperty('background', placeholders.background, 'important');
            }
+        }

        // Renew map: I believe that even if all properties are deleted, an
        // object will still use more memory than a brand new one.
--- a/src/js/messaging.js
+++ b/src/js/messaging.js
@ -441,10 +441,16 @@ var contentScriptLocalStorageHandler = function(tabId, pageURL) {
 // Evaluate many URLs against the matrix.

 var evaluateURLs = function(tabId, requests) {
+    var collapse = µm.userSettings.collapseBlocked;
+    var response = {
+        collapse: collapse,
+        requests: requests
+    };
+
    // Create evaluation context
    var tabContext = µm.tabContextManager.lookup(tabId);
    if ( tabContext === null ) {
-        return requests;
+        return response;
    }
    var rootHostname = tabContext.rootHostname;

@ -463,14 +469,34 @@ var evaluateURLs = function(tabId, requests) {
        );
    }

-    return requests;
+    if ( collapse ) {
+        placeholders = null;
+        return response;
+    }
+
+    if ( placeholders === null ) {
+        var bg = vAPI.localStorage.getItem('placeholderBackground');
+        placeholders = {
+            background: bg,
+            border: vAPI.localStorage.getItem('placeholderBorder'),
+            iframe: vAPI.localStorage.getItem('placeholderDocument').replace('{{bg}}', encodeURIComponent(bg)),
+            img: vAPI.localStorage.getItem('placeholderImage')
        };
+    }
+    response.placeholders = placeholders;
+
+    return response;
+};
+
+/******************************************************************************/

 var tagNameToRequestTypeMap = {
    'iframe': 'sub_frame',
       'img': 'image'
 };

+var placeholders = null;
+
 /******************************************************************************/

 var onMessage = function(request, sender, callback) {
@ -505,18 +531,7 @@ var onMessage = function(request, sender, callback) {
        break;

    case 'evaluateURLs':
-        response = {
-            collapse: µm.userSettings.collapseBlocked,
-            requests: evaluateURLs(tabId, request.requests)
-        };
-        if ( !response.collapse ) {
-            response.placeholders = {
-                background: vAPI.localStorage.getItem('placeholderBackground'),
-                border: vAPI.localStorage.getItem('placeholderBorder'),
-                iframe: vAPI.localStorage.getItem('placeholderDocument'),
-                img: vAPI.localStorage.getItem('placeholderImage')
-            };
-        }
+        response = evaluateURLs(tabId, request.requests);
        break;

    case 'getUserAgentReplaceStr':
--- a/src/js/start.js
+++ b/src/js/start.js
@ -84,7 +84,9 @@ var defaultLocalUserSettings = {
    placeholderDocument: [
            'data:text/html,',
            encodeURIComponent('<html><head><style>'),
-            encodeURIComponent('body { color: gray; font: 12px sans-serif; margin: 0; padding: 2px; white-space: nowrap; }'),
+            encodeURIComponent('body { background: '),
+            '{{bg}}',
+            encodeURIComponent('; color: gray; font: 12px sans-serif; margin: 0; padding: 2px; white-space: nowrap; }'),
            encodeURIComponent('</style></head><body>'),
            '{{url}}',
            encodeURIComponent('</body></html>')