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| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 /** | |
| 6 * @fileoverview Helper functions and objects for the JS debugger UI. | |
| 7 * @see debugger.html | |
| 8 */ | |
| 9 | |
| 10 /** | |
| 11 * Document load listener. | |
| 12 */ | |
| 13 function onLoad() { | |
| 14 var debuggerConsole = new DebuggerConsole(); | |
| 15 DebuggerIPC.init(debuggerConsole); | |
| 16 DebugShell.initDebugShell(debuggerConsole); | |
| 17 debuggerConsole.focusOnCommandLine(); | |
| 18 } | |
| 19 | |
| 20 /** | |
| 21 * @constructor | |
| 22 */ | |
| 23 function DebuggerConsole() | |
| 24 { | |
| 25 this._output = document.getElementById("output"); | |
| 26 | |
| 27 var input = document.getElementById("command-line-text"); | |
| 28 var self = this; | |
| 29 input.addEventListener( | |
| 30 'keydown', | |
| 31 function(e) { | |
| 32 return self._onInputKeyDown(e); | |
| 33 }, | |
| 34 true); | |
| 35 input.addEventListener( | |
| 36 'keypress', | |
| 37 function(e) { | |
| 38 return self._onInputKeyPress(e); | |
| 39 }, | |
| 40 true); | |
| 41 this._commandLineInput = input; | |
| 42 | |
| 43 // command object stores command-line history state. | |
| 44 this._command = { | |
| 45 history: [], | |
| 46 history_index: 0, | |
| 47 pending: null | |
| 48 }; | |
| 49 }; | |
| 50 | |
| 51 DebuggerConsole.prototype = { | |
| 52 /** | |
| 53 * Sets focus to command-line-text element. | |
| 54 */ | |
| 55 focusOnCommandLine: function() { | |
| 56 this._commandLineInput.focus(); | |
| 57 }, | |
| 58 | |
| 59 /** | |
| 60 * Called by chrome code when there's output to display. | |
| 61 * @param {string} txt | |
| 62 */ | |
| 63 appendText: function(txt) | |
| 64 { | |
| 65 this._output.appendChild(document.createTextNode(txt)); | |
| 66 this._output.appendChild(document.createElement('br')); | |
| 67 document.body.scrollTop = document.body.scrollHeight; | |
| 68 }, | |
| 69 | |
| 70 /** | |
| 71 * Called by chrome code to set the current state as to whether the debugger | |
| 72 * is stopped at a breakpoint or is running. | |
| 73 * @param {boolean} isBroken | |
| 74 */ | |
| 75 setDebuggerBreak: function(isBroken) | |
| 76 { | |
| 77 var out = this._output; | |
| 78 if (isBroken) { | |
| 79 out.style.color = "black"; | |
| 80 this.focusOnCommandLine(); | |
| 81 } else { | |
| 82 out.style.color = "gray"; | |
| 83 } | |
| 84 }, | |
| 85 | |
| 86 /** | |
| 87 * Execute a debugger command, add it to the command history and display it
in | |
| 88 * the output window. | |
| 89 * @param {string} str | |
| 90 */ | |
| 91 executeCommand: function(str) { | |
| 92 this.appendText("$ " + str); | |
| 93 // Sends message to DebuggerContents.HandleCommand. | |
| 94 if (DebugShell.singleton) { | |
| 95 DebugShell.singleton.command(str); | |
| 96 } else { | |
| 97 this.appendText("FAILED to send the command as DebugShell is null"); | |
| 98 } | |
| 99 | |
| 100 this._command.history.push(str); | |
| 101 this._command.history_index = this._command.history.length; | |
| 102 this._command.pending = null; | |
| 103 }, | |
| 104 | |
| 105 | |
| 106 /** | |
| 107 * Display the previous history item in the given text field. | |
| 108 * @param {HTMLInputElement} field | |
| 109 */ | |
| 110 selectPreviousCommand_: function(field) { | |
| 111 var command = this._command; | |
| 112 if (command.history_index > 0) { | |
| 113 // Remember the current field value as a pending command if we're at
the | |
| 114 // end (it's something the user typed in). | |
| 115 if (command.history_index == command.history.length) | |
| 116 command.pending = field.value; | |
| 117 command.history_index--; | |
| 118 field.value = command.history[command.history_index]; | |
| 119 field.select(); | |
| 120 } | |
| 121 }, | |
| 122 | |
| 123 /** | |
| 124 * Display the next history item in the given text field. | |
| 125 * @param {HTMLInputElement} field | |
| 126 */ | |
| 127 selectNextCommand_: function(field) { | |
| 128 var command = this._command; | |
| 129 if (command.history_index < command.history.length) { | |
| 130 command.history_index++; | |
| 131 if (command.history_index == command.history.length) { | |
| 132 field.value = command.pending || ""; | |
| 133 } else { | |
| 134 field.value = command.history[command.history_index]; | |
| 135 } | |
| 136 field.select(); | |
| 137 } | |
| 138 }, | |
| 139 | |
| 140 /** | |
| 141 * command-line-text's onkeydown handler. | |
| 142 * @param {KeyboardEvent} e | |
| 143 * @return {boolean} | |
| 144 */ | |
| 145 _onInputKeyDown: function (e) { | |
| 146 var field = e.target; | |
| 147 var key = e.keyCode; | |
| 148 if (key == 38) { // up arrow | |
| 149 this.selectPreviousCommand_(field); | |
| 150 return false; | |
| 151 } else if (key == 40) { // down arrow | |
| 152 this.selectNextCommand_(field); | |
| 153 return false; | |
| 154 } | |
| 155 return true; | |
| 156 }, | |
| 157 | |
| 158 /** | |
| 159 * command-line-text's onkeypress handler. | |
| 160 * @param {KeyboardEvent} e | |
| 161 * @return {boolean} | |
| 162 */ | |
| 163 _onInputKeyPress: function (e) { | |
| 164 var field = e.target; | |
| 165 var key = e.keyCode; | |
| 166 if (key == 13) { // enter | |
| 167 this.executeCommand(field.value); | |
| 168 field.value = ""; | |
| 169 return false; | |
| 170 } | |
| 171 return true; | |
| 172 } | |
| 173 }; | |
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Chromium Code Reviews
Issue 177049:
On Linux, move the passing of filedescriptors to a dedicated socketpair(). (Closed)
