RetroZilla/xpfe/browser/resources/content/viewsource.js

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2015-10-21 05:03:22 +02:00
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation. Portions created by Netscape are Copyright (C) Netscape Communications Corporation. All Rights Reserved.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Doron Rosenberg (doronr@naboonline.com)
* Neil Rashbrook (neil@parkwaycc.co.uk)
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
const pageLoaderIface = Components.interfaces.nsIWebPageDescriptor;
const nsISelectionPrivate = Components.interfaces.nsISelectionPrivate;
const nsISelectionController = Components.interfaces.nsISelectionController;
var gBrowser = null;
var gViewSourceBundle = null;
var gPrefs = null;
var gLastLineFound = '';
var gGoToLine = 0;
try {
var prefService = Components.classes["@mozilla.org/preferences-service;1"]
.getService(Components.interfaces.nsIPrefService);
gPrefs = prefService.getBranch(null);
} catch (ex) {
}
var gSelectionListener = {
timeout: 0,
notifySelectionChanged: function(doc, sel, reason)
{
// Coalesce notifications within 100ms intervals.
if (!this.timeout)
this.timeout = setTimeout(updateStatusBar, 100);
}
}
function onLoadViewSource()
{
viewSource(window.arguments[0]);
document.commandDispatcher.focusedWindow = content;
}
function getBrowser()
{
if (!gBrowser)
gBrowser = document.getElementById("content");
return gBrowser;
}
function getSelectionController()
{
return getBrowser().docShell
.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
.getInterface(Components.interfaces.nsISelectionDisplay)
.QueryInterface(nsISelectionController);
}
function getViewSourceBundle()
{
if (!gViewSourceBundle)
gViewSourceBundle = document.getElementById("viewSourceBundle");
return gViewSourceBundle;
}
function viewSource(url)
{
if (!url)
return false; // throw Components.results.NS_ERROR_FAILURE;
getBrowser().addEventListener("unload", onUnloadContent, true);
getBrowser().addEventListener("load", onLoadContent, true);
var loadFromURL = true;
//
// Parse the 'arguments' supplied with the dialog.
// arg[0] - URL string.
// arg[1] - Charset value in the form 'charset=xxx'.
// arg[2] - Page descriptor used to load content from the cache.
// arg[3] - Line number to go to.
//
if ("arguments" in window) {
var arg;
//
// Set the charset of the viewsource window...
//
if (window.arguments.length >= 2) {
arg = window.arguments[1];
try {
if (typeof(arg) == "string" && arg.indexOf('charset=') != -1) {
var arrayArgComponents = arg.split('=');
if (arrayArgComponents) {
//we should "inherit" the charset menu setting in a new window
getMarkupDocumentViewer().defaultCharacterSet = arrayArgComponents[1];
}
}
} catch (ex) {
// Ignore the failure and keep processing arguments...
}
}
//
// Get any specified line to jump to.
//
if (window.arguments.length >= 4) {
arg = window.arguments[3];
gGoToLine = parseInt(arg);
}
//
// Use the page descriptor to load the content from the cache (if
// available).
//
if (window.arguments.length >= 3) {
arg = window.arguments[2];
try {
if (typeof(arg) == "object" && arg != null) {
var PageLoader = getBrowser().webNavigation.QueryInterface(pageLoaderIface);
//
// Load the page using the page descriptor rather than the URL.
// This allows the content to be fetched from the cache (if
// possible) rather than the network...
//
PageLoader.loadPage(arg, pageLoaderIface.DISPLAY_AS_SOURCE);
// The content was successfully loaded from the page cookie.
loadFromURL = false;
}
} catch(ex) {
// Ignore the failure. The content will be loaded via the URL
// that was supplied in arg[0].
}
}
}
if (loadFromURL) {
//
// We need to set up session history to give us a page descriptor.
//
var webNavigation = getBrowser().webNavigation;
webNavigation.sessionHistory = Components.classes["@mozilla.org/browser/shistory;1"].createInstance();
//
// Currently, an exception is thrown if the URL load fails...
//
var loadFlags = Components.interfaces.nsIWebNavigation.LOAD_FLAGS_NONE;
var viewSrcUrl = "view-source:" + url;
webNavigation.loadURI(viewSrcUrl, loadFlags, null, null, null);
}
//check the view_source.wrap_long_lines pref and set the menuitem's checked attribute accordingly
if (gPrefs) {
try {
var wraplonglinesPrefValue = gPrefs.getBoolPref("view_source.wrap_long_lines");
if (wraplonglinesPrefValue)
document.getElementById('menu_wrapLongLines').setAttribute("checked", "true");
} catch (ex) {
}
try {
document.getElementById("menu_highlightSyntax").setAttribute("checked", gPrefs.getBoolPref("view_source.syntax_highlight"));
} catch (ex) {
}
} else {
document.getElementById("menu_highlightSyntax").setAttribute("hidden", "true");
}
window.content.focus();
return true;
}
function onLoadContent()
{
//
// If the view source was opened with a "go to line" argument.
//
if (gGoToLine > 0) {
goToLine(gGoToLine);
gGoToLine = 0;
}
document.getElementById('cmd_goToLine').removeAttribute('disabled');
// Register a listener so that we can show the caret position on the status bar.
window.content.getSelection()
.QueryInterface(nsISelectionPrivate)
.addSelectionListener(gSelectionListener);
}
function onUnloadContent()
{
//
// Disable "go to line" while reloading due to e.g. change of charset
// or toggling of syntax highlighting.
//
document.getElementById('cmd_goToLine').setAttribute('disabled', 'true');
}
function ViewSourceClose()
{
window.close();
}
function BrowserReload()
{
// Reload will always reload from cache which is probably not what's wanted
BrowserReloadSkipCache();
}
function BrowserReloadSkipCache()
{
const webNavigation = getBrowser().webNavigation;
webNavigation.reload(webNavigation.LOAD_FLAGS_BYPASS_PROXY | webNavigation.LOAD_FLAGS_BYPASS_CACHE);
}
// Strips the |view-source:| for editPage()
function ViewSourceEditPage()
{
editPage(window.content.location.href.substring(12));
}
// Strips the |view-source:| for saveURL()
function ViewSourceSavePage()
{
saveURL(window.content.location.href.substring(12), null, "SaveLinkTitle");
}
function ViewSourceGoToLine()
{
var promptService = Components.classes["@mozilla.org/embedcomp/prompt-service;1"]
.getService(Components.interfaces.nsIPromptService);
var viewSourceBundle = getViewSourceBundle();
var input = {value:gLastLineFound};
for (;;) {
var ok = promptService.prompt(
window,
viewSourceBundle.getString("goToLineTitle"),
viewSourceBundle.getString("goToLineText"),
input,
null,
{value:0});
if (!ok) return;
var line = parseInt(input.value);
if (!(line > 0)) {
promptService.alert(window,
viewSourceBundle.getString("invalidInputTitle"),
viewSourceBundle.getString("invalidInputText"));
continue;
}
var found = goToLine(line);
if (found) {
break;
}
promptService.alert(window,
viewSourceBundle.getString("outOfRangeTitle"),
viewSourceBundle.getString("outOfRangeText"));
}
}
function goToLine(line)
{
var viewsource = window.content.document.body;
//
// The source document is made up of a number of pre elements with
// id attributes in the format <pre id="line123">, meaning that
// the first line in the pre element is number 123.
// Do binary search to find the pre element containing the line.
//
var pre;
for (var lbound = 0, ubound = viewsource.childNodes.length; ; ) {
var middle = (lbound + ubound) >> 1;
pre = viewsource.childNodes[middle];
var firstLine = parseInt(pre.id.substring(4));
if (lbound == ubound - 1) {
break;
}
if (line >= firstLine) {
lbound = middle;
} else {
ubound = middle;
}
}
var result = {};
var found = findLocation(pre, line, null, -1, false, result);
if (!found) {
return false;
}
var selection = window.content.getSelection();
selection.removeAllRanges();
// In our case, the range's startOffset is after "\n" on the previous line.
// Tune the selection at the beginning of the next line and do some tweaking
// to position the focusNode and the caret at the beginning of the line.
selection.QueryInterface(nsISelectionPrivate)
.interlinePosition = true;
selection.addRange(result.range);
if (!selection.isCollapsed) {
selection.collapseToEnd();
var offset = result.range.startOffset;
var node = result.range.startContainer;
if (offset < node.data.length) {
// The same text node spans across the "\n", just focus where we were.
selection.extend(node, offset);
}
else {
// There is another tag just after the "\n", hook there. We need
// to focus a safe point because there are edgy cases such as
// <span>...\n</span><span>...</span> vs.
// <span>...\n<span>...</span></span><span>...</span>
node = node.nextSibling ? node.nextSibling : node.parentNode.nextSibling;
selection.extend(node, 0);
}
}
var selCon = getSelectionController();
selCon.setDisplaySelection(nsISelectionController.SELECTION_ON);
selCon.setCaretEnabled(true);
selCon.setCaretVisibilityDuringSelection(true);
// Scroll the beginning of the line into view.
selCon.scrollSelectionIntoView(
nsISelectionController.SELECTION_NORMAL,
nsISelectionController.SELECTION_FOCUS_REGION,
true);
gLastLineFound = line;
document.getElementById("statusbar-line-col").label = getViewSourceBundle()
.getFormattedString("statusBarLineCol", [line, 1]);
return true;
}
function updateStatusBar()
{
// Reset the coalesce flag.
gSelectionListener.timeout = 0;
var statusBarField = document.getElementById("statusbar-line-col");
var selection = window.content.getSelection();
if (!selection.focusNode) {
statusBarField.label = '';
return;
}
if (selection.focusNode.nodeType != Node.TEXT_NODE) {
return;
}
var selCon = getSelectionController();
selCon.setDisplaySelection(nsISelectionController.SELECTION_ON);
selCon.setCaretEnabled(true);
selCon.setCaretVisibilityDuringSelection(true);
var interlinePosition = selection
.QueryInterface(nsISelectionPrivate).interlinePosition;
var result = {};
findLocation(null, -1,
selection.focusNode, selection.focusOffset, interlinePosition, result);
statusBarField.label = getViewSourceBundle()
.getFormattedString("statusBarLineCol", [result.line, result.col]);
}
//
// Loops through the text lines in the pre element. The arguments are either
// (pre, line) or (node, offset, interlinePosition). result is an out
// argument. If (pre, line) are specified (and node == null), result.range is
// a range spanning the specified line. If the (node, offset,
// interlinePosition) are specified, result.line and result.col are the line
// and column number of the specified offset in the specified node relative to
// the whole file.
//
function findLocation(pre, line, node, offset, interlinePosition, result)
{
if (node && !pre) {
//
// Look upwards to find the current pre element.
//
for (pre = node;
pre.nodeName != "PRE";
pre = pre.parentNode);
}
//
// The source document is made up of a number of pre elements with
// id attributes in the format <pre id="line123">, meaning that
// the first line in the pre element is number 123.
//
var curLine = parseInt(pre.id.substring(4));
//
// Walk through each of the text nodes and count newlines.
//
var treewalker = window.content.document
.createTreeWalker(pre, NodeFilter.SHOW_TEXT, null, false);
//
// The column number of the first character in the current text node.
//
var firstCol = 1;
var found = false;
for (var textNode = treewalker.firstChild();
textNode && !found;
textNode = treewalker.nextNode()) {
//
// \r is not a valid character in the DOM, so we only check for \n.
//
var lineArray = textNode.data.split(/\n/);
var lastLineInNode = curLine + lineArray.length - 1;
//
// Check if we can skip the text node without further inspection.
//
if (node ? (textNode != node) : (lastLineInNode < line)) {
if (lineArray.length > 1) {
firstCol = 1;
}
firstCol += lineArray[lineArray.length - 1].length;
curLine = lastLineInNode;
continue;
}
//
// curPos is the offset within the current text node of the first
// character in the current line.
//
for (var i = 0, curPos = 0;
i < lineArray.length;
curPos += lineArray[i++].length + 1) {
if (i > 0) {
curLine++;
}
if (node) {
if (offset >= curPos && offset <= curPos + lineArray[i].length) {
//
// If we are right after the \n of a line and interlinePosition is
// false, the caret looks as if it were at the end of the previous
// line, so we display that line and column instead.
//
if (i > 0 && offset == curPos && !interlinePosition) {
result.line = curLine - 1;
var prevPos = curPos - lineArray[i - 1].length;
result.col = (i == 1 ? firstCol : 1) + offset - prevPos;
} else {
result.line = curLine;
result.col = (i == 0 ? firstCol : 1) + offset - curPos;
}
found = true;
break;
}
} else {
if (curLine == line && !("range" in result)) {
result.range = document.createRange();
result.range.setStart(textNode, curPos);
//
// This will always be overridden later, except when we look for
// the very last line in the file (this is the only line that does
// not end with \n).
//
result.range.setEndAfter(pre.lastChild);
} else if (curLine == line + 1) {
result.range.setEnd(textNode, curPos - 1);
found = true;
break;
}
}
}
}
return found || ("range" in result);
}
//function to toggle long-line wrapping and set the view_source.wrap_long_lines
//pref to persist the last state
function wrapLongLines()
{
var myWrap = window.content.document.body;
if (myWrap.className == '')
myWrap.className = 'wrap';
else myWrap.className = '';
//since multiple viewsource windows are possible, another window could have
//affected the pref, so instead of determining the new pref value via the current
//pref value, we use myWrap.className
if (gPrefs){
try {
if (myWrap.className == '') {
gPrefs.setBoolPref("view_source.wrap_long_lines", false);
}
else {
gPrefs.setBoolPref("view_source.wrap_long_lines", true);
}
} catch (ex) {
}
}
}
//function to toggle syntax highlighting and set the view_source.syntax_highlight
//pref to persist the last state
function highlightSyntax()
{
var highlightSyntaxMenu = document.getElementById("menu_highlightSyntax");
var highlightSyntax = (highlightSyntaxMenu.getAttribute("checked") == "true");
gPrefs.setBoolPref("view_source.syntax_highlight", highlightSyntax);
var PageLoader = getBrowser().webNavigation.QueryInterface(pageLoaderIface);
PageLoader.loadPage(PageLoader.currentDescriptor, pageLoaderIface.DISPLAY_NORMAL);
}
// Fix for bug 136322: this function overrides the function in
// browser.js to call PageLoader.loadPage() instead of BrowserReloadWithFlags()
function BrowserSetForcedCharacterSet(aCharset)
{
var docCharset = getBrowser().docShell.QueryInterface(
Components.interfaces.nsIDocCharset);
docCharset.charset = aCharset;
var PageLoader = getBrowser().webNavigation.QueryInterface(pageLoaderIface);
PageLoader.loadPage(PageLoader.currentDescriptor, pageLoaderIface.DISPLAY_NORMAL);
}
function updateSavePageItems()
{
var autoDownload = gPrefs.getBoolPref("browser.download.autoDownload");
goSetMenuValue("savepage", autoDownload ? "valueSave" : "valueSaveAs");
}