mirror of
https://github.com/gryf/pentadactyl-pm.git
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472 lines
16 KiB
JavaScript
472 lines
16 KiB
JavaScript
/***** BEGIN LICENSE BLOCK *****
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Version: MPL 1.1/GPL 2.0/LGPL 2.1
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The contents of this file are subject to the Mozilla Public License Version
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1.1 (the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.mozilla.org/MPL/
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Software distributed under the License is distributed on an "AS IS" basis,
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WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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for the specific language governing rights and limitations under the
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License.
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The Initial Developer of the Original Code is Shawn Betts.
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Portions created by the Initial Developer are Copyright (C) 2004,2005
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by the Initial Developer. All Rights Reserved.
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Alternatively, the contents of this file may be used under the terms of
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either the GNU General Public License Version 2 or later (the "GPL"), or
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the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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in which case the provisions of the GPL or the LGPL are applicable instead
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of those above. If you wish to allow use of your version of this file only
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under the terms of either the GPL or the LGPL, and not to allow others to
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use your version of this file under the terms of the MPL, indicate your
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decision by deleting the provisions above and replace them with the notice
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and other provisions required by the GPL or the LGPL. If you do not delete
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the provisions above, a recipient may use your version of this file under
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the terms of any one of the MPL, the GPL or the LGPL.
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***** END LICENSE BLOCK *****/
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// Finder for vimperator
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// Author: Nigel McNie <http://nigel.mcnie.name/>
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// Original Author: Shawn Betts
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//
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// The algorithm was taken from conkeror <http://conkeror.mozdev.net/>, but
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// extensively refactored and changed to behave like vim (naturally!)
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// The window to search in (which frame)
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//var gWin = null;
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//var gSelCtrl = null;
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//function highlight(range, node) {
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// var startContainer = range.startContainer;
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// var startOffset = range.startOffset;
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// var endOffset = range.endOffset;
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// var docfrag = range.extractContents();
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// var before = startContainer.splitText(startOffset);
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// var parent = before.parentNode;
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// node.appendChild(docfrag);
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// parent.insertBefore(node, before);
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// return node;
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//}
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// Clears the current selection
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// @todo this should be in vimperator.js, and not depend on searcher.gSelCtrl
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function clearSelection() {
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//var selctrl = gSelCtrl;
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var selctrl = vimperator.search.gSelCtrl;
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var sel = selctrl.getSelection(Components.interfaces.nsISelectionController.SELECTION_NORMAL);
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sel.removeAllRanges();
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}
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// Sets what is currently selected
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// @todo as for clearSelection
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function setSelection(range) {
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try {
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var selctrlcomp = Components.interfaces.nsISelectionController;
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//var selctrl = gSelCtrl;
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var selctrl = vimperator.search.gSelCtrl;
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var sel = selctrl.getSelection(selctrlcomp.SELECTION_NORMAL);
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sel.removeAllRanges();
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sel.addRange(range.cloneRange());
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selctrl.scrollSelectionIntoView(selctrlcomp.SELECTION_NORMAL,
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selctrlcomp.SELECTION_FOCUS_REGION,
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true);
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}
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catch (e) {
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alert("setSelection: " + e);
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}
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}
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// Highlight find matches and move selection to the first occurrence
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// starting from pt.
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// @todo move into searcher and clean up
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function highlightFind(str, color, wrapped, dir, pt)
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{
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try {
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var gWin = vimperator.search.gWin;//document.commandDispatcher.focusedWindow;
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if (!gWin) {
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alert('gWin does not exist here...');
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alert(vimperator.search.gWin);
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}
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var doc = gWin.document;
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var finder = Components.classes["@mozilla.org/embedcomp/rangefind;1"].createInstance()
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.QueryInterface(Components.interfaces.nsIFind);
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var searchRange;
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var startPt;
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var endPt;
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var body = doc.body;
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finder.findBackwards = !dir;
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searchRange = doc.createRange();
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startPt = doc.createRange();
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endPt = doc.createRange();
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var count = body.childNodes.length;
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// Search range in the doc
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searchRange.setStart(body,0);
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searchRange.setEnd(body, count);
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if (!dir) {
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if (pt == null) {
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startPt.setStart(body, count);
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startPt.setEnd(body, count);
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} else {
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startPt.setStart(pt.startContainer, pt.startOffset);
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startPt.setEnd(pt.startContainer, pt.startOffset);
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}
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endPt.setStart(body, 0);
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endPt.setEnd(body, 0);
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} else {
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if (pt == null) {
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startPt.setStart(body, 0);
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startPt.setEnd(body, 0);
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} else {
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startPt.setStart(pt.endContainer, pt.endOffset);
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startPt.setEnd(pt.endContainer, pt.endOffset);
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}
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endPt.setStart(body, count);
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endPt.setEnd(body, count);
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}
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// search the doc
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var retRange = null;
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var selectionRange = null;
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if (!wrapped) {
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do {
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retRange = finder.Find(str, searchRange, startPt, endPt);
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var keepSearching = false;
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if (retRange) {
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var sc = retRange.startContainer;
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var ec = retRange.endContainer;
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var scp = sc.parentNode;
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var ecp = ec.parentNode;
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var sy1 = abs_point(scp).y;
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var ey2 = abs_point(ecp).y + ecp.offsetHeight;
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startPt = retRange.startContainer.ownerDocument.createRange();
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if (!dir) {
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startPt.setStart(retRange.startContainer, retRange.startOffset);
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startPt.setEnd(retRange.startContainer, retRange.startOffset);
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} else {
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startPt.setStart(retRange.endContainer, retRange.endOffset);
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startPt.setEnd(retRange.endContainer, retRange.endOffset);
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}
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// We want to find a match that is completely
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// visible, otherwise the view will scroll just a
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// bit to fit the selection in completely.
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// alert ("sy1: " + sy1 + " scry: " + gWin.scrollY);
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// alert ("ey2: " + ey2 + " bot: " + (gWin.scrollY + gWin.innerHeight));
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keepSearching = (dir && sy1 < gWin.scrollY)
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|| (!dir && ey2 >= gWin.scrollY + gWin.innerHeight);
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}
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} while (retRange && keepSearching);
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} else {
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retRange = finder.Find(str, searchRange, startPt, endPt);
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}
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if (retRange) {
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setSelection(retRange);
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selectionRange = retRange.cloneRange();
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// highlightAllBut(str, retRange, color);
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} else {
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}
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return selectionRange;
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} catch(e) { alert('highlightFind:'+e); }
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}
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function clearHighlight()
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{
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var win = window._content;
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var doc = win.document;
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if (!document)
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return;
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var elem = null;
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while ((elem = doc.getElementById("__vimperator-findbar-search-id"))) {
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var child = null;
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var docfrag = doc.createDocumentFragment();
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var next = elem.nextSibling;
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var parent = elem.parentNode;
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while((child = elem.firstChild)) {
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docfrag.appendChild(child);
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}
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parent.removeChild(elem);
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parent.insertBefore(docfrag, next);
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}
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}
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/*
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* Finds the absolute X and Y co-ordinates of a given node from the top left of
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* the document
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*
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* Taken from conkeror utils.js
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*/
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function abs_point (node) {
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var orig = node;
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var pt = {};
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try {
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pt.x = node.offsetLeft;
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pt.y = node.offsetTop;
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// Find imagemap's coordinates
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if (node.tagName == "AREA") {
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var coords = node.getAttribute("coords").split(",");
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pt.x += Number(coords[0]);
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pt.y += Number(coords[1]);
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}
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node = node.offsetParent;
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while (node.tagName != "BODY") {
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pt.x += node.offsetLeft;
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pt.y += node.offsetTop;
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node = node.offsetParent;
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}
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}
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catch (e) {
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// Ignore
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}
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return pt;
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}
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// Vimperator searcher
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// make sure you only create this object when the "vimperator" object is ready
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//Vimperator.prototype.search = new function()
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function Search()
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{
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var self = this; // needed for callbacks since "this" is the "vimperator" object in a callback
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this.gWin = null;
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this.gSelCtrl = null;
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this.gFindState = [];
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// Event handlers for search - closure is needed
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vimperator.registerCallback("change", vimperator.modes.SEARCH_FORWARD, function(command){ self.searchKeyPressed(command); });
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vimperator.registerCallback("submit", vimperator.modes.SEARCH_FORWARD, function(command){ self.searchSubmitted(command); });
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vimperator.registerCallback("cancel", vimperator.modes.SEARCH_FORWARD, function(){ self.searchCancelled(); });
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// Called when the search dialog is asked for. Sets up everything necessary
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// for this round of searching
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this.openSearchDialog = function()
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{
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// Get a reference to the focused window if necessary
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if (this.gWin == null) this.gWin = document.commandDispatcher.focusedWindow;
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// Change the currently selected text to not be the attention colour
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// @todo: check what this REALLY does
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try {
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this.gSelCtrl = this.getFocusedSelCtrl();
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this.gSelCtrl.setDisplaySelection(Components.interfaces.nsISelectionController.SELECTION_ATTENTION);
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this.gSelCtrl.repaintSelection(Components.interfaces.nsISelectionController.SELECTION_NORMAL);
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}
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catch (e) {
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alert('Could not change the colour of the current selection:' + e);
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}
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// Initialize the state list for this attempt at searching
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var state = this.createInitialFindState();
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this.gFindState = [];
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this.gFindState.push(state);
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this.resumeFindState(state);
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vimperator.commandline.open('/', '', vimperator.modes.SEARCH_FORWARD);
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}
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// Called when the current search needs to be repeated in the forward
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// direction
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// @todo will need re-jigging when reverse search comes in
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this.findNext = function() {
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this.find(this.lastFindState()["search-str"], true, this.lastFindState()["range"]);
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this.resumeFindState(this.lastFindState());
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// if there is still a search result
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if (this.lastFindState()["range"]) {
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if (this.lastFindState()["wrapped"]) {
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vimperator.echoerr("search hit BOTTOM, continuing at TOP");
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this.lastFindState()["wrapped"] = false;
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}
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else {
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// TODO: this could probably be done in a nicer way - perhaps
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// echoErr could not clobber all of this information somehow?
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vimperator.echo('/' + this.lastFindState()["search-str"]);
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}
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}
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}
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// Called when the current search needs to be repeated in the backward
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// direction
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this.findPrevious = function() {
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this.find(this.lastFindState()["search-str"], false, this.lastFindState()["range"]);
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this.resumeFindState(this.lastFindState());
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// if there is still a search result
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if (this.lastFindState()["range"]) {
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if (this.lastFindState()["wrapped"]) {
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vimperator.echoerr("search hit TOP, continuing at BOTTOM");
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this.lastFindState()["wrapped"] = false;
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}
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else {
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vimperator.echo('/' + this.lastFindState()["search-str"]);
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}
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}
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}
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// Called when the user types a key in the search dialog. Triggers a find attempt
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this.searchKeyPressed = function(command) {
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if (command != "") {
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this.find(vimperator.commandline.getCommand(), true, this.lastFindState()["point"]);
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this.resumeFindState(this.lastFindState());
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}
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else {
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clearSelection();
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}
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}
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// Called when the enter key is pressed to trigger a search
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this.searchSubmitted = function(command) {
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//removeMode(MODE_SEARCH);
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vimperator.setMode(vimperator.modes.NORMAL);
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if (this.lastFindState()["range"] == null) {
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vimperator.echoerr("E492: Pattern not found: " + this.lastFindState()["search-str"]);
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}
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}
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// Called when the search is cancelled - for example if someone presses
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// escape while typing a search
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this.searchCancelled = function() {
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//removeMode(MODE_SEARCH);
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vimperator.setMode(vimperator.modes.NORMAL);
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clearSelection();
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vimperator.focusContent();
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}
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//
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// Helper methods
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//
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// Turn on the selection in all frames
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// @todo to tell the truth, I have no idea what this does
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this.getFocusedSelCtrl = function() {
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var ds = getBrowser().docShell;
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var dsEnum = ds.getDocShellEnumerator(Components.interfaces.nsIDocShellTreeItem.typeContent,
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Components.interfaces.nsIDocShell.ENUMERATE_FORWARDS);
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while (dsEnum.hasMoreElements()) {
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ds = dsEnum.getNext().QueryInterface(Components.interfaces.nsIDocShell);
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if (ds.hasFocus) {
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var display = ds.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
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.getInterface(Components.interfaces.nsISelectionDisplay);
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if (!display) return null;
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return display.QueryInterface(Components.interfaces.nsISelectionController);
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}
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}
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// One last try
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return getBrowser().docShell
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.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
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.getInterface(Components.interfaces.nsISelectionDisplay)
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.QueryInterface(Components.interfaces.nsISelectionController);
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}
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// Creates a default find state
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this.createInitialFindState = function() {
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var state = new Array();
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state["screenx"] = this.gWin.scrollX;
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state["screeny"] = this.gWin.scrollY;
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state["search-str"] = "";
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state["wrapped"] = false;
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state["point"] = null;
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state["range"] = document.createRange();
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state["selection"] = null;
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state["direction"] = true;
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return state;
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}
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// Given a find state, moves the browser to the way it should be in the
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// state - highlighting the correct thing and the screen scrolled to the
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// correct location
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this.resumeFindState = function(state) {
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if (state["selection"]) {
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setSelection(state["selection"]);
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}
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else {
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clearSelection();
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}
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this.gWin.scrollTo(state["screenx"], state["screeny"]);
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}
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// Retrieves the current find state that we're in
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// @todo rename to currentFindState?
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this.lastFindState = function() {
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return this.gFindState[this.gFindState.length - 1];
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}
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// Adds a find state to the stack of such states. This is done every time a find is successful
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this.addFindState = function(screenX, screenY, searchStr, wrapped, point, range, selection, direction) {
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var state = new Array();
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state["screenx"] = screenX;
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state["screeny"] = screenY;
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state["search-str"] = searchStr;
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state["wrapped"] = wrapped;
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state["point"] = point;
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state["range"] = range;
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state["selection"] = selection;
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state["direction"] = direction;
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this.gFindState.push(state);
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}
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// Finds text in a page
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this.find = function(str, dir, pt)
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{
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var norecurse = arguments[3];
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var matchRange;
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clearHighlight();
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// Should we wrap this time?
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var wrapped = this.lastFindState()["wrapped"];
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var point = pt;
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if (this.lastFindState()["wrapped"] == false
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&& this.lastFindState()["range"] == null
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&& this.lastFindState()["search-str"] == str
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&& this.lastFindState()["direction"] == dir) {
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wrapped = true;
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point = null;
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}
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matchRange = highlightFind(str, "lightblue", wrapped, dir, point);
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if (matchRange == null) {
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// No more matches in this direction. So add the state and then find
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// again to wrap around. But only find again once to prevent infinite
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// recursion if an error occurs
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this.addFindState(this.gWin.scrollX, this.gWin.scrollY, str, wrapped, point,
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matchRange, this.lastFindState()["selection"], dir);
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if (!norecurse)
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this.find(str, dir, pt, true);
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}
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else {
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this.addFindState(this.gWin.scrollX, this.gWin.scrollY, str, wrapped,
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point, matchRange, matchRange, dir);
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}
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}
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logMessage("Search initialized");
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}
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// @todo nicer way to register commands?
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vimperator.commands.add(new Command(["noh[lsearch]"],
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clearSelection,
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{
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usage: ["noh[lsearch]"],
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short_help: "Clear the current selection",
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help: null,
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completer: null
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}
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));
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// vim: set fdm=marker sw=4 ts=4 et:
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