/***** BEGIN LICENSE BLOCK ***** {{{
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// TODO: <ESC> should cancel search highlighting in 'incsearch' mode
// make sure you only create this object when the "vimperator" object is ready
function Search() //{{{
{
    var self = this;                  // needed for callbacks since "this" is the "vimperator" object in a callback
    var found = false;                // true if the last search was successful
    var backwards = false;            // currently searching backwards
    var lastsearch = "";              // keep track of the last searched string
    var lastsearch_backwards = false; // like "backwards", but for the last search, so if you cancel a search with <esc> this is not set
    var case_sensitive = true;

    // Event handlers for search - closure is needed
    vimperator.registerCallback("change", vimperator.modes.SEARCH_FORWARD, function(command) { self.searchKeyPressed(command); });
    vimperator.registerCallback("submit", vimperator.modes.SEARCH_FORWARD, function(command) { self.searchSubmitted(command); });
    vimperator.registerCallback("cancel", vimperator.modes.SEARCH_FORWARD, function() { self.searchCanceled(); });
    // TODO: allow advanced modes in register/triggerCallback
    vimperator.registerCallback("change", vimperator.modes.SEARCH_BACKWARD, function(command) { self.searchKeyPressed(command); });
    vimperator.registerCallback("submit", vimperator.modes.SEARCH_BACKWARD, function(command) { self.searchSubmitted(command); });
    vimperator.registerCallback("cancel", vimperator.modes.SEARCH_BACKWARD, function() { self.searchCanceled(); });

    // clean the pattern search string of modifiers and set the
    // case-sensitivity flag
    function processPattern(pattern)
    {
        // strip off pattern terminator and trailing /junk
        if (backwards)
            pattern = pattern.replace(/\?.*/, "");
        else
            pattern = pattern.replace(/\/.*/, "");

        if (!pattern)
            pattern = lastsearch;

        if (/\\C/.test(pattern))
        {
            case_sensitive = true;
            pattern = pattern.replace(/\\C/, "");
        }
        else if (/\\c/.test(pattern))
        {
            case_sensitive = false;
            pattern = pattern.replace(/\\c/, "");
        }
        else if (vimperator.options["ignorecase"] && vimperator.options["smartcase"] && /[A-Z]/.test(pattern))
        {
            case_sensitive = true;
        }
        else if (vimperator.options["ignorecase"])
        {
            case_sensitive = false;
        }
        else
        {
            case_sensitive = true;
        }

        return pattern;
    }

    // Called when the search dialog is asked for
    // If you omit "mode", it will default to forward searching
    this.openSearchDialog = function(mode)
    {
        if (mode == vimperator.modes.SEARCH_BACKWARD)
        {
            vimperator.commandline.open("?", "", vimperator.modes.SEARCH_BACKWARD);
            backwards = true;
        }
        else
        {
            vimperator.commandline.open("/", "", vimperator.modes.SEARCH_FORWARD);
            backwards = false;
        }

        // TODO: focus the top of the currently visible screen
    }

    // Finds text in a page
    // TODO: backwards seems impossible i fear :(
    this.find = function(str, backwards)
    {
        var fastFind = getBrowser().fastFind;
        str = processPattern(str);

        fastFind.caseSensitive = case_sensitive;
        found = fastFind.find(str, false) != Components.interfaces.nsITypeAheadFind.FIND_NOTFOUND;

        return found;
    }

    // Called when the current search needs to be repeated
    this.findAgain = function(reverse)
    {
        // this hack is needed to make n/N work with the correct string, if
        // we typed /foo<esc> after the original search
        // TODO: this should also clear the current item highlighting
        if (getBrowser().fastFind.searchString != lastsearch)
        {
            this.clear();
            this.find(lastsearch, false);
            this.highlight(lastsearch);
        }

        var up = reverse ? !lastsearch_backwards : lastsearch_backwards;
        var result;

        if (up)
            result = getBrowser().fastFind.findPrevious();
        else
            result = getBrowser().fastFind.findNext();

        if (result == Components.interfaces.nsITypeAheadFind.FIND_NOTFOUND)
        {
            vimperator.echoerr("E486: Pattern not found: " + lastsearch);
        }
        else if (result == Components.interfaces.nsITypeAheadFind.FIND_WRAPPED)
        {
            // hack needed, because wrapping causes a "scroll" event which clears
            // our command line
            setTimeout(function() {
                if (up)
                    vimperator.echoerr("search hit TOP, continuing at BOTTOM");
                else
                    vimperator.echoerr("search hit BOTTOM, continuing at TOP");
            }, 10);
        }
        else // just clear the command line if something has been found
        {
            vimperator.echo("");
        }
    }

    // Called when the user types a key in the search dialog. Triggers a find attempt
    this.searchKeyPressed = function(command)
    {
        if (!vimperator.options["incsearch"])
            return;

        this.find(command, backwards);
    }

    // Called when the enter key is pressed to trigger a search
    // use forced_direction if you call this function directly
    this.searchSubmitted = function(command, forced_backward)
    {
        if (typeof forced_backward === "boolean")
            backwards = forced_backward;

        this.clear();
        this.find(command, backwards);
        this.highlight(command);

        // need to find again to draw the highlight of the current search
        // result over the "highlight all" search results
        // very hacky, but seems to work
        setTimeout(function() { self.findAgain(false); }, 10);

        lastsearch_backwards = backwards;
        lastsearch = command;

        vimperator.setMode(vimperator.modes.NORMAL);
        vimperator.focusContent();
    }

    // Called when the search is cancelled - for example if someone presses
    // escape while typing a search
    this.searchCanceled = function()
    {
        //removeMode(MODE_SEARCH);
        vimperator.setMode(vimperator.modes.NORMAL);
        this.clear();
        vimperator.focusContent();
    }

    this.highlight = function(word)
    {
        if (!word)
            word = lastsearch;

        // NOTE: setCaseSensitivity() in FF2 does NOT set the
        // accessibility.typeaheadfind.casesensitive pref as needed by
        // highlightDoc()
        gFindBar.mTypeAheadCaseSensitive = case_sensitive ? 1 : 0;
        gFindBar.highlightDoc("yellow", "black", word);
    }

    this.clear = function()
    {
        gFindBar.highlightDoc();
    }

} //}}}

// vim: set fdm=marker sw=4 ts=4 et: