Add warning type into TopDirs and TopFiles index

* The index was a directory or file path.
  This change adds additional entries that have
  warning type prefix in the index.
* In the "Directories/Files with at least 1% warnings"
  section, the list will include number of warnings for
  (1) "all warnings in a directory/file"
  (2) "warnings of a type in a directory/file"
  (3) "warnings of a type in all directories/files"
  Examples:
    4273 (8.7%) frameworks/av/...
    4130 (8.4%) packages/...
    2427 (5.0%) [google-explicit-constructor] */...
    1628 (3.3%) [cert-err34-c] */...
    1099 (2.2%) [google-runtime-int] bionic/tests/math_data/...
     608 (1.2%) [cert-err34-c] external/...

Bug: 231245501
Test: warn.py --url=http://cs/android --separator='?l=' build.log > warnings.html
Test: warn.py --gencsv build.log > warnings.csv
Change-Id: I13bb54c846ad514334f78c5a71e994a131a92963

tools/warn/html_writer.py

@@ -662,15 +662,26 @@ function computeTopDirsFiles() {
   var warningsOfFiles = {};
   var warningsOfDirs = {};
   var subDirs = {};
-  function addOneWarning(map, key) {
+  function addOneWarning(map, key, type, unique) {
-    map[key] = 1 + ((key in map) ? map[key] : 0);
+    function increaseCounter(idx) {
+      map[idx] = 1 + ((idx in map) ? map[idx] : 0);
+    }
+    increaseCounter(key)
+    if (type != "") {
+      increaseCounter(type + " " + key)
+      if (unique) {
+        increaseCounter(type + " *")
+      }
+    }
   }
   for (var i = 0; i < numWarnings; i++) {
-    var file = WarningMessages[i].replace(/:.*/, "");
+    var message = WarningMessages[i]
-    addOneWarning(warningsOfFiles, file);
+    var file = message.replace(/:.*/, "");
+    var warningType = message.endsWith("]") ? message.replace(/.*\[/, "[") : "";
+    addOneWarning(warningsOfFiles, file, warningType, true);
     var dirs = file.split("/");
     var dir = dirs[0];
-    addOneWarning(warningsOfDirs, dir);
+    addOneWarning(warningsOfDirs, dir, warningType, true);
     for (var d = 1; d < dirs.length - 1; d++) {
       var subDir = dir + "/" + dirs[d];
       if (!(dir in subDirs)) {
@@ -678,7 +689,7 @@ function computeTopDirsFiles() {
       }
       subDirs[dir][subDir] = 1;
       dir = subDir;
-      addOneWarning(warningsOfDirs, dir);
+      addOneWarning(warningsOfDirs, dir, warningType, false);
     }
   }
   var minDirWarnings = numWarnings*(LimitPercentWarnings/100);
@@ -725,27 +736,33 @@ function genTopDirsFilesTables() {
         document.getElementById(divName));
     table.draw(view, {allowHtml: true, alternatingRowStyle: true});
   }
-  addTable("Directory", "top_dirs_table", TopDirs, "selectDir");
+  addTable("[Warning Type] Directory", "top_dirs_table", TopDirs, "selectDir");
-  addTable("File", "top_files_table", TopFiles, "selectFile");
+  addTable("[Warning Type] File", "top_files_table", TopFiles, "selectFile");
 }
 function selectDirFile(idx, rows, dirFile) {
   if (rows.length <= idx) {
     return;
   }
   var name = rows[idx][2];
+  var type = "";
+  if (name.startsWith("[")) {
+    type = " " + name.replace(/ .*/, "");
+    name = name.replace(/.* /, "");
+  }
   var spanName = "selected_" + dirFile + "_name";
-  document.getElementById(spanName).innerHTML = name;
+  document.getElementById(spanName).innerHTML = name + type;
   var divName = "selected_" + dirFile + "_warnings";
   var numWarnings = rows[idx][1].v;
   var prefix = name.replace(/\\.\\.\\.$/, "");
   var data = new google.visualization.DataTable();
-  data.addColumn('string', numWarnings + ' warnings in ' + name);
+  data.addColumn('string', numWarnings + type + ' warnings in ' + name);
   var getWarningMessage = (FlagPlatform == "chrome")
         ? ((x) => addURLToLine(WarningMessages[Warnings[x][2]],
                                WarningLinks[Warnings[x][3]]))
         : ((x) => addURL(WarningMessages[Warnings[x][2]]));
   for (var i = 0; i < Warnings.length; i++) {
-    if (WarningMessages[Warnings[i][2]].startsWith(prefix)) {
+    if ((prefix.startsWith("*") || WarningMessages[Warnings[i][2]].startsWith(prefix)) &&
+        (type == "" || WarningMessages[Warnings[i][2]].endsWith(type))) {
       data.addRow([getWarningMessage(i)]);
     }
   }
@@ -827,14 +844,14 @@ def dump_html(flags, output_stream, warning_messages, warning_links,
   def section2():
     dump_dir_file_section(
         writer, 'directory', 'top_dirs_table',
-        'Directories with at least ' +
+        'Directories/Warnings with at least ' +
-        str(LIMIT_PERCENT_WARNINGS) + '% warnings')
+        str(LIMIT_PERCENT_WARNINGS) + '% of all cases')
   def section3():
     dump_dir_file_section(
         writer, 'file', 'top_files_table',
-        'Files with at least ' +
+        'Files/Warnings with at least ' +
-        str(LIMIT_PERCENT_WARNINGS) + '% or ' +
+        str(LIMIT_PERCENT_WARNINGS) + '% of all or ' +
-        str(LIMIT_WARNINGS_PER_FILE) + ' warnings')
+        str(LIMIT_WARNINGS_PER_FILE) + ' cases')
   def section4():
     writer('<script>')
     emit_js_data(writer, flags, warning_messages, warning_links,