Ensure the bottom of dashboard panes is visible

Related issue:
- https://github.com/uBlockOrigin/uBlock-issues/issues/1304

On small displays, not being able to scroll down
could become a usability issue.

src/css/3p-filters.css

@@ -2,6 +2,9 @@
     0% { transform: rotate(0deg); }
     100% { transform: rotate(360deg); }
     }
+body {
+    margin-bottom: 6rem;
+    }
 #actions {
     background-color: var(--default-surface);
     padding: var(--default-gap-small) 0 var(--default-gap-xsmall) 0;

src/css/about.css

@@ -1,3 +1,6 @@
+body {
+    margin-bottom: 6rem;
+    }
 .entries {
     margin: 0.5em 0;
     margin-inline-start: 2em;

src/css/codemirror.css

@@ -12,6 +12,9 @@
     height: 100%;
     width: 100%;
     }
+.CodeMirror-lines {
+    padding-bottom: 6rem;
+    }
 .CodeMirror-gutters {
     background-color: var(--cm-gutter-surface);
     border-color: var(--cm-gutter-border);

src/css/settings.css

@@ -1,3 +1,6 @@
+body {
+    margin-bottom: 6rem;
+    }
 .synopsis {
     font-size: 90%;
     }

src/js/1p-filters.js

@@ -63,6 +63,17 @@ let cachedUserFilters = '';
 
 /******************************************************************************/
 
+const getEditorText = function() {
+    const text = cmEditor.getValue().replace(/\s+$/, '');
+    return text === '' ? text : text + '\n';
+};
+
+const setEditorText = function(text) {
+    cmEditor.setValue(text.replace(/\s+$/, '') + '\n\n');
+};
+
+/******************************************************************************/
+
 // This is to give a visual hint that the content of user blacklist has changed.
 
 const userFiltersChanged = function(changed) {
@@ -83,10 +94,7 @@ const renderUserFilters = async function() {
 
     let content = details.content.trim();
     cachedUserFilters = content;
-    if ( content.length !== 0 ) {
-        content += '\n';
-    }
-    cmEditor.setValue(content);
+    setEditorText(content);
 
     userFiltersChanged(false);
 };
@@ -117,13 +125,10 @@ const handleImportFilePicker = function() {
 
     const fileReaderOnLoadHandler = function() {
         let content = abpImporter(this.result);
-        content = uBlockDashboard.mergeNewLines(
-            cmEditor.getValue().trim(),
-            content
-        );
+        content = uBlockDashboard.mergeNewLines(getEditorText(), content);
         cmEditor.operation(( ) => {
             const cmPos = cmEditor.getCursor();
-            cmEditor.setValue(`${content}\n`);
+            setEditorText(content);
             cmEditor.setCursor(cmPos);
             cmEditor.focus();
         });
@@ -150,7 +155,7 @@ const startImportFilePicker = function() {
 /******************************************************************************/
 
 const exportUserFiltersToFile = function() {
-    const val = cmEditor.getValue().trim();
+    const val = getEditorText();
     if ( val === '' ) { return; }
     const filename = vAPI.i18n('1pExportFilename')
         .replace('{{datetime}}', uBlockDashboard.dateNowToSensibleString())
@@ -166,7 +171,7 @@ const exportUserFiltersToFile = function() {
 const applyChanges = async function() {
     const details = await vAPI.messaging.send('dashboard', {
         what: 'writeUserFilters',
-        content: cmEditor.getValue(),
+        content: getEditorText(),
     });
     if ( details instanceof Object === false || details.error ) { return; }
 
@@ -178,23 +183,19 @@ const applyChanges = async function() {
 };
 
 const revertChanges = function() {
-    let content = cachedUserFilters;
-    if ( content.length !== 0 ) {
-        content += '\n';
-    }
-    cmEditor.setValue(content);
+    setEditorText(cachedUserFilters);
 };
 
 /******************************************************************************/
 
 const getCloudData = function() {
-    return cmEditor.getValue();
+    return getEditorText();
 };
 
 const setCloudData = function(data, append) {
     if ( typeof data !== 'string' ) { return; }
     if ( append ) {
-        data = uBlockDashboard.mergeNewLines(cmEditor.getValue(), data);
+        data = uBlockDashboard.mergeNewLines(getEditorText(), data);
     }
     cmEditor.setValue(data);
 };
@@ -205,7 +206,7 @@ self.cloud.onPull = setCloudData;
 /******************************************************************************/
 
 self.hasUnsavedData = function() {
-    return cmEditor.getValue().trim() !== cachedUserFilters;
+    return getEditorText().trim() !== cachedUserFilters;
 };
 
 /******************************************************************************/

src/js/dyna-rules.js

@@ -39,7 +39,7 @@ const mergeView = new CodeMirror.MergeView(
         lineWrapping: false,
         origLeft: '',
         revertButtons: true,
-        value: ''
+        value: '',
     }
 );
 mergeView.editor().setOption('styleActiveLine', true);

src/js/whitelist.js

@@ -92,7 +92,7 @@ const cmEditor = new CodeMirror(
         autofocus: true,
         lineNumbers: true,
         lineWrapping: true,
-        styleActiveLine: true
+        styleActiveLine: true,
     }
 );
 
@@ -100,10 +100,21 @@ uBlockDashboard.patchCodeMirrorEditor(cmEditor);
 
 /******************************************************************************/
 
+const getEditorText = function() {
+    let text = cmEditor.getValue().replace(/\s+$/, '');
+    return text === '' ? text : text + '\n';
+};
+
+const setEditorText = function(text) {
+    cmEditor.setValue(text.replace(/\s+$/, '') + '\n');
+};
+
+/******************************************************************************/
+
 const whitelistChanged = function() {
     const whitelistElem = uDom.nodeFromId('whitelist');
     const bad = whitelistElem.querySelector('.cm-error') !== null;
-    const changedWhitelist = cmEditor.getValue().trim();
+    const changedWhitelist = getEditorText().trim();
     const changed = changedWhitelist !== cachedWhitelist;
     uDom.nodeFromId('whitelistApply').disabled = !changed || bad;
     uDom.nodeFromId('whitelistRevert').disabled = !changed;
@@ -144,12 +155,9 @@ const renderWhitelist = async function() {
         }
         return ad.localeCompare(bd);
     });
-    let whitelistStr = details.whitelist.join('\n').trim();
+    const whitelistStr = details.whitelist.join('\n').trim();
     cachedWhitelist = whitelistStr;
-    if ( whitelistStr !== '' ) {
-        whitelistStr += '\n';
-    }
-    cmEditor.setValue(whitelistStr);
+    setEditorText(whitelistStr);
     if ( first ) {
         cmEditor.clearHistory();
     }
@@ -164,11 +172,8 @@ const handleImportFilePicker = function() {
     const fr = new FileReader();
     fr.onload = ev => {
         if ( ev.type !== 'load' ) { return; }
-        cmEditor.setValue(
-            [
-                cmEditor.getValue().trim(),
-                fr.result.trim()
-            ].join('\n').trim()
+        setEditorText(
+            [ getEditorText().trim(), fr.result.trim() ].join('\n').trim()
         );
     };
     fr.readAsText(file);
@@ -188,7 +193,7 @@ const startImportFilePicker = function() {
 /******************************************************************************/
 
 const exportWhitelistToFile = function() {
-    const val = cmEditor.getValue().trim();
+    const val = getEditorText();
     if ( val === '' ) { return; }
     const filename =
         vAPI.i18n('whitelistExportFilename')
@@ -203,7 +208,7 @@ const exportWhitelistToFile = function() {
 /******************************************************************************/
 
 const applyChanges = async function() {
-    cachedWhitelist = cmEditor.getValue().trim();
+    cachedWhitelist = getEditorText().trim();
     await messaging.send('dashboard', {
         what: 'setWhitelist',
         whitelist: cachedWhitelist,
@@ -212,23 +217,21 @@ const applyChanges = async function() {
 };
 
 const revertChanges = function() {
-    let content = cachedWhitelist;
-    if ( content !== '' ) { content += '\n'; }
-    cmEditor.setValue(content);
+    setEditorText(cachedWhitelist);
 };
 
 /******************************************************************************/
 
 const getCloudData = function() {
-    return cmEditor.getValue();
+    return getEditorText();
 };
 
 const setCloudData = function(data, append) {
     if ( typeof data !== 'string' ) { return; }
     if ( append ) {
-        data = uBlockDashboard.mergeNewLines(cmEditor.getValue().trim(), data);
+        data = uBlockDashboard.mergeNewLines(getEditorText().trim(), data);
     }
-    cmEditor.setValue(data.trim() + '\n');
+    setEditorText(data.trim());
 };
 
 self.cloud.onPush = getCloudData;
@@ -237,7 +240,7 @@ self.cloud.onPull = setCloudData;
 /******************************************************************************/
 
 self.hasUnsavedData = function() {
-    return cmEditor.getValue().trim() !== cachedWhitelist;
+    return getEditorText().trim() !== cachedWhitelist;
 };
 
 /******************************************************************************/