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findBar.js
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2004-11-05
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const FIND_NORMAL = 0;
const FIND_TYPEAHEAD = 1;
const FIND_LINKS = 2;
// Global find variables
var gFindMode = FIND_NORMAL;
var gQuickFindTimeout = null;
var gQuickFindTimeoutLength = 0;
var gHighlightTimeout = null;
var gUseTypeAheadFind = false;
var gWrappedToTopStr = "";
var gWrappedToBottomStr = "";
var gNotFoundStr = "";
var gTypeAheadFindBuffer = "";
var gIsBack = true;
var gBackProtectBuffer = 3;
var gFlashFindBar = 0;
var gFlashFindBarCount = 6;
var gFlashFindBarTimeout = null;
var gLastHighlightString = "";
var gTypeAheadLinksOnly = false;
// DOMRange used during highlighting
var searchRange;
var startPt;
var endPt;
var gTypeAheadFind = {
useTAFPref: "accessibility.typeaheadfind",
searchLinksPref: "accessibility.typeaheadfind.linksonly",
observe: function(aSubject, aTopic, aPrefName)
{
if (aTopic != "nsPref:changed" || (aPrefName != this.useTAFPref && aPrefName != this.searchLinksPref))
return;
var prefService = Components.classes["@mozilla.org/preferences-service;1"]
.getService(Components.interfaces.nsIPrefBranch);
gUseTypeAheadFind = prefService.getBoolPref("accessibility.typeaheadfind");
gTypeAheadLinksOnly = gPrefService.getBoolPref("accessibility.typeaheadfind.linksonly");
}
};
function initFindBar()
{
getBrowser().addEventListener("keypress", onBrowserKeyPress, false);
getBrowser().addEventListener("mousedown", onBrowserMouseDown, false);
var prefService = Components.classes["@mozilla.org/preferences-service;1"]
.getService(Components.interfaces.nsIPrefBranch);
var pbi = prefService.QueryInterface(Components.interfaces.nsIPrefBranchInternal);
gQuickFindTimeoutLength = prefService.getIntPref("accessibility.typeaheadfind.timeout");
gFlashFindBar = prefService.getIntPref("accessibility.typeaheadfind.flashBar");
pbi.addObserver(gTypeAheadFind.useTAFPref, gTypeAheadFind, false);
pbi.addObserver(gTypeAheadFind.searchLinksPref, gTypeAheadFind, false);
gUseTypeAheadFind = prefService.getBoolPref("accessibility.typeaheadfind");
gTypeAheadLinksOnly = prefService.getBoolPref("accessibility.typeaheadfind.linksonly");
}
function uninitFindBar()
{
var prefService = Components.classes["@mozilla.org/preferences-service;1"]
.getService(Components.interfaces.nsIPrefBranch);
var pbi = prefService.QueryInterface(Components.interfaces.nsIPrefBranchInternal);
pbi.removeObserver(gTypeAheadFind.useTAFPref, gTypeAheadFind);
pbi.removeObserver(gTypeAheadFind.searchLinksPref, gTypeAheadFind);
getBrowser().removeEventListener("keypress", onBrowserKeyPress, false);
getBrowser().removeEventListener("mousedown", onBrowserMouseDown, false);
}
function toggleHighlight(aHighlight)
{
var word = document.getElementById("find-field").value;
if (aHighlight) {
highlightDoc('yellow', word);
} else {
highlightDoc(null, null);
gLastHighlightString = null;
}
}
function highlightDoc(color, word, win)
{
if (!win)
win = window._content;
for (var i = 0; win.frames && i < win.frames.length; i++) {
highlightDoc(color, word, win.frames[i]);
}
var doc = win.document;
if (!document)
return;
if (!("body" in doc))
return;
var body = doc.body;
var count = body.childNodes.length;
searchRange = doc.createRange();
startPt = doc.createRange();
endPt = doc.createRange();
searchRange.setStart(body, 0);
searchRange.setEnd(body, count);
startPt.setStart(body, 0);
startPt.setEnd(body, 0);
endPt.setStart(body, count);
endPt.setEnd(body, count);
if (!color) {
// Remove highlighting. We use the find API again rather than
// searching for our span elements by id so that we gain access to the
// anonymous content that nsIFind searches.
if (!gLastHighlightString)
return;
var retRange = null;
var finder = Components.classes["@mozilla.org/embedcomp/rangefind;1"].createInstance()
.QueryInterface(Components.interfaces.nsIFind);
while ((retRange = finder.Find(gLastHighlightString, searchRange,startPt, endPt))) {
var startContainer = retRange.startContainer;
var elem = null;
try {
elem = startContainer.parentNode;
}
catch (e) { }
if (elem && elem.getAttribute("id") == "__firefox-findbar-search-id") {
var child = null;
var docfrag = doc.createDocumentFragment();
var next = elem.nextSibling;
var parent = elem.parentNode;
while ((child = elem.firstChild)) {
docfrag.appendChild(child);
}
startPt = doc.createRange();
startPt.setStartAfter(elem);
parent.removeChild(elem);
parent.insertBefore(docfrag, next);
}
else {
// Somehow we didn't highlight this instance; just skip it.
startPt = doc.createRange();
startPt.setStart(retRange.endContainer, retRange.endOffset);
}
startPt.collapse(true);
}
return;
}
var baseNode = doc.createElement("span");
baseNode.setAttribute("style", "background-color: " + color + ";");
baseNode.setAttribute("id", "__firefox-findbar-search-id");
highlightText(word, baseNode);
}
function highlightText(word, baseNode)
{
var retRange = null;
var finder = Components.classes["@mozilla.org/embedcomp/rangefind;1"].createInstance()
.QueryInterface(Components.interfaces.nsIFind);
finder.caseSensitive = document.getElementById("find-case-sensitive").checked;
while((retRange = finder.Find(word, searchRange, startPt, endPt))) {
// Highlight
var nodeSurround = baseNode.cloneNode(true);
var node = highlight(retRange, nodeSurround);
startPt = node.ownerDocument.createRange();
startPt.setStart(node, node.childNodes.length);
startPt.setEnd(node, node.childNodes.length);
}
gLastHighlightString = word;
}
function highlight(range, node)
{
var startContainer = range.startContainer;
var startOffset = range.startOffset;
var endOffset = range.endOffset;
var docfrag = range.extractContents();
var before = startContainer.splitText(startOffset);
var parent = before.parentNode;
node.appendChild(docfrag);
parent.insertBefore(node, before);
return node;
}
function getSelectionControllerForFindToolbar(ds)
{
var display = ds.QueryInterface(Components.interfaces.nsIInterfaceRequestor).getInterface(Components.interfaces.nsISelectionDisplay);
if (!display)
return null;
return display.QueryInterface(Components.interfaces.nsISelectionController);
}
function toggleCaseSensitivity(aCaseSensitive)
{
var fastFind = getBrowser().fastFind;
fastFind.caseSensitive = aCaseSensitive;
if (gFindMode != FIND_NORMAL)
setFindCloseTimeout();
}
function changeSelectionColor(aAttention)
{
var ds = getBrowser().docShell;
var dsEnum = ds.getDocShellEnumerator(Components.interfaces.nsIDocShellTreeItem.typeContent,
Components.interfaces.nsIDocShell.ENUMERATE_FORWARDS);
while (dsEnum.hasMoreElements()) {
ds = dsEnum.getNext().QueryInterface(Components.interfaces.nsIDocShell);
var controller = getSelectionControllerForFindToolbar(ds);
if (!controller)
continue;
const selCon = Components.interfaces.nsISelectionController;
controller.setDisplaySelection(aAttention? selCon.SELECTION_ATTENTION : selCon.SELECTION_ON);
}
}
function openFindBar()
{
if (!gNotFoundStr || !gWrappedToTopStr || !gWrappedToBottomStr) {
var bundle = document.getElementById("bundle_findBar");
gNotFoundStr = bundle.getString("NotFound");
gWrappedToTopStr = bundle.getString("WrappedToTop");
gWrappedToBottomStr = bundle.getString("WrappedToBottom");
}
var findToolbar = document.getElementById("FindToolbar");
if (findToolbar.hidden) {
findToolbar.hidden = false;
var statusIcon = document.getElementById("find-status-icon");
var statusText = document.getElementById("find-status");
var findField = document.getElementById("find-field");
findField.removeAttribute("status");
statusIcon.removeAttribute("status");
statusText.value = "";
return true;
}
return false;
}
function focusFindBar()
{
var findField = document.getElementById("find-field");
findField.focus();
}
function selectFindBar()
{
var findField = document.getElementById("find-field");
findField.select();
}
function closeFindBar()
{
var findField = document.getElementById("find-field");
var ww = Components.classes["@mozilla.org/embedcomp/window-watcher;1"]
.getService(Components.interfaces.nsIWindowWatcher);
if (window == ww.activeWindow && document.commandDispatcher.focusedElement &&
document.commandDispatcher.focusedElement.parentNode.parentNode == findField) {
_content.focus();
}
var findToolbar = document.getElementById("FindToolbar");
findToolbar.hidden = true;
gTypeAheadFindBuffer = "";
changeSelectionColor(false);
if (gQuickFindTimeout) {
clearTimeout(gQuickFindTimeout);
gQuickFindTimeout = null;
}
}
function shouldFastFind(evt)
{
if (evt.ctrlKey || evt.altKey || evt.metaKey || evt.getPreventDefault())
return false;
var elt = document.commandDispatcher.focusedElement;
if (elt) {
var ln = elt.localName.toLowerCase();
if (ln == "input" || ln == "textarea" || ln == "select" || ln == "button" || ln == "isindex")
return false;
}
var win = document.commandDispatcher.focusedWindow;
if (win && win.document.designMode == "on")
return false;
return true;
}
function onFindBarFocus()
{
toggleLinkFocus(false);
}
function onFindBarBlur()
{
toggleLinkFocus(true);
changeSelectionColor(false);
}
function onBrowserMouseDown(evt)
{
var findToolbar = document.getElementById("FindToolbar");
if (!findToolbar.hidden && gFindMode != FIND_NORMAL)
closeFindBar();
}
function onBrowserKeyPress(evt)
{
// Check focused elt
if (!shouldFastFind(evt))
return;
var findField = document.getElementById("find-field");
if (gFindMode != FIND_NORMAL && gQuickFindTimeout) {
if (evt.keyCode == 8) { // Backspace
if (findField.value) {
findField.value = findField.value.substr(0, findField.value.length - 1);
gIsBack = true;
gBackProtectBuffer = 3;
}
else if (gBackProtectBuffer > 0) {
gBackProtectBuffer--;
}
if (gIsBack || gBackProtectBuffer > 0)
evt.preventDefault();
find(findField.value);
}
else if (evt.keyCode == 27) { // Escape
closeFindBar();
evt.preventDefault();
}
else if (evt.charCode) {
if (evt.charCode == 32) // Space
evt.preventDefault();
findField.value += String.fromCharCode(evt.charCode);
find(findField.value);
}
return;
}
if (evt.charCode == 39 /* ' */ || evt.charCode == 47 /* / */ || (gUseTypeAheadFind && evt.charCode && evt.charCode != 32)) {
gFindMode = (evt.charCode == 39 || (gTypeAheadLinksOnly && evt.charCode != 47)) ? FIND_LINKS : FIND_TYPEAHEAD;
toggleLinkFocus(true);
if (openFindBar()) {
setFindCloseTimeout();
if (gUseTypeAheadFind && evt.charCode != 39 && evt.charCode != 47) {
gTypeAheadFindBuffer += String.fromCharCode(evt.charCode);
findField.value = gTypeAheadFindBuffer;
find(findField.value);
}
else {
findField.value = "";
}
}
else {
if (gFindMode == FIND_NORMAL) {
selectFindBar();
focusFindBar();
}
else {
findField.value = String.fromCharCode(evt.charCode);
find(findField.value);
}
}
}
}
function toggleLinkFocus(aFocusLinks)
{
var fastFind = getBrowser().fastFind;
fastFind.focusLinks = aFocusLinks;
}
function onBrowserKeyUp(evt)
{
if (evt.keyCode == 8)
gIsBack = false;
}
function onFindBarKeyPress(evt)
{
if (evt.keyCode == KeyEvent.DOM_VK_RETURN) {
var findString = document.getElementById("find-field");
if (!findString.value)
return;
if (evt.ctrlKey) {
document.getElementById("highlight").click();
return;
}
if (evt.shiftKey)
findPrevious();
else
findNext();
}
else if (evt.keyCode == KeyEvent.DOM_VK_ESCAPE) {
closeFindBar();
evt.preventDefault();
}
else if (evt.keyCode == KeyEvent.DOM_VK_PAGE_UP) {
window.top._content.scrollByPages(-1);
evt.preventDefault();
}
else if (evt.keyCode == KeyEvent.DOM_VK_PAGE_DOWN) {
window.top._content.scrollByPages(1);
evt.preventDefault();
}
else if (evt.keyCode == KeyEvent.DOM_VK_UP) {
window.top._content.scrollByLines(-1);
evt.preventDefault();
}
else if (evt.keyCode == KeyEvent.DOM_VK_DOWN) {
window.top._content.scrollByLines(1);
evt.preventDefault();
}
}
function enableFindButtons(aEnable)
{
var findNext = document.getElementById("find-next");
var findPrev = document.getElementById("find-previous");
var highlight = document.getElementById("highlight");
findNext.disabled = findPrev.disabled = highlight.disabled = !aEnable;
}
function find(val)
{
if (!val)
val = document.getElementById("find-field").value;
enableFindButtons(val);
var highlightBtn = document.getElementById("highlight");
if (highlightBtn.checked)
setHighlightTimeout();
changeSelectionColor(true);
var fastFind = getBrowser().fastFind;
var res = fastFind.find(val, gFindMode == FIND_LINKS);
updateStatus(res, true);
if (gFindMode != FIND_NORMAL)
setFindCloseTimeout();
}
function flashFindBar()
{
var findToolbar = document.getElementById("FindToolbar");
if (gFlashFindBarCount-- == 0) {
clearInterval(gFlashFindBarTimeout);
findToolbar.removeAttribute("flash");
gFlashFindBarCount = 6;
return true;
}
findToolbar.setAttribute("flash", (gFlashFindBarCount % 2 == 0) ? "false" : "true");
}
function onFindCmd()
{
gFindMode = FIND_NORMAL;
openFindBar();
if (gFlashFindBar) {
gFlashFindBarTimeout = setInterval(flashFindBar, 500);
var prefService = Components.classes["@mozilla.org/preferences-service;1"]
.getService(Components.interfaces.nsIPrefBranch);
prefService.setIntPref("accessibility.typeaheadfind.flashBar", --gFlashFindBar);
}
selectFindBar();
focusFindBar();
}
function onFindAgainCmd()
{
var findString = getBrowser().findString;
if (!findString)
return onFindCmd();
var res = findNext();
if (res == Components.interfaces.nsITypeAheadFind.FIND_NOTFOUND) {
if (openFindBar()) {
focusFindBar();
selectFindBar();
if (gFindMode != FIND_NORMAL)
setFindCloseTimeout();
updateStatus(res, true);
}
}
}
function onFindPreviousCmd()
{
var findString = getBrowser().findString;
if (!findString)
return onFindCmd();
var res = findPrevious();
if (res == Components.interfaces.nsITypeAheadFind.FIND_NOTFOUND) {
if (openFindBar()) {
focusFindBar();
selectFindBar();
if (gFindMode != FIND_NORMAL)
setFindCloseTimeout();
updateStatus(res, false);
}
}
}
function setHighlightTimeout()
{
if (gHighlightTimeout)
clearTimeout(gHighlightTimeout);
gHighlightTimeout = setTimeout(function() { toggleHighlight(false); toggleHighlight(true); }, 500);
}
function isFindBarVisible()
{
var findBar = document.getElementById("FindToolbar");
return !findBar.hidden;
}
function findNext()
{
changeSelectionColor(true);
var fastFind = getBrowser().fastFind;
var res = fastFind.findNext();
updateStatus(res, true);
if (gFindMode != FIND_NORMAL && isFindBarVisible())
setFindCloseTimeout();
return res;
}
function findPrevious()
{
changeSelectionColor(true);
var fastFind = getBrowser().fastFind;
var res = fastFind.findPrevious();
updateStatus(res, false);
if (gFindMode != FIND_NORMAL && isFindBarVisible())
setFindCloseTimeout();
return res;
}
function updateStatus(res, findNext)
{
var findBar = document.getElementById("FindToolbar");
var field = document.getElementById("find-field");
var statusIcon = document.getElementById("find-status-icon");
var statusText = document.getElementById("find-status");
switch(res) {
case Components.interfaces.nsITypeAheadFind.FIND_WRAPPED:
statusIcon.setAttribute("status", "wrapped");
statusText.value = findNext ? gWrappedToTopStr : gWrappedToBottomStr;
break;
case Components.interfaces.nsITypeAheadFind.FIND_NOTFOUND:
statusIcon.setAttribute("status", "notfound");
statusText.value = gNotFoundStr;
field.setAttribute("status", "notfound");
break;
case Components.interfaces.nsITypeAheadFind.FIND_FOUND:
default:
statusIcon.removeAttribute("status");
statusText.value = "";
field.removeAttribute("status");
break;
}
}
function setFindCloseTimeout()
{
if (gQuickFindTimeout)
clearTimeout(gQuickFindTimeout);
gQuickFindTimeout = setTimeout(function() { if (gFindMode != FIND_NORMAL) closeFindBar(); }, gQuickFindTimeoutLength);
}