svgedit/dist/extensions/ext-markers.js

603 lines
20 KiB
JavaScript

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