180af87a17
r=bz sr=bz Perhaps an explanation. String concatenation is a chance for garbage collection. If you have unbounded input, this can be pretty bad. When you start running low on memory, the garbage collector gets desperate and won't take shortcuts. Worst of all, the original code generates one string of garbage every iteration starting with the second or third. This code uses a=[] to construct an array and a[n] to set the upper array boundary, 0 being the lower, and there are n slots between a[0] and a[n]. join() will build a string with n copies of the join argument, where n is the number of slots between between cells. So for: a=[]; a[1]=''; there's 1 slot between [0] and [1]. The array's length is actually 2, but the joined length will be 1. While it is possible to use new Array(x), the behavior is different because the array has length x and there are x-1 spaces between cells. This leads to code which would be both much longer and harder to read. And definitely not particularly intuitive. The code used here otoh, while magical will hopefully require you to pause, think, and quickly understand what's going on. If not, you paused long enough for this bubble to appear and explain it to you :). git-svn-id: svn://10.0.0.236/trunk@207376 18797224-902f-48f8-a5cc-f745e15eee43
398 lines
14 KiB
XML
398 lines
14 KiB
XML
<?xml version="1.0"?>
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<!DOCTYPE window SYSTEM "chrome://global/locale/console.dtd">
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<bindings id="consoleBindings"
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xmlns="http://www.mozilla.org/xbl"
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xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
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xmlns:xbl="http://www.mozilla.org/xbl">
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<binding id="console-box" extends="xul:box">
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<content>
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<xul:stringbundle src="chrome://global/locale/console.properties" role="string-bundle"/>
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<xul:vbox class="console-box-internal">
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<xul:vbox class="console-rows" role="console-rows" xbl:inherits="dir=sortOrder"/>
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</xul:vbox>
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</content>
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<implementation>
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<field name="limit" readonly="true">
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250
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</field>
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<field name="_showChromeErrors">-1</field>
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<property name="showChromeErrors">
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<getter><![CDATA[
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if (this._showChromeErrors != -1)
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return this._showChromeErrors;
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var pref = Components.classes['@mozilla.org/preferences-service;1'].getService();
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pref = pref.QueryInterface(Components.interfaces.nsIPrefBranch);
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try {
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return this._showChromeErrors = pref.getBoolPref("javascript.options.showInConsole");
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}
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catch(ex) {
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return this._showChromeErrors = false;
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}
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]]></getter>
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</property>
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<property name="count" readonly="true">
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<getter>return this.mCount</getter>
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</property>
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<property name="mode">
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<getter>return this.mMode;</getter>
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<setter><![CDATA[
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this.mMode = val || "All";
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this.setAttribute("mode", this.mMode);
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return val;
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]]></setter>
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</property>
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<property name="sortOrder">
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<getter>return this.getAttribute("sortOrder");</getter>
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<setter>this.setAttribute("sortOrder", val); return val;</setter>
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</property>
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<field name="mSelectedItem">null</field>
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<property name="selectedItem">
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<getter>return this.mSelectedItem</getter>
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<setter><![CDATA[
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if (this.mSelectedItem)
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this.mSelectedItem.removeAttribute("selected");
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this.mSelectedItem = val;
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val.setAttribute("selected", "true");
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]]></setter>
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</property>
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<method name="init">
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<body><![CDATA[
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this.mCount = 0;
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this.mConsoleListener = {
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console: this,
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observe : function(aObject) { this.console.appendItem(aObject); }
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};
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this.mConsoleRowBox = document.getAnonymousElementByAttribute(this, "role", "console-rows");
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this.mStrBundle = document.getAnonymousElementByAttribute(this, "role", "string-bundle");
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try {
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var isupports = Components.classes['@mozilla.org/consoleservice;1'].getService();
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this.mCService = isupports.QueryInterface(Components.interfaces.nsIConsoleService);
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this.mCService.registerListener(this.mConsoleListener);
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} catch (ex) {
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appendItem(
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"Unable to display errors - couldn't get Console Service component. " +
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"(Missing @mozilla.org/consoleservice;1)");
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return;
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}
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this.mMode = this.getAttribute("mode") || "All";
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this.appendInitialItems();
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]]></body>
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</method>
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<method name="destroy">
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<body><![CDATA[
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this.mCService.unregisterListener(this.mConsoleListener);
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]]></body>
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</method>
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<method name="appendInitialItems">
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<body><![CDATA[
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var out = {}; // Throwaway references to support 'out' parameters.
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this.mCService.getMessageArray(out, {});
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var messages = out.value;
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// In case getMessageArray returns 0-length array as null
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if (!messages)
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messages = [];
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var limit = messages.length - this.limit;
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if (limit < 0) limit = 0;
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// Checks if console ever been cleared
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for (var i = messages.length - 1; i >= limit; --i)
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if (!messages[i].message)
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break;
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// Populate with messages after latest "clear"
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while (++i < messages.length)
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this.appendItem(messages[i]);
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]]></body>
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</method>
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<method name="appendItem">
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<parameter name="aObject"/>
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<body><![CDATA[
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try {
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// Try to QI it to a script error to get more info
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var scriptError = aObject.QueryInterface(Components.interfaces.nsIScriptError);
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// filter chrome urls
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if (!this.showChromeErrors && scriptError.sourceName.substr(0, 9) == "chrome://")
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return;
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this.appendError(scriptError);
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} catch (ex) {
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try {
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// Try to QI it to a console message
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var msg = aObject.QueryInterface(Components.interfaces.nsIConsoleMessage);
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if (msg.message)
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this.appendMessage(msg.message);
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else // observed a null/"clear" message
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this.clearConsole();
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} catch (ex2) {
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// Give up and append the object itself as a string
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this.appendMessage(aObject);
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}
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}
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]]></body>
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</method>
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<method name="appendError">
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<parameter name="aObject"/>
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<body><![CDATA[
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var row = this.createConsoleRow();
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var nsIScriptError = Components.interfaces.nsIScriptError;
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// Is this error actually just a non-fatal warning?
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var warning = aObject.flags & nsIScriptError.warningFlag != 0;
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var typetext = warning ? "typeWarning" : "typeError";
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row.setAttribute("typetext", this.mStrBundle.getString(typetext));
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row.setAttribute("type", warning ? "warning" : "error");
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row.setAttribute("msg", aObject.errorMessage);
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row.setAttribute("category", aObject.category);
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if (aObject.lineNumber || aObject.sourceName) {
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row.setAttribute("href", aObject.sourceName);
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row.setAttribute("line", aObject.lineNumber);
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} else {
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row.setAttribute("hideSource", "true");
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}
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if (aObject.sourceLine) {
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row.setAttribute("code", aObject.sourceLine.replace("\n", "", "g"));
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if (aObject.columnNumber) {
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row.setAttribute("col", aObject.columnNumber);
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row.setAttribute("errorDots", this.repeatChar(" ", aObject.columnNumber));
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row.setAttribute("errorCaret", " ");
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} else {
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row.setAttribute("hideCaret", "true");
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}
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} else {
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row.setAttribute("hideCode", "true");
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}
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this.appendConsoleRow(row);
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]]></body>
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</method>
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<method name="appendMessage">
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<parameter name="aMessage"/>
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<parameter name="aType"/>
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<body><![CDATA[
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var row = this.createConsoleRow();
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row.setAttribute("type", aType || "message");
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row.setAttribute("msg", aMessage);
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this.appendConsoleRow(row);
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]]></body>
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</method>
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<method name="clear">
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<body><![CDATA[
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// add a "clear" message (mainly for other listeners)
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this.mCService.logStringMessage(null);
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this.mCService.reset();
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]]></body>
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</method>
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<method name="copySelectedItem">
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<body><![CDATA[
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if (this.mSelectedItem) try {
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const clipURI = "@mozilla.org/widget/clipboardhelper;1";
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const clipI = Components.interfaces.nsIClipboardHelper;
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var clipboard = Components.classes[clipURI].getService(clipI);
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clipboard.copyString(this.mSelectedItem.toString());
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} catch (ex) {
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// Unable to copy anything, die quietly
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}
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]]></body>
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</method>
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<method name="createConsoleRow">
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<body><![CDATA[
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var row = document.createElement("box");
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row.setAttribute("class", "console-row");
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row._IsConsoleRow = true;
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row._ConsoleBox = this;
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return row;
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]]></body>
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</method>
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<method name="appendConsoleRow">
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<parameter name="aRow"/>
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<body><![CDATA[
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this.mConsoleRowBox.appendChild(aRow);
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if (++this.mCount > this.limit) this.deleteFirst();
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]]></body>
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</method>
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<method name="deleteFirst">
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<body><![CDATA[
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var node = this.mConsoleRowBox.firstChild;
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this.mConsoleRowBox.removeChild(node);
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--this.mCount;
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]]></body>
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</method>
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<method name="clearConsole">
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<body><![CDATA[
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if (this.mCount == 0) // already clear
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return;
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this.mCount = 0;
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var newRows = this.mConsoleRowBox.cloneNode(false);
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this.mConsoleRowBox.parentNode.replaceChild(newRows, this.mConsoleRowBox);
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this.mConsoleRowBox = newRows;
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]]></body>
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</method>
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<!-- UTILITY FUNCTIONS -->
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<method name="repeatChar">
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<parameter name="aChar"/>
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<parameter name="aCol"/>
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<body><![CDATA[
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var ary = [];
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ary[aCol] = '';
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return ary.join(aChar);
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]]></body>
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</method>
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<constructor> this.init(); </constructor>
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<destructor> this.destroy(); </destructor>
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</implementation>
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<handlers>
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<handler event="mousedown"><![CDATA[
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if (event.button == 0 || event.button == 2) {
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var target = event.originalTarget;
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while (target && !("_IsConsoleRow" in target))
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target = target.parentNode;
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if (target)
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this.selectedItem = target;
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}
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]]></handler>
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</handlers>
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</binding>
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<binding id="error" extends="xul:box">
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<content>
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<xul:box class="console-row-internal-box" flex="1">
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<xul:box class="console-row-icon" align="center" xbl:inherits="selected">
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<xul:image class="console-icon" xbl:inherits="src,type"/>
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</xul:box>
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<xul:vbox class="console-row-content" xbl:inherits="selected" flex="1">
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<xul:box class="console-row-msg" align="start">
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<xul:label class="label" xbl:inherits="value=typetext"/>
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<xul:description class="console-error-msg" xbl:inherits="xbl:text=msg" flex="1"/>
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</xul:box>
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<xul:box class="console-row-file" xbl:inherits="hidden=hideSource">
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<xul:label class="label" value="&errFile.label;"/>
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<xul:box class="console-error-source" xbl:inherits="href,line"/>
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<spacer flex="1"/>
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<xul:hbox class="lineNumberRow" xbl:inherits="line">
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<xul:label class="label" value="&errLine.label;"/>
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<xul:label class="label" xbl:inherits="value=line"/>
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</xul:hbox>
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</xul:box>
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<xul:vbox class="console-row-code" xbl:inherits="selected,hidden=hideCode">
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<xul:label class="monospace console-code" xbl:inherits="value=code" crop="end"/>
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<xul:box xbl:inherits="hidden=hideCaret">
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<xul:label class="monospace console-dots" xbl:inherits="value=errorDots"/>
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<xul:label class="monospace console-caret" xbl:inherits="value=errorCaret"/>
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<xul:spacer flex="1"/>
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</xul:box>
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</xul:vbox>
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</xul:vbox>
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</xul:box>
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</content>
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<implementation>
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<method name="toString">
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<body><![CDATA[
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var msg = this.getAttribute("typetext") + " " + this.getAttribute("msg");
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var strBundle = this._ConsoleBox.mStrBundle;
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if (this.hasAttribute("line") && this.hasAttribute("href")) {
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msg += "\n" + strBundle.getFormattedString("errFile",
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[this.getAttribute("href")]) + "\n";
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if (this.hasAttribute("col")) {
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msg += strBundle.getFormattedString("errLineCol",
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[this.getAttribute("line"), this.getAttribute("col")]);
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} else
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msg += strBundle.getFormattedString("errLine", [this.getAttribute("line")]);
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}
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if (this.hasAttribute("code"))
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msg += "\n" + strBundle.getString("errCode") + "\n" + this.getAttribute("code");
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return msg;
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]]></body>
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</method>
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</implementation>
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</binding>
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<binding id="message" extends="xul:box">
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<content>
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<xul:box class="console-internal-box" flex="1">
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<xul:box class="console-row-icon" align="center">
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<xul:image class="console-icon" xbl:inherits="src,type"/>
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</xul:box>
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<xul:vbox class="console-row-content" xbl:inherits="selected" flex="1">
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<xul:vbox class="console-row-msg" flex="1">
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<xul:description class="console-msg-text" xbl:inherits="xbl:text=msg"/>
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</xul:vbox>
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</xul:vbox>
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</xul:box>
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</content>
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<implementation>
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<method name="toString">
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<body><![CDATA[
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return this.getAttribute("msg");
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]]></body>
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</method>
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</implementation>
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</binding>
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<binding id="console-error-source" extends="xul:box">
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<content>
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<xul:label class="text-link" xbl:inherits="href,value=href" crop="right"/>
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</content>
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<handlers>
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<handler event="click" phase="capturing" button="0" preventdefault="true">
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<![CDATA[
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var url = this.getAttribute("href");
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var line = getAttribute("line");
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window.openDialog(
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"chrome://global/content/viewSource.xul", "_blank",
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"all,dialog=no", url, null, null, line);
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]]>
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</handler>
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</handlers>
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</binding>
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</bindings>
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