instiki/public/svg-edit/editor/extensions/ext-arrows.js

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