1 files changed, 52 insertions, 0 deletions
diff --git a/Source/WebInspectorUI/Tools/PrettyPrinting/FormatterDebug.js b/Source/WebInspectorUI/Tools/PrettyPrinting/FormatterDebug.js
new file mode 100644
index 000000000..4374e993c
--- /dev/null
+++ b/Source/WebInspectorUI/Tools/PrettyPrinting/FormatterDebug.js
@@ -0,0 +1,52 @@
+Formatter.prototype.debug = function(from, to)
+{
+    var debug = "";
+    var outerMode = this._codeMirror.getMode();
+    var content = this._codeMirror.getRange(from, to);
+    var state = CodeMirror.copyState(outerMode, this._codeMirror.getTokenAt(from).state);
+
+    function pad(str, x, doNotQuote)
+    {
+        var result = doNotQuote ? str : "'" + str + "'";
+        for (var toPad = x - result.length; toPad > 0; --toPad)
+            result += " ";
+        return result;
+    }
+
+    function debugToken(mode, token, state, stream, originalPosition, startOfNewLine)
+    {
+        // Token Type
+        debug += "Token: " + pad(String(token), 14, !token);
+
+        // Original Position
+        debug += "Position: " + pad(String(originalPosition), 10);
+
+        // Language Specific Info
+        if (state.lexical) {
+            debug += "Lexical: " + pad(String(state.lexical.type), 10); // JavaScript
+            debug += "Prev: " + pad(String(state.lexical.prev ? state.lexical.prev.type : state.lexical.prev), 10, !state.lexical.prev);
+        }
+        else if (state.stack)
+            debug += "Stack: " + pad(String(state.stack[state.stack.length-1]), 16); // CSS
+
+        // String
+        debug += "Current: '" + stream.current() + "'\n";
+    }
+
+    var lineOffset = 0;
+    var lines = content.split("\n");
+    for (var i = 0; i < lines.length; ++i) {
+        var line = lines[i];
+        var startOfNewLine = true;
+        var stream = new CodeMirror.StringStream(line);
+        while (!stream.eol()) {
+            var innerMode = CodeMirror.innerMode(outerMode, state);
+            var token = outerMode.token(stream, state);
+            debugToken(innerMode.mode, token, state, stream, lineOffset + stream.start, startOfNewLine);
+            stream.start = stream.pos;
+            startOfNewLine = false;
+        }
+    }
+
+    return debug;
+}