/*
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* ext-arrows.js
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*
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* Licensed under the Apache License, Version 2
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*
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* Copyright(c) 2010 Alexis Deveria
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*
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*/
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methodDraw.addExtension("Arrows", function(S) {
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var svgcontent = S.svgcontent,
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addElem = S.addSvgElementFromJson,
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nonce = S.nonce,
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randomize_ids = S.randomize_ids,
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selElems;
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svgCanvas.bind('setnonce', setArrowNonce);
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svgCanvas.bind('unsetnonce', unsetArrowNonce);
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var lang_list = {
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"en":[
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{"id": "arrow_none", "textContent": "No arrow" }
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],
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"fr":[
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{"id": "arrow_none", "textContent": "Sans flèche" }
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]
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};
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var prefix = 'se_arrow_';
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if (randomize_ids) {
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var arrowprefix = prefix + nonce + '_';
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} else {
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var arrowprefix = prefix;
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}
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var pathdata = {
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fw: {d:"m0,0l10,5l-10,5l5,-5l-5,-5z", refx:8, id: arrowprefix + 'fw'},
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bk: {d:"m10,0l-10,5l10,5l-5,-5l5,-5z", refx:2, id: arrowprefix + 'bk'}
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}
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function setArrowNonce(window, n) {
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randomize_ids = true;
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arrowprefix = prefix + n + '_';
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pathdata.fw.id = arrowprefix + 'fw';
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pathdata.bk.id = arrowprefix + 'bk';
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}
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function unsetArrowNonce(window) {
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randomize_ids = false;
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arrowprefix = prefix;
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pathdata.fw.id = arrowprefix + 'fw';
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pathdata.bk.id = arrowprefix + 'bk';
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}
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function getLinked(elem, attr) {
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var str = elem.getAttribute(attr);
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if(!str) return null;
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var m = str.match(/\(\#(.*)\)/);
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if(!m || m.length !== 2) {
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return null;
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}
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return S.getElem(m[1]);
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}
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function showPanel(on) {
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$('#arrow_panel').toggle(on);
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if(on) {
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var el = selElems[0];
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var end = el.getAttribute("marker-end");
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var start = el.getAttribute("marker-start");
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var mid = el.getAttribute("marker-mid");
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var val;
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if(end && start) {
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val = "both";
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} else if(end) {
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val = "end";
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} else if(start) {
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val = "start";
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} else if(mid) {
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val = "mid";
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if(mid.indexOf("bk") != -1) {
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val = "mid_bk";
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}
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}
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if(!start && !mid && !end) {
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val = "none";
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}
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$("#arrow_list").val(val);
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}
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}
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function resetMarker() {
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var el = selElems[0];
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el.removeAttribute("marker-start");
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el.removeAttribute("marker-mid");
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el.removeAttribute("marker-end");
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}
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function addMarker(dir, type, id) {
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// TODO: Make marker (or use?) per arrow type, since refX can be different
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id = id || arrowprefix + dir;
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var marker = S.getElem(id);
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var data = pathdata[dir];
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if(type == "mid") {
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data.refx = 5;
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}
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if(!marker) {
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marker = addElem({
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"element": "marker",
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"attr": {
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"viewBox": "0 0 10 10",
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"id": id,
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"refY": 5,
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"markerUnits": "strokeWidth",
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"markerWidth": 5,
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"markerHeight": 5,
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"orient": "auto",
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"style": "pointer-events:none" // Currently needed for Opera
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}
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});
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var arrow = addElem({
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"element": "path",
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"attr": {
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"d": data.d,
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"fill": "#000000"
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}
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});
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marker.appendChild(arrow);
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S.findDefs().appendChild(marker);
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}
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marker.setAttribute('refX', data.refx);
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return marker;
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}
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function setArrow() {
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var type = this.value;
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resetMarker();
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if(type == "none") {
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return;
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}
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// Set marker on element
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var dir = "fw";
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if(type == "mid_bk") {
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type = "mid";
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dir = "bk";
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} else if(type == "both") {
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addMarker("bk", type);
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svgCanvas.changeSelectedAttribute("marker-start", "url(#" + pathdata.bk.id + ")");
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type = "end";
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dir = "fw";
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} else if (type == "start") {
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dir = "bk";
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}
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addMarker(dir, type);
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svgCanvas.changeSelectedAttribute("marker-"+type, "url(#" + pathdata[dir].id + ")");
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S.call("changed", selElems);
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}
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function colorChanged(elem) {
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var color = elem.getAttribute('stroke');
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var mtypes = ['start','mid','end'];
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var defs = S.findDefs();
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$.each(mtypes, function(i, type) {
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var marker = getLinked(elem, 'marker-'+type);
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if(!marker) return;
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var cur_color = $(marker).children().attr('fill');
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var cur_d = $(marker).children().attr('d');
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var new_marker = null;
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if(cur_color === color) return;
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var all_markers = $(defs).find('marker');
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// Different color, check if already made
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all_markers.each(function() {
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var attrs = $(this).children().attr(['fill', 'd']);
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if(attrs.fill === color && attrs.d === cur_d) {
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// Found another marker with this color and this path
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new_marker = this;
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}
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});
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if(!new_marker) {
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// Create a new marker with this color
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var last_id = marker.id;
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var dir = last_id.indexOf('_fw') !== -1?'fw':'bk';
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new_marker = addMarker(dir, type, arrowprefix + dir + all_markers.length);
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$(new_marker).children().attr('fill', color);
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}
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$(elem).attr('marker-'+type, "url(#" + new_marker.id + ")");
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// Check if last marker can be removed
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var remove = true;
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$(S.svgcontent).find('line, polyline, path, polygon').each(function() {
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var elem = this;
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$.each(mtypes, function(j, mtype) {
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if($(elem).attr('marker-' + mtype) === "url(#" + marker.id + ")") {
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return remove = false;
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}
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});
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if(!remove) return false;
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});
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// Not found, so can safely remove
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if(remove) {
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$(marker).remove();
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}
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});
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}
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return {
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name: "Arrows",
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context_tools: [{
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type: "select",
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panel: "arrow_panel",
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title: "Select arrow type",
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id: "arrow_list",
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options: {
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none: "No arrow",
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end: "---->",
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start: "<----",
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both: "<--->",
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mid: "-->--",
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mid_bk: "--<--"
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},
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defval: "none",
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events: {
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change: setArrow
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}
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}],
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callback: function() {
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$('#arrow_panel').hide();
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// Set ID so it can be translated in locale file
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$('#arrow_list option')[0].id = 'connector_no_arrow';
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},
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addLangData: function(lang) {
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return {
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data: lang_list[lang]
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};
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},
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selectedChanged: function(opts) {
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// Use this to update the current selected elements
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selElems = opts.elems;
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var i = selElems.length;
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var marker_elems = ['line','path','polyline','polygon'];
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while(i--) {
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var elem = selElems[i];
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if(elem && $.inArray(elem.tagName, marker_elems) != -1) {
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if(opts.selectedElement && !opts.multiselected) {
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showPanel(true);
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} else {
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showPanel(false);
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}
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} else {
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showPanel(false);
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}
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}
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},
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elementChanged: function(opts) {
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var elem = opts.elems[0];
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if(elem && (
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elem.getAttribute("marker-start") ||
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elem.getAttribute("marker-mid") ||
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elem.getAttribute("marker-end")
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)) {
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// var start = elem.getAttribute("marker-start");
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// var mid = elem.getAttribute("marker-mid");
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// var end = elem.getAttribute("marker-end");
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// Has marker, so see if it should match color
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colorChanged(elem);
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}
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}
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};
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});
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