Improve sizeviewer for Windows

tools/win/sizeviewer/main.js

+google.load("visualization", "1", {packages:["treemap"]});
+google.setOnLoadCallback(drawChart);
+function drawChart() {
+  var data = google.visualization.arrayToDataTable(g_raw_data);
+
+  tree = new google.visualization.TreeMap(
+      document.getElementById('chart_div'));
+
+  tree.draw(data, {
+    minColor: '#faa',
+    midColor: '#f77',
+    maxColor: '#f44',
+    headerHeight: 20,
+    fontColor: 'black',
+    showScale: true,
+    minColorValue: 0,
+    maxColorValue: g_maxval,
+    generateTooltip: tooltip
+  });
+
+  // Update from 'Loading'.
+  document.getElementById('title').innerText = g_dllname;
+
+  // Set favicon.
+  var doc_head = document.getElementsByTagName('head')[0];
+  var new_link = document.createElement('link');
+  new_link.rel = 'shortcut icon';
+  new_link.href = 'data:image/png;base64,'+g_favicon;
+  doc_head.appendChild(new_link);
+
+  var cur_line_sizes = null;
+  function nodeSelect() {
+    symlist.setValue('');
+    var selected = tree.getSelection();
+    if (selected.length > 0) {
+      var filename = data.getValue(selected[0].row, 0);
+      var size = data.getValue(selected[0].row, 2);
+      if (size >= 0) {
+        // Is a leaf.
+        cur_line_sizes = g_line_data[filename];
+        var body = g_file_contents[filename];
+        editor.setValue(body);
+        var maximum_size = 0;
+        for (var line in cur_line_sizes) {
+          maximum_size = Math.max(maximum_size, cur_line_sizes[line][0]);
+        }
+        for (var line in cur_line_sizes) {
+          var symbol_indices = cur_line_sizes[line][1];
+          var symbols = [];
+          for (var i = 0; i < symbol_indices.length; ++i) {
+            symbols.push(g_symbol_list[symbol_indices[i]]);
+          }
+          var size = cur_line_sizes[line][0];
+          // Zero based lines.
+          var line_num = parseInt(line, 10) - 1;
+          if (size >= maximum_size * 0.9)
+            editor.addLineClass(line_num, 'gutter', 'linebg-top10');
+          else if (size >= maximum_size * 0.75)
+            editor.addLineClass(line_num, 'gutter', 'linebg-top25');
+          else if (size >= maximum_size * 0.5)
+            editor.addLineClass(line_num, 'gutter', 'linebg-top50');
+          function addTag() {
+            var line_num = parseInt(line, 10);
+            var symbols_tooltip = symbols.join('\n');
+            var num_syms = symbols.length;
+            // markText wants 0-based lines.
+            var mark = editor.markText({line: line_num - 1, ch: 0},
+                            {line: line_num, ch: 0},
+                            { className: 'symbol-tag' });
+            CodeMirror.on(mark, 'beforeCursorEnter', function(e) {
+              symlist.setValue(num_syms +
+                                ' symbol(s) contributing to line ' +
+                                line_num + ':\n' +
+                                symbols_tooltip);
+            });
+          }
+          addTag();
+        }
+      }
+    }
+  }
+  google.visualization.events.addListener(tree, 'select', nodeSelect);
+
+  editor = CodeMirror.fromTextArea(
+    document.getElementById('source_view'), {
+      readOnly: "nocursor",
+      mode: { name: 'text/x-c++src' },
+      lineNumbers: true,
+      lineNumberFormatter: weightGetter
+    });
+  editor.setSize(850, 600);
+
+  symlist = CodeMirror.fromTextArea(
+    document.getElementById('symlist_view'), {
+      readOnly: "nocursor",
+      mode: { name: 'none' },
+      lineNumbers: false
+    });
+  symlist.setSize(850, 150);
+
+  function tooltip(row, size, value) {
+    return '<div style="background:#fd9;' +
+            ' padding:10px; border-style:solid"><b>' +
+            data.getValue(row, 0) + '</b><br>' +
+            data.getColumnLabel(2) +
+            ' (total value of this cell and its children): ' + size +
+            '<br>';
+  }
+
+  function weightGetter(line) {
+    if (cur_line_sizes && cur_line_sizes.hasOwnProperty('' + line)) {
+      return cur_line_sizes['' + line][0] + ' bytes ' + line;
+    }
+    return line;
+  }
+}