Implement word wrapping and panning in multiline Braille.

chrome/browser/resources/chromeos/chromevox/cvox2/background/panel.js

Index: chrome/browser/resources/chromeos/chromevox/cvox2/background/panel.js
diff --git a/chrome/browser/resources/chromeos/chromevox/cvox2/background/panel.js b/chrome/browser/resources/chromeos/chromevox/cvox2/background/panel.js
index 2469aebac6fbd661f7ee73068b92949c83fa5296..047109f3f9ca7f493b0d953d4ea68958f1516c5d 100644
--- a/chrome/browser/resources/chromeos/chromevox/cvox2/background/panel.js
+++ b/chrome/browser/resources/chromeos/chromevox/cvox2/background/panel.js
@@ -482,6 +482,13 @@ Panel.onUpdateBraille = function(data) {
       var companionID = cell.getAttribute('companionID');
       var companion = $(companionID);
       companion.className = 'highlighted-cell';
+
+      // If the cell has companionID2, then highlight it
+      var companionID2 = cell.getAttribute('companionID2');

[dmazzoni, 2016/11/14 21:37:37]

Rather than two attributes, how about a single attribute companionIDs with a
list of ids, space-separated? Use split() and join() to make it easy.

[ultimatedbz, 2016/11/15 18:04:02]

That's a great idea! I also heard that attributes should have 'data-' in front
of them to make them html compliant, so that's what I'll do.

+      if (companionID2 != undefined) {
+        var companion2 = $(companionID2);
+        companion2.className = 'highlighted-cell';
+      }
     }
   };
 
@@ -492,6 +499,13 @@ Panel.onUpdateBraille = function(data) {
       var companionID = cell.getAttribute('companionID');
       var companion = $(companionID);
       companion.className = 'unhighlighted-cell';
+
+      // If the cell has companionID2, then highlight it
+      var companionID2 = cell.getAttribute('companionID2');
+      if (companionID2 != undefined) {
+        var companion2 = $(companionID2);
+        companion2.className = 'unhighlighted-cell';
+      }
     }
   };
 
@@ -510,8 +524,10 @@ Panel.onUpdateBraille = function(data) {
 
   var row1, row2;
   rowCount = 0;
+  var cellCount = cols;
   for (var i = 0; i < groups.length; i++) {
-    if (i % cols == 0) {
+    if (cellCount == cols) {
+      cellCount = 0;
       // Check if we reached the limit on the number of rows we can have.
       if (rowCount == rows)
         break;
@@ -533,10 +549,36 @@ Panel.onUpdateBraille = function(data) {
     topCell.className = 'unhighlighted-cell';
 
     var bottomCell = row2.insertCell(-1);
-    bottomCell.innerHTML = groups[i][1];
     bottomCell.id = i + '-brailleCell';
     bottomCell.setAttribute('companionID', i + '-textCell');
     bottomCell.className = 'unhighlighted-cell';
+    if (cellCount + groups[i][1].length > cols) {
+      bottomCell.innerHTML = groups[i][1].substring(0, cols - cellCount);
+      if (rowCount == rows)
+        break;
+      rowCount++;
+      row1 = this.brailleTableElement_.insertRow(-1);
+      if (sideBySide) {
+        // Side by side.
+        row2 = this.brailleTableElement2_.insertRow(-1);
+      } else {
+        // Interleaved.
+        row2 = this.brailleTableElement_.insertRow(-1);
+      }
+      var bottomCell2 = row2.insertCell(-1);
+      bottomCell2.id = i + '-brailleCell2';
+      bottomCell2.setAttribute('companionID', i + '-textCell');
+      bottomCell2.setAttribute('companionID2', i + '-brailleCell');
+      bottomCell.setAttribute('companionID2', i + '-brailleCell2');
+      topCell.setAttribute('companionID2', i + '-brailleCell2');
+
+      bottomCell2.className = 'unhighlighted-cell';
+      bottomCell2.innerHTML = groups[i][1].substring(cols - cellCount);
+      cellCount = bottomCell2.innerHTML.length;
+    } else {
+      bottomCell.innerHTML = groups[i][1];
+      cellCount += groups[i][1].length;
+    }
   }
 };