1 files changed, 124 insertions, 0 deletions
diff --git a/chrome/browser/debugger/resources/debugger.js b/chrome/browser/debugger/resources/debugger.js
new file mode 100644
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+++ b/chrome/browser/debugger/resources/debugger.js
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+/**
+ * @fileoverview Helper functions and objects for the JS debugger UI.
+ * @see debugger.html
+ */
+
+/**
+ * Called at the end of <body>.
+ */
+function loaded() {
+  focusOnCommandLine();
+};
+
+/**
+ * Sets focus to command-line-text element.
+ */
+function focusOnCommandLine() {
+  var input = document.getElementById('command-line-text');
+  input.focus();
+};
+
+/**
+ * Called by chrome code when there's output to display.
+ */
+function appendText(txt) {
+  var output = document.getElementById('output');
+  output.appendChild(document.createTextNode(txt));
+  output.appendChild(document.createElement('br'));
+  document.body.scrollTop = document.body.scrollHeight;
+};
+
+// command object stores command-line history state.
+var command = {
+  history: [],
+  history_index: 0,
+  pending: null
+};
+
+/**
+ * Execute a debugger command, add it to the command history and display it in
+ * the output window.
+ */
+function executeCommand(str) {
+  appendText("$ " + str);
+  // Sends field.value to DebuggerContents.HandleCommand.
+  chrome.send("command", [str]);
+  command.history.push(str);
+  command.history_index = command.history.length;
+  command.pending = null;
+};
+
+/**
+ * Display the previous history item in the given text field.
+ */
+function selectPreviousCommand(field) {
+  if (command.history_index > 0) {
+    // Remember the current field value as a pending command if we're at the
+    // end (it's something the user typed in).
+    if (command.history_index == command.history.length)
+      command.pending = field.value;
+    command.history_index--;
+    field.value = command.history[command.history_index];
+    field.select();
+  }
+};
+
+/**
+ * Display the next history item in the given text field.
+ */
+function selectNextCommand(field) {
+  if (command.history_index < command.history.length) {
+    command.history_index++;
+    if (command.history_index == command.history.length) {
+      field.value = command.pending || "";
+    } else {
+      field.value = command.history[command.history_index];
+    }
+    field.select();
+  }
+};
+
+
+/**
+ * command-line-text's onkeypress handler
+ */
+function keypress(e) {
+  var field = e.target;
+  var key = e.keyCode;
+  if (key == 13) { // enter
+    executeCommand(field.value);
+    field.value = "";
+    return false;
+  }
+  return true;
+};
+
+/**
+ * command-line-text's onkeydown handler
+ */
+function keydown(e) {
+  var field = e.target;
+  var key = e.keyCode;
+  if (key == 38) { // up arrow
+    selectPreviousCommand(field);
+    return false;
+  } else if (key == 40) { // down arrow
+    selectNextCommand(field);
+    return false;
+  }
+  return true;
+};
+
+/**
+ * Called by chrome code to set the current state as to whether the debugger
+ * is stopped at a breakpoint or is running.
+ */
+function setDebuggerBreak(is_broken) {
+  var out = document.getElementById('output');
+  if (is_broken) {
+    out.style.color = "black";
+    focusOnCommandLine();
+  } else {
+    out.style.color = "gray";
+  }
+};