/* globals jQuery */
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/**
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* ext-markers.js
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*
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* @license Apache-2.0
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*
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* @copyright 2010 Will Schleter based on ext-arrows.js by Copyright(c) 2010 Alexis Deveria
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*
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* This extension provides for the addition of markers to the either end
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* or the middle of a line, polyline, path, polygon.
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*
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* Markers may be either a graphic or arbitary text
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*
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* to simplify the coding and make the implementation as robust as possible,
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* markers are not shared - every object has its own set of markers.
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* this relationship is maintained by a naming convention between the
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* ids of the markers and the ids of the object
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*
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* The following restrictions exist for simplicty of use and programming
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* objects and their markers to have the same color
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* marker size is fixed
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* text marker font, size, and attributes are fixed
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* an application specific attribute - se_type - is added to each marker element
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* to store the type of marker
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*
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* @todo
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* remove some of the restrictions above
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* add option for keeping text aligned to horizontal
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* add support for dimension extension lines
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*
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*/
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export default {
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name: 'markers',
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async init (S) {
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const strings = await S.importLocale();
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const svgEditor = this;
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const $ = jQuery;
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const svgCanvas = svgEditor.canvas;
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const // {svgcontent} = S,
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addElem = svgCanvas.addSVGElementFromJson;
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const mtypes = ['start', 'mid', 'end'];
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const markerPrefix = 'se_marker_';
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const idPrefix = 'mkr_';
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// note - to add additional marker types add them below with a unique id
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// and add the associated icon(s) to marker-icons.svg
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// the geometry is normalized to a 100x100 box with the origin at lower left
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// Safari did not like negative values for low left of viewBox
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// remember that the coordinate system has +y downward
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const markerTypes = {
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nomarker: {},
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leftarrow:
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{element: 'path', attr: {d: 'M0,50 L100,90 L70,50 L100,10 Z'}},
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rightarrow:
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{element: 'path', attr: {d: 'M100,50 L0,90 L30,50 L0,10 Z'}},
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textmarker:
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{element: 'text', attr: {x: 0, y: 0, 'stroke-width': 0, stroke: 'none', 'font-size': 75, 'font-family': 'serif', 'text-anchor': 'left',
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'xml:space': 'preserve'}},
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forwardslash:
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{element: 'path', attr: {d: 'M30,100 L70,0'}},
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reverseslash:
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{element: 'path', attr: {d: 'M30,0 L70,100'}},
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verticalslash:
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{element: 'path', attr: {d: 'M50,0 L50,100'}},
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box:
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{element: 'path', attr: {d: 'M20,20 L20,80 L80,80 L80,20 Z'}},
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star:
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{element: 'path', attr: {d: 'M10,30 L90,30 L20,90 L50,10 L80,90 Z'}},
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xmark:
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{element: 'path', attr: {d: 'M20,80 L80,20 M80,80 L20,20'}},
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triangle:
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{element: 'path', attr: {d: 'M10,80 L50,20 L80,80 Z'}},
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mcircle:
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{element: 'circle', attr: {r: 30, cx: 50, cy: 50}}
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};
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// duplicate shapes to support unfilled (open) marker types with an _o suffix
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['leftarrow', 'rightarrow', 'box', 'star', 'mcircle', 'triangle'].forEach((v) => {
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markerTypes[v + '_o'] = markerTypes[v];
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});
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/**
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* @param {Element} elem - A graphic element will have an attribute like marker-start
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* @param {"marker-start"|"marker-mid"|"marker-end"} attr
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* @returns {Element} The marker element that is linked to the graphic element
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*/
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function getLinked (elem, attr) {
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const str = elem.getAttribute(attr);
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if (!str) { return null; }
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const 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 svgCanvas.getElem(m[1]);
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}
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function setIcon (pos, id) {
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if (id.substr(0, 1) !== '\\') { id = '\\textmarker'; }
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const ci = '#' + idPrefix + pos + '_' + id.substr(1);
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svgEditor.setIcon('#cur_' + pos + '_marker_list', $(ci).children());
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$(ci).addClass('current').siblings().removeClass('current');
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}
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let selElems;
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// toggles context tool panel off/on
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// sets the controls with the selected element's settings
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function showPanel (on) {
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$('#marker_panel').toggle(on);
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if (on) {
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const el = selElems[0];
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let val, ci;
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$.each(mtypes, function (i, pos) {
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const m = getLinked(el, 'marker-' + pos);
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const txtbox = $('#' + pos + '_marker');
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if (!m) {
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val = '\\nomarker';
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ci = val;
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txtbox.hide(); // hide text box
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} else {
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if (!m.attributes.se_type) { return; } // not created by this extension
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val = '\\' + m.attributes.se_type.textContent;
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ci = val;
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if (val === '\\textmarker') {
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val = m.lastChild.textContent;
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// txtbox.show(); // show text box
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} else {
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txtbox.hide(); // hide text box
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}
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}
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txtbox.val(val);
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setIcon(pos, ci);
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});
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}
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}
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function addMarker (id, val) {
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const txtBoxBg = '#ffffff';
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const txtBoxBorder = 'none';
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const txtBoxStrokeWidth = 0;
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let marker = svgCanvas.getElem(id);
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if (marker) { return; }
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if (val === '' || val === '\\nomarker') { return; }
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const el = selElems[0];
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const color = el.getAttribute('stroke');
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// NOTE: Safari didn't like a negative value in viewBox
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// so we use a standardized 0 0 100 100
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// with 50 50 being mapped to the marker position
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const strokeWidth = 10;
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let refX = 50;
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let refY = 50;
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let viewBox = '0 0 100 100';
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let markerWidth = 5;
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let markerHeight = 5;
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let seType;
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if (val.substr(0, 1) === '\\') {
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seType = val.substr(1);
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} else { seType = 'textmarker'; }
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if (!markerTypes[seType]) { return; } // an unknown type!
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// create a generic marker
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marker = addElem({
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element: 'marker',
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attr: {
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id,
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markerUnits: 'strokeWidth',
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orient: 'auto',
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style: 'pointer-events:none',
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se_type: seType
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}
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});
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if (seType !== 'textmarker') {
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const mel = addElem(markerTypes[seType]);
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const fillcolor = (seType.substr(-2) === '_o')
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? 'none'
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: color;
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mel.setAttribute('fill', fillcolor);
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mel.setAttribute('stroke', color);
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mel.setAttribute('stroke-width', strokeWidth);
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marker.append(mel);
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} else {
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const text = addElem(markerTypes[seType]);
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// have to add text to get bounding box
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text.textContent = val;
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const tb = text.getBBox();
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// alert(tb.x + ' ' + tb.y + ' ' + tb.width + ' ' + tb.height);
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const pad = 1;
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const bb = tb;
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bb.x = 0;
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bb.y = 0;
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bb.width += pad * 2;
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bb.height += pad * 2;
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// shift text according to its size
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text.setAttribute('x', pad);
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text.setAttribute('y', bb.height - pad - tb.height / 4); // kludge?
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text.setAttribute('fill', color);
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refX = bb.width / 2 + pad;
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refY = bb.height / 2 + pad;
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viewBox = bb.x + ' ' + bb.y + ' ' + bb.width + ' ' + bb.height;
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markerWidth = bb.width / 10;
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markerHeight = bb.height / 10;
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const box = addElem({
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element: 'rect',
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attr: {
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x: bb.x,
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y: bb.y,
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width: bb.width,
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height: bb.height,
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fill: txtBoxBg,
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stroke: txtBoxBorder,
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'stroke-width': txtBoxStrokeWidth
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}
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});
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marker.setAttribute('orient', 0);
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marker.append(box, text);
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}
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marker.setAttribute('viewBox', viewBox);
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marker.setAttribute('markerWidth', markerWidth);
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marker.setAttribute('markerHeight', markerHeight);
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marker.setAttribute('refX', refX);
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marker.setAttribute('refY', refY);
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svgCanvas.findDefs().append(marker);
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return marker;
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}
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function convertline (elem) {
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// this routine came from the connectors extension
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// it is needed because midpoint markers don't work with line elements
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if (!(elem.tagName === 'line')) { return elem; }
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// Convert to polyline to accept mid-arrow
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const x1 = Number(elem.getAttribute('x1'));
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const x2 = Number(elem.getAttribute('x2'));
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const y1 = Number(elem.getAttribute('y1'));
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const y2 = Number(elem.getAttribute('y2'));
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const {id} = elem;
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const midPt = (' ' + ((x1 + x2) / 2) + ',' + ((y1 + y2) / 2) + ' ');
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const pline = addElem({
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element: 'polyline',
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attr: {
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points: (x1 + ',' + y1 + midPt + x2 + ',' + y2),
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stroke: elem.getAttribute('stroke'),
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'stroke-width': elem.getAttribute('stroke-width'),
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fill: 'none',
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opacity: elem.getAttribute('opacity') || 1
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}
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});
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$.each(mtypes, function (i, pos) { // get any existing marker definitions
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const nam = 'marker-' + pos;
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const m = elem.getAttribute(nam);
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if (m) { pline.setAttribute(nam, elem.getAttribute(nam)); }
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});
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const batchCmd = new S.BatchCommand();
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batchCmd.addSubCommand(new S.RemoveElementCommand(elem, elem.parentNode));
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batchCmd.addSubCommand(new S.InsertElementCommand(pline));
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$(elem).after(pline).remove();
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svgCanvas.clearSelection();
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pline.id = id;
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svgCanvas.addToSelection([pline]);
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S.addCommandToHistory(batchCmd);
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return pline;
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}
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function setMarker () {
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const poslist = {start_marker: 'start', mid_marker: 'mid', end_marker: 'end'};
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const pos = poslist[this.id];
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const markerName = 'marker-' + pos;
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const el = selElems[0];
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const marker = getLinked(el, markerName);
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if (marker) { $(marker).remove(); }
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el.removeAttribute(markerName);
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let val = this.value;
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if (val === '') { val = '\\nomarker'; }
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if (val === '\\nomarker') {
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setIcon(pos, val);
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svgCanvas.call('changed', selElems);
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return;
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}
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// Set marker on element
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const id = markerPrefix + pos + '_' + el.id;
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addMarker(id, val);
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svgCanvas.changeSelectedAttribute(markerName, 'url(#' + id + ')');
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if (el.tagName === 'line' && pos === 'mid') {
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convertline(el);
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}
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svgCanvas.call('changed', selElems);
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setIcon(pos, val);
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}
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// called when the main system modifies an object
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// this routine changes the associated markers to be the same color
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function colorChanged (elem) {
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const color = elem.getAttribute('stroke');
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$.each(mtypes, function (i, pos) {
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const marker = getLinked(elem, 'marker-' + pos);
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if (!marker) { return; }
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if (!marker.attributes.se_type) { return; } // not created by this extension
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const ch = marker.lastElementChild;
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if (!ch) { return; }
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const curfill = ch.getAttribute('fill');
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const curstroke = ch.getAttribute('stroke');
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if (curfill && curfill !== 'none') { ch.setAttribute('fill', color); }
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if (curstroke && curstroke !== 'none') { ch.setAttribute('stroke', color); }
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});
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}
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// called when the main system creates or modifies an object
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// primary purpose is create new markers for cloned objects
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function updateReferences (el) {
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$.each(mtypes, function (i, pos) {
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const id = markerPrefix + pos + '_' + el.id;
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const markerName = 'marker-' + pos;
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const marker = getLinked(el, markerName);
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if (!marker || !marker.attributes.se_type) { return; } // not created by this extension
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const url = el.getAttribute(markerName);
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if (url) {
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const len = el.id.length;
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const linkid = url.substr(-len - 1, len);
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if (el.id !== linkid) {
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const val = $('#' + pos + '_marker').attr('value');
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addMarker(id, val);
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svgCanvas.changeSelectedAttribute(markerName, 'url(#' + id + ')');
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if (el.tagName === 'line' && pos === 'mid') { el = convertline(el); }
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svgCanvas.call('changed', selElems);
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}
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}
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});
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}
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// simulate a change event a text box that stores the current element's marker type
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function triggerTextEntry (pos, val) {
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$('#' + pos + '_marker').val(val);
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$('#' + pos + '_marker').change();
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// const txtbox = $('#'+pos+'_marker');
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// if (val.substr(0,1)=='\\') {txtbox.hide();}
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// else {txtbox.show();}
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}
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function showTextPrompt (pos) {
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let def = $('#' + pos + '_marker').val();
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if (def.substr(0, 1) === '\\') { def = ''; }
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$.prompt('Enter text for ' + pos + ' marker', def, function (txt) {
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if (txt) { triggerTextEntry(pos, txt); }
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});
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}
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/*
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function setMarkerSet(obj) {
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const parts = this.id.split('_');
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const set = parts[2];
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switch (set) {
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case 'off':
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triggerTextEntry('start','\\nomarker');
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triggerTextEntry('mid','\\nomarker');
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triggerTextEntry('end','\\nomarker');
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break;
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case 'dimension':
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triggerTextEntry('start','\\leftarrow');
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triggerTextEntry('end','\\rightarrow');
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showTextPrompt('mid');
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break;
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case 'label':
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triggerTextEntry('mid','\\nomarker');
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triggerTextEntry('end','\\rightarrow');
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showTextPrompt('start');
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break;
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}
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}
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*/
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// callback function for a toolbar button click
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function setArrowFromButton (obj) {
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const parts = this.id.split('_');
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const pos = parts[1];
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let val = parts[2];
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if (parts[3]) { val += '_' + parts[3]; }
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if (val !== 'textmarker') {
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triggerTextEntry(pos, '\\' + val);
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} else {
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showTextPrompt(pos);
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}
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}
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function getTitle (id) {
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const {langList} = strings;
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const item = langList.find((item) => {
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return item.id === id;
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});
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return item ? item.title : id;
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}
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// build the toolbar button array from the marker definitions
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function buildButtonList (lang) {
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const buttons = [];
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// const i = 0;
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/*
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buttons.push({
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id: idPrefix + 'markers_off',
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title: 'Turn off all markers',
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type: 'context',
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events: { click: setMarkerSet },
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panel: 'marker_panel'
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});
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buttons.push({
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id: idPrefix + 'markers_dimension',
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title: 'Dimension',
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type: 'context',
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events: { click: setMarkerSet },
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panel: 'marker_panel'
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});
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buttons.push({
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id: idPrefix + 'markers_label',
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title: 'Label',
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type: 'context',
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events: { click: setMarkerSet },
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panel: 'marker_panel'
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});
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*/
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$.each(mtypes, function (k, pos) {
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const listname = pos + '_marker_list';
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let def = true;
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Object.keys(markerTypes).forEach(function (id) {
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const title = getTitle(String(id));
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buttons.push({
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id: idPrefix + pos + '_' + id,
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svgicon: id,
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icon: svgEditor.curConfig.extIconsPath + 'markers-' + id + '.png',
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title,
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type: 'context',
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events: {click: setArrowFromButton},
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panel: 'marker_panel',
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list: listname,
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isDefault: def
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});
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def = false;
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});
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});
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return buttons;
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}
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const contextTools = [
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{
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type: 'input',
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panel: 'marker_panel',
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id: 'start_marker',
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size: 3,
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events: {change: setMarker}
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}, {
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type: 'button-select',
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panel: 'marker_panel',
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id: 'start_marker_list',
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colnum: 3,
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events: {change: setArrowFromButton}
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}, {
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type: 'input',
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panel: 'marker_panel',
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id: 'mid_marker',
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defval: '',
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size: 3,
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events: {change: setMarker}
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}, {
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type: 'button-select',
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panel: 'marker_panel',
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id: 'mid_marker_list',
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colnum: 3,
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events: {change: setArrowFromButton}
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}, {
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type: 'input',
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panel: 'marker_panel',
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id: 'end_marker',
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size: 3,
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events: {change: setMarker}
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}, {
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type: 'button-select',
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panel: 'marker_panel',
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id: 'end_marker_list',
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colnum: 3,
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events: {change: setArrowFromButton}
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}
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];
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return {
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name: strings.name,
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svgicons: svgEditor.curConfig.extIconsPath + 'markers-icons.xml',
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callback () {
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$('#marker_panel').addClass('toolset').hide();
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},
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async addLangData ({importLocale, lang}) {
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return {data: strings.langList};
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},
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selectedChanged (opts) {
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// Use this to update the current selected elements
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// console.log('selectChanged',opts);
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selElems = opts.elems;
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const markerElems = ['line', 'path', 'polyline', 'polygon'];
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let i = selElems.length;
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while (i--) {
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const elem = selElems[i];
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if (elem && markerElems.includes(elem.tagName)) {
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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 (opts) {
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// console.log('elementChanged',opts);
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const 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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colorChanged(elem);
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updateReferences(elem);
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}
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// changing_flag = false; // Not apparently in use
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},
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buttons: buildButtonList(),
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context_tools: strings.contextTools.map((contextTool, i) => {
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return Object.assign(contextTools[i], contextTool);
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})
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};
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}
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};
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