gecko-dev/browser/components/tabview/search.js

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JavaScript

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* ******************************
*
* This file incorporates work from:
* Quicksilver Score (qs_score):
* http://rails-oceania.googlecode.com/svn/lachiecox/qs_score/trunk/qs_score.js
* This incorporated work is covered by the following copyright and
* permission notice:
* Copyright 2008 Lachie Cox
* Licensed under the MIT license.
* http://jquery.org/license
*
* ***************************** */
// **********
// Title: search.js
// Implementation for the search functionality of Firefox Panorama.
// ##########
// Class: TabUtils
//
// A collection of helper functions for dealing with both <TabItem>s and
// <xul:tab>s without having to worry which one is which.
let TabUtils = {
// ----------
// Function: toString
// Prints [TabUtils] for debug use.
toString: function TabUtils_toString() {
return "[TabUtils]";
},
// ---------
// Function: nameOfTab
// Given a <TabItem> or a <xul:tab> returns the tab's name.
nameOf: function TabUtils_nameOf(tab) {
// We can have two types of tabs: A <TabItem> or a <xul:tab>
// because we have to deal with both tabs represented inside
// of active Panoramas as well as for windows in which
// Panorama has yet to be activated. We uses object sniffing to
// determine the type of tab and then returns its name.
return tab.label != undefined ? tab.label : tab.$tabTitle[0].textContent;
},
// ---------
// Function: URLOf
// Given a <TabItem> or a <xul:tab> returns the URL of tab.
URLOf: function TabUtils_URLOf(tab) {
// Convert a <TabItem> to <xul:tab>
if ("tab" in tab)
tab = tab.tab;
return tab.linkedBrowser.currentURI.spec;
},
// ---------
// Function: faviconURLOf
// Given a <TabItem> or a <xul:tab> returns the URL of tab's favicon.
faviconURLOf: function TabUtils_faviconURLOf(tab) {
return tab.image != undefined ? tab.image : tab.$favImage[0].src;
},
// ---------
// Function: focus
// Given a <TabItem> or a <xul:tab>, focuses it and it's window.
focus: function TabUtils_focus(tab) {
// Convert a <TabItem> to a <xul:tab>
if ("tab" in tab)
tab = tab.tab;
tab.ownerDocument.defaultView.gBrowser.selectedTab = tab;
tab.ownerDocument.defaultView.focus();
}
};
// ##########
// Class: TabMatcher
//
// A class that allows you to iterate over matching and not-matching tabs,
// given a case-insensitive search term.
function TabMatcher(term) {
this.term = term;
}
TabMatcher.prototype = {
// ----------
// Function: toString
// Prints [TabMatcher (term)] for debug use.
toString: function TabMatcher_toString() {
return "[TabMatcher (" + this.term + ")]";
},
// ---------
// Function: _filterAndSortForMatches
// Given an array of <TabItem>s and <xul:tab>s returns a new array
// of tabs whose name matched the search term, sorted by lexical
// closeness.
_filterAndSortForMatches: function TabMatcher__filterAndSortForMatches(tabs) {
let self = this;
tabs = tabs.filter(function TabMatcher__filterAndSortForMatches_filter(tab) {
let name = TabUtils.nameOf(tab);
let url = TabUtils.URLOf(tab);
return name.match(new RegExp(self.term, "i")) || url.match(new RegExp(self.term, "i"));
});
tabs.sort(function TabMatcher__filterAndSortForMatches_sort(x, y) {
let yScore = self._scorePatternMatch(self.term, TabUtils.nameOf(y));
let xScore = self._scorePatternMatch(self.term, TabUtils.nameOf(x));
return yScore - xScore;
});
return tabs;
},
// ---------
// Function: _filterForUnmatches
// Given an array of <TabItem>s returns an unsorted array of tabs whose name
// does not match the the search term.
_filterForUnmatches: function TabMatcher__filterForUnmatches(tabs) {
let self = this;
return tabs.filter(function TabMatcher__filterForUnmatches_filter(tab) {
let name = tab.$tabTitle[0].textContent;
let url = TabUtils.URLOf(tab);
return !name.match(new RegExp(self.term, "i")) && !url.match(new RegExp(self.term, "i"));
});
},
// ---------
// Function: _getTabsForOtherWindows
// Returns an array of <TabItem>s and <xul:tabs>s representing tabs
// from all windows but the current window. <TabItem>s will be returned
// for windows in which Panorama has been activated at least once, while
// <xul:tab>s will be returned for windows in which Panorama has never
// been activated.
_getTabsForOtherWindows: function TabMatcher__getTabsForOtherWindows() {
let enumerator = Services.wm.getEnumerator("navigator:browser");
let allTabs = [];
while (enumerator.hasMoreElements()) {
let win = enumerator.getNext();
// This function gets tabs from other windows, not from the current window
if (win != gWindow)
allTabs.push.apply(allTabs, win.gBrowser.tabs);
}
return allTabs;
},
// ----------
// Function: matchedTabsFromOtherWindows
// Returns an array of <TabItem>s and <xul:tab>s that match the search term
// from all windows but the current window. <TabItem>s will be returned for
// windows in which Panorama has been activated at least once, while
// <xul:tab>s will be returned for windows in which Panorama has never
// been activated.
// (new TabMatcher("app")).matchedTabsFromOtherWindows();
matchedTabsFromOtherWindows: function TabMatcher_matchedTabsFromOtherWindows() {
if (this.term.length < 2)
return [];
let tabs = this._getTabsForOtherWindows();
return this._filterAndSortForMatches(tabs);
},
// ----------
// Function: matched
// Returns an array of <TabItem>s which match the current search term.
// If the term is less than 2 characters in length, it returns nothing.
matched: function TabMatcher_matched() {
if (this.term.length < 2)
return [];
let tabs = TabItems.getItems();
return this._filterAndSortForMatches(tabs);
},
// ----------
// Function: unmatched
// Returns all of <TabItem>s that .matched() doesn't return.
unmatched: function TabMatcher_unmatched() {
let tabs = TabItems.getItems();
if (this.term.length < 2)
return tabs;
return this._filterForUnmatches(tabs);
},
// ----------
// Function: doSearch
// Performs the search. Lets you provide three functions.
// The first is on all matched tabs in the window, the second on all unmatched
// tabs in the window, and the third on all matched tabs in other windows.
// The first two functions take two parameters: A <TabItem> and its integer index
// indicating the absolute rank of the <TabItem> in terms of match to
// the search term. The last function also takes two paramaters, but can be
// passed both <TabItem>s and <xul:tab>s and the index is offset by the
// number of matched tabs inside the window.
doSearch: function TabMatcher_doSearch(matchFunc, unmatchFunc, otherFunc) {
let matches = this.matched();
let unmatched = this.unmatched();
let otherMatches = this.matchedTabsFromOtherWindows();
matches.forEach(function(tab, i) {
matchFunc(tab, i);
});
otherMatches.forEach(function(tab,i) {
otherFunc(tab, i+matches.length);
});
unmatched.forEach(function(tab, i) {
unmatchFunc(tab, i);
});
},
// ----------
// Function: _scorePatternMatch
// Given a pattern string, returns a score between 0 and 1 of how well
// that pattern matches the original string. It mimics the heuristics
// of the Mac application launcher Quicksilver.
_scorePatternMatch: function TabMatcher__scorePatternMatch(pattern, matched, offset) {
offset = offset || 0;
pattern = pattern.toLowerCase();
matched = matched.toLowerCase();
if (pattern.length == 0)
return 0.9;
if (pattern.length > matched.length)
return 0.0;
for (let i = pattern.length; i > 0; i--) {
let sub_pattern = pattern.substring(0,i);
let index = matched.indexOf(sub_pattern);
if (index < 0)
continue;
if (index + pattern.length > matched.length + offset)
continue;
let next_string = matched.substring(index+sub_pattern.length);
let next_pattern = null;
if (i >= pattern.length)
next_pattern = '';
else
next_pattern = pattern.substring(i);
let remaining_score = this._scorePatternMatch(next_pattern, next_string, offset + index);
if (remaining_score > 0) {
let score = matched.length-next_string.length;
if (index != 0) {
let c = matched.charCodeAt(index-1);
if (c == 32 || c == 9) {
for (let j = (index - 2); j >= 0; j--) {
c = matched.charCodeAt(j);
score -= ((c == 32 || c == 9) ? 1 : 0.15);
}
} else {
score -= index;
}
}
score += remaining_score * next_string.length;
score /= matched.length;
return score;
}
}
return 0.0;
}
};
// ##########
// Class: TabHandlers
//
// A object that handles all of the event handlers.
let TabHandlers = {
_mouseDownLocation: null,
// ---------
// Function: onMatch
// Adds styles and event listeners to the matched tab items.
onMatch: function TabHandlers_onMatch(tab, index) {
tab.addClass("onTop");
index != 0 ? tab.addClass("notMainMatch") : tab.removeClass("notMainMatch");
// Remove any existing handlers before adding the new ones.
// If we don't do this, then we may add more handlers than
// we remove.
tab.$canvas
.unbind("mousedown", TabHandlers._hideHandler)
.unbind("mouseup", TabHandlers._showHandler);
tab.$canvas
.mousedown(TabHandlers._hideHandler)
.mouseup(TabHandlers._showHandler);
},
// ---------
// Function: onUnmatch
// Removes styles and event listeners from the unmatched tab items.
onUnmatch: function TabHandlers_onUnmatch(tab, index) {
tab.$container.removeClass("onTop");
tab.removeClass("notMainMatch");
tab.$canvas
.unbind("mousedown", TabHandlers._hideHandler)
.unbind("mouseup", TabHandlers._showHandler);
},
// ---------
// Function: onOther
// Removes styles and event listeners from the unmatched tabs.
onOther: function TabHandlers_onOther(tab, index) {
// Unlike the other on* functions, in this function tab can
// either be a <TabItem> or a <xul:tab>. In other functions
// it is always a <TabItem>. Also note that index is offset
// by the number of matches within the window.
let item = iQ("<div/>")
.addClass("inlineMatch")
.click(function TabHandlers_onOther_click(event) {
Search.hide(event);
TabUtils.focus(tab);
});
iQ("<img/>")
.attr("src", TabUtils.faviconURLOf(tab))
.appendTo(item);
iQ("<span/>")
.text(TabUtils.nameOf(tab))
.appendTo(item);
index != 0 ? item.addClass("notMainMatch") : item.removeClass("notMainMatch");
item.appendTo("#results");
iQ("#otherresults").show();
},
// ---------
// Function: _hideHandler
// Performs when mouse down on a canvas of tab item.
_hideHandler: function TabHandlers_hideHandler(event) {
iQ("#search").fadeOut();
iQ("#searchshade").fadeOut();
TabHandlers._mouseDownLocation = {x:event.clientX, y:event.clientY};
},
// ---------
// Function: _showHandler
// Performs when mouse up on a canvas of tab item.
_showHandler: function TabHandlers_showHandler(event) {
// If the user clicks on a tab without moving the mouse then
// they are zooming into the tab and we need to exit search
// mode.
if (TabHandlers._mouseDownLocation.x == event.clientX &&
TabHandlers._mouseDownLocation.y == event.clientY) {
Search.hide();
return;
}
iQ("#searchshade").show();
iQ("#search").show();
iQ("#searchbox")[0].focus();
// Marshal the search.
setTimeout(Search.perform, 0);
}
};
// ##########
// Class: Search
//
// A object that handles the search feature.
let Search = {
_initiatedBy: "",
_blockClick: false,
_currentHandler: null,
// ----------
// Function: toString
// Prints [Search] for debug use.
toString: function Search_toString() {
return "[Search]";
},
// ----------
// Function: init
// Initializes the searchbox to be focused, and everything else to be hidden,
// and to have everything have the appropriate event handlers.
init: function Search_init() {
let self = this;
iQ("#search").hide();
iQ("#searchshade").hide().mousedown(function Search_init_shade_mousedown(event) {
if (event.target.id != "searchbox" && !self._blockClick)
self.hide();
});
iQ("#searchbox").keyup(function Search_init_box_keyup() {
self.perform();
})
.attr("title", tabviewString("button.searchTabs"));
iQ("#searchbutton").mousedown(function Search_init_button_mousedown() {
self._initiatedBy = "buttonclick";
self.ensureShown();
self.switchToInMode();
})
.attr("title", tabviewString("button.searchTabs"));
window.addEventListener("focus", function Search_init_window_focus() {
if (self.isEnabled()) {
self._blockClick = true;
setTimeout(function() {
self._blockClick = false;
}, 0);
}
}, false);
this.switchToBeforeMode();
},
// ----------
// Function: _beforeSearchKeyHandler
// Handles all keydown before the search interface is brought up.
_beforeSearchKeyHandler: function Search__beforeSearchKeyHandler(event) {
// Only match reasonable text-like characters for quick search.
if (event.altKey || event.ctrlKey || event.metaKey)
return;
if ((event.keyCode > 0 && event.keyCode <= event.DOM_VK_DELETE) ||
event.keyCode == event.DOM_VK_CONTEXT_MENU ||
event.keyCode == event.DOM_VK_SLEEP ||
(event.keyCode >= event.DOM_VK_F1 &&
event.keyCode <= event.DOM_VK_SCROLL_LOCK) ||
event.keyCode == event.DOM_VK_META ||
event.keyCode == 91 || // 91 = left windows key
event.keyCode == 92 || // 92 = right windows key
(!event.keyCode && !event.charCode)) {
return;
}
// If we are already in an input field, allow typing as normal.
if (event.target.nodeName == "INPUT")
return;
// / is used to activate the search feature so the key shouldn't be entered
// into the search box.
if (event.keyCode == KeyEvent.DOM_VK_SLASH) {
event.stopPropagation();
event.preventDefault();
}
this.switchToInMode();
this._initiatedBy = "keydown";
this.ensureShown(true);
},
// ----------
// Function: _inSearchKeyHandler
// Handles all keydown while search mode.
_inSearchKeyHandler: function Search__inSearchKeyHandler(event) {
let term = iQ("#searchbox").val();
if ((event.keyCode == event.DOM_VK_ESCAPE) ||
(event.keyCode == event.DOM_VK_BACK_SPACE && term.length <= 1 &&
this._initiatedBy == "keydown")) {
this.hide(event);
return;
}
let matcher = this.createSearchTabMatcher();
let matches = matcher.matched();
let others = matcher.matchedTabsFromOtherWindows();
if (event.keyCode == event.DOM_VK_RETURN &&
(matches.length > 0 || others.length > 0)) {
this.hide(event);
if (matches.length > 0)
matches[0].zoomIn();
else
TabUtils.focus(others[0]);
}
},
// ----------
// Function: switchToBeforeMode
// Make sure the event handlers are appropriate for the before-search mode.
switchToBeforeMode: function Search_switchToBeforeMode() {
let self = this;
if (this._currentHandler)
iQ(window).unbind("keydown", this._currentHandler);
this._currentHandler = function Search_switchToBeforeMode_handler(event) {
self._beforeSearchKeyHandler(event);
}
iQ(window).keydown(this._currentHandler);
},
// ----------
// Function: switchToInMode
// Make sure the event handlers are appropriate for the in-search mode.
switchToInMode: function Search_switchToInMode() {
let self = this;
if (this._currentHandler)
iQ(window).unbind("keydown", this._currentHandler);
this._currentHandler = function Search_switchToInMode_handler(event) {
self._inSearchKeyHandler(event);
}
iQ(window).keydown(this._currentHandler);
},
createSearchTabMatcher: function Search_createSearchTabMatcher() {
return new TabMatcher(iQ("#searchbox").val());
},
// ----------
// Function: isEnabled
// Checks whether search mode is enabled or not.
isEnabled: function Search_isEnabled() {
return iQ("#search").css("display") != "none";
},
// ----------
// Function: hide
// Hides search mode.
hide: function Search_hide(event) {
if (!this.isEnabled())
return;
iQ("#searchbox").val("");
iQ("#searchshade").hide();
iQ("#search").hide();
iQ("#searchbutton").css({ opacity:.8 });
#ifdef XP_MACOSX
UI.setTitlebarColors(true);
#endif
this.perform();
this.switchToBeforeMode();
if (event) {
// when hiding the search mode, we need to prevent the keypress handler
// in UI__setTabViewFrameKeyHandlers to handle the key press again. e.g. Esc
// which is already handled by the key down in this class.
if (event.type == "keydown")
UI.ignoreKeypressForSearch = true;
event.preventDefault();
event.stopPropagation();
}
// Return focus to the tab window
UI.blurAll();
gTabViewFrame.contentWindow.focus();
let newEvent = document.createEvent("Events");
newEvent.initEvent("tabviewsearchdisabled", false, false);
dispatchEvent(newEvent);
},
// ----------
// Function: perform
// Performs a search.
perform: function Search_perform() {
let matcher = this.createSearchTabMatcher();
// Remove any previous other-window search results and
// hide the display area.
iQ("#results").empty();
iQ("#otherresults").hide();
iQ("#otherresults>.label").text(tabviewString("search.otherWindowTabs"));
matcher.doSearch(TabHandlers.onMatch, TabHandlers.onUnmatch, TabHandlers.onOther);
},
// ----------
// Function: ensureShown
// Ensures the search feature is displayed. If not, display it.
// Parameters:
// - a boolean indicates whether this is triggered by a keypress or not
ensureShown: function Search_ensureShown(activatedByKeypress) {
let $search = iQ("#search");
let $searchShade = iQ("#searchshade");
let $searchbox = iQ("#searchbox");
iQ("#searchbutton").css({ opacity: 1 });
// NOTE: when this function is called by keydown handler, next keypress
// event or composition events of IME will be fired on the focused editor.
function dispatchTabViewSearchEnabledEvent() {
let newEvent = document.createEvent("Events");
newEvent.initEvent("tabviewsearchenabled", false, false);
dispatchEvent(newEvent);
};
if (!this.isEnabled()) {
$searchShade.show();
$search.show();
#ifdef XP_MACOSX
UI.setTitlebarColors({active: "#717171", inactive: "#EDEDED"});
#endif
if (activatedByKeypress) {
// set the focus so key strokes are entered into the textbox.
$searchbox[0].focus();
dispatchTabViewSearchEnabledEvent();
} else {
// marshal the focusing, otherwise it ends up with searchbox[0].focus gets
// called before the search button gets the focus after being pressed.
setTimeout(function setFocusAndDispatchSearchEnabledEvent() {
$searchbox[0].focus();
dispatchTabViewSearchEnabledEvent();
}, 0);
}
}
}
};