/*
   © Copyright The SIMILE Project 2003-2005.
   
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.

3. The name of the author may not be used to endorse or promote products
   derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
function centerTimeline(date) {
    tl.getBand(0).setCenterVisibleDate(Timeline.DateTime.parseGregorianDateTime(date));
}

function setupFilterHighlightControls(div, timeline, bandIndices, theme) {
    var table = document.createElement("table");
    var tr = table.insertRow(0);
    
    var td = tr.insertCell(0);
    td.innerHTML = "Filter:";
    
    td = tr.insertCell(1);
    td.innerHTML = "Highlight:";
    
    var handler = function(elmt, evt, target) {
        onKeyPress(timeline, bandIndices, table);
    };
    
    tr = table.insertRow(1);
    tr.style.verticalAlign = "top";
    
    td = tr.insertCell(0);
    
    var input = document.createElement("input");
    input.type = "text";
    Timeline.DOM.registerEvent(input, "keypress", handler);
    td.appendChild(input);
    
    for (var i = 0; i < theme.event.highlightColors.length; i++) {
        td = tr.insertCell(i + 1);
        
        input = document.createElement("input");
        input.type = "text";
        Timeline.DOM.registerEvent(input, "keypress", handler);
        td.appendChild(input);
        
        var divColor = document.createElement("div");
        divColor.style.height = "0.5em";
        divColor.style.background = theme.event.highlightColors[i];
        td.appendChild(divColor);
    }
    
    td = tr.insertCell(tr.cells.length);
    var button = document.createElement("button");
    button.innerHTML = "Clear All";
    Timeline.DOM.registerEvent(button, "click", function() {
        clearAll(timeline, bandIndices, table);
    });
    td.appendChild(button);
    
    div.appendChild(table);
}

var timerID = null;
function onKeyPress(timeline, bandIndices, table) {
    if (timerID != null) {
        window.clearTimeout(timerID);
    }
    timerID = window.setTimeout(function() {
        performFiltering(timeline, bandIndices, table);
    }, 300);
}
function cleanString(s) {
    return s.replace(/^\s+/, '').replace(/\s+$/, '');
}
function performFiltering(timeline, bandIndices, table) {
    timerID = null;
    
    var tr = table.rows[1];
    var text = cleanString(tr.cells[0].firstChild.value);
    
    var filterMatcher = null;
    if (text.length > 0) {
        var regex = new RegExp(text, "i");
        filterMatcher = function(evt) {
            return regex.test(evt.getText()) || regex.test(evt.getDescription());
        };
    }
    
    var regexes = [];
    var hasHighlights = false;
    for (var x = 1; x < tr.cells.length - 1; x++) {
        var input = tr.cells[x].firstChild;
        var text2 = cleanString(input.value);
        if (text2.length > 0) {
            hasHighlights = true;
            regexes.push(new RegExp(text2, "i"));
        } else {
            regexes.push(null);
        }
    }
    var highlightMatcher = hasHighlights ? function(evt) {
        var text = evt.getText();
        var description = evt.getDescription();
        for (var x = 0; x < regexes.length; x++) {
            var regex = regexes[x];
            if (regex != null && (regex.test(text) || regex.test(description))) {
                return x;
            }
        }
        return -1;
    } : null;
    
    for (var i = 0; i < bandIndices.length; i++) {
        var bandIndex = bandIndices[i];
        timeline.getBand(bandIndex).getEventPainter().setFilterMatcher(filterMatcher);
        timeline.getBand(bandIndex).getEventPainter().setHighlightMatcher(highlightMatcher);
    }
    timeline.paint();
}
function clearAll(timeline, bandIndices, table) {
    var tr = table.rows[1];
    for (var x = 0; x < tr.cells.length - 1; x++) {
        tr.cells[x].firstChild.value = "";
    }
    
    for (var i = 0; i < bandIndices.length; i++) {
        var bandIndex = bandIndices[i];
        timeline.getBand(bandIndex).getEventPainter().setFilterMatcher(null);
        timeline.getBand(bandIndex).getEventPainter().setHighlightMatcher(null);
    }
    timeline.paint();
}