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Mini Shell
Mini Shell
/*globals $, svgroot */
/*jslint vars: true, eqeq: true, forin: true*/
/**
* Coords.
*
* Licensed under the MIT License
*
*/
// Dependencies:
// 1) jquery.js
// 2) math.js
// 3) pathseg.js
// 4) browser.js
// 5) svgutils.js
// 6) units.js
// 7) svgtransformlist.js
var svgedit = svgedit || {};
(function() {'use strict';
if (!svgedit.coords) {
svgedit.coords = {};
}
// this is how we map paths to our preferred relative segment types
var pathMap = [0, 'z', 'M', 'm', 'L', 'l', 'C', 'c', 'Q', 'q', 'A', 'a',
'H', 'h', 'V', 'v', 'S', 's', 'T', 't'];
/**
* @typedef editorContext
* @type {?object}
* @property {function} getGridSnapping
* @property {function} getDrawing
*/
var editorContext_ = null;
/**
* @param {editorContext} editorContext
*/
svgedit.coords.init = function(editorContext) {
editorContext_ = editorContext;
};
/**
* Applies coordinate changes to an element based on the given matrix
* @param {Element} selected - DOM element to be changed
* @param {object} changes - Object with changes to be remapped
* @param {SVGMatrix} m - Matrix object to use for remapping coordinates
*/
svgedit.coords.remapElement = function(selected, changes, m) {
var i, type,
remap = function(x, y) { return svgedit.math.transformPoint(x, y, m); },
scalew = function(w) { return m.a * w; },
scaleh = function(h) { return m.d * h; },
doSnapping = editorContext_.getGridSnapping() && selected.parentNode.parentNode.localName === 'svg',
finishUp = function() {
var o;
if (doSnapping) {
for (o in changes) {
changes[o] = svgedit.utilities.snapToGrid(changes[o]);
}
}
svgedit.utilities.assignAttributes(selected, changes, 1000, true);
},
box = svgedit.utilities.getBBox(selected);
for (i = 0; i < 2; i++) {
type = i === 0 ? 'fill' : 'stroke';
var attrVal = selected.getAttribute(type);
if (attrVal && attrVal.indexOf('url(') === 0) {
if (m.a < 0 || m.d < 0) {
var grad = svgedit.utilities.getRefElem(attrVal);
var newgrad = grad.cloneNode(true);
if (m.a < 0) {
// flip x
var x1 = newgrad.getAttribute('x1');
var x2 = newgrad.getAttribute('x2');
newgrad.setAttribute('x1', -(x1 - 1));
newgrad.setAttribute('x2', -(x2 - 1));
}
if (m.d < 0) {
// flip y
var y1 = newgrad.getAttribute('y1');
var y2 = newgrad.getAttribute('y2');
newgrad.setAttribute('y1', -(y1 - 1));
newgrad.setAttribute('y2', -(y2 - 1));
}
newgrad.id = editorContext_.getDrawing().getNextId();
svgedit.utilities.findDefs().appendChild(newgrad);
selected.setAttribute(type, 'url(#' + newgrad.id + ')');
}
// Not really working :(
// if (selected.tagName === 'path') {
// reorientGrads(selected, m);
// }
}
}
var elName = selected.tagName;
var chlist, mt;
if (elName === 'g' || elName === 'text' || elName == 'tspan' || elName === 'use') {
// if it was a translate, then just update x,y
if (m.a == 1 && m.b == 0 && m.c == 0 && m.d == 1 && (m.e != 0 || m.f != 0) ) {
// [T][M] = [M][T']
// therefore [T'] = [M_inv][T][M]
var existing = svgedit.math.transformListToTransform(selected).matrix,
t_new = svgedit.math.matrixMultiply(existing.inverse(), m, existing);
changes.x = parseFloat(changes.x) + t_new.e;
changes.y = parseFloat(changes.y) + t_new.f;
} else {
// we just absorb all matrices into the element and don't do any remapping
chlist = svgedit.transformlist.getTransformList(selected);
mt = svgroot.createSVGTransform();
mt.setMatrix(svgedit.math.matrixMultiply(svgedit.math.transformListToTransform(chlist).matrix, m));
chlist.clear();
chlist.appendItem(mt);
}
}
var c, pt, pt1, pt2, len;
// now we have a set of changes and an applied reduced transform list
// we apply the changes directly to the DOM
switch (elName) {
case 'foreignObject':
case 'rect':
case 'image':
// Allow images to be inverted (give them matrix when flipped)
if (elName === 'image' && (m.a < 0 || m.d < 0)) {
// Convert to matrix
chlist = svgedit.transformlist.getTransformList(selected);
mt = svgroot.createSVGTransform();
mt.setMatrix(svgedit.math.matrixMultiply(svgedit.math.transformListToTransform(chlist).matrix, m));
chlist.clear();
chlist.appendItem(mt);
} else {
pt1 = remap(changes.x, changes.y);
changes.width = scalew(changes.width);
changes.height = scaleh(changes.height);
changes.x = pt1.x + Math.min(0, changes.width);
changes.y = pt1.y + Math.min(0, changes.height);
changes.width = Math.abs(changes.width);
changes.height = Math.abs(changes.height);
}
finishUp();
break;
case 'ellipse':
c = remap(changes.cx, changes.cy);
changes.cx = c.x;
changes.cy = c.y;
changes.rx = scalew(changes.rx);
changes.ry = scaleh(changes.ry);
changes.rx = Math.abs(changes.rx);
changes.ry = Math.abs(changes.ry);
finishUp();
break;
case 'circle':
c = remap(changes.cx,changes.cy);
changes.cx = c.x;
changes.cy = c.y;
// take the minimum of the new selected box's dimensions for the new circle radius
var tbox = svgedit.math.transformBox(box.x, box.y, box.width, box.height, m);
var w = tbox.tr.x - tbox.tl.x, h = tbox.bl.y - tbox.tl.y;
changes.r = Math.min(w/2, h/2);
if (changes.r) {changes.r = Math.abs(changes.r);}
finishUp();
break;
case 'line':
pt1 = remap(changes.x1, changes.y1);
pt2 = remap(changes.x2, changes.y2);
changes.x1 = pt1.x;
changes.y1 = pt1.y;
changes.x2 = pt2.x;
changes.y2 = pt2.y;
// deliberately fall through here
case 'text':
case 'tspan':
case 'use':
finishUp();
break;
case 'g':
var gsvg = $(selected).data('gsvg');
if (gsvg) {
svgedit.utilities.assignAttributes(gsvg, changes, 1000, true);
}
break;
case 'polyline':
case 'polygon':
len = changes.points.length;
for (i = 0; i < len; ++i) {
pt = changes.points[i];
pt = remap(pt.x, pt.y);
changes.points[i].x = pt.x;
changes.points[i].y = pt.y;
}
len = changes.points.length;
var pstr = '';
for (i = 0; i < len; ++i) {
pt = changes.points[i];
pstr += pt.x + ',' + pt.y + ' ';
}
selected.setAttribute('points', pstr);
break;
case 'path':
var seg;
var segList = selected.pathSegList;
len = segList.numberOfItems;
changes.d = [];
for (i = 0; i < len; ++i) {
seg = segList.getItem(i);
changes.d[i] = {
type: seg.pathSegType,
x: seg.x,
y: seg.y,
x1: seg.x1,
y1: seg.y1,
x2: seg.x2,
y2: seg.y2,
r1: seg.r1,
r2: seg.r2,
angle: seg.angle,
largeArcFlag: seg.largeArcFlag,
sweepFlag: seg.sweepFlag
};
}
len = changes.d.length;
var firstseg = changes.d[0],
currentpt = remap(firstseg.x, firstseg.y);
changes.d[0].x = currentpt.x;
changes.d[0].y = currentpt.y;
for (i = 1; i < len; ++i) {
seg = changes.d[i];
type = seg.type;
// if absolute or first segment, we want to remap x, y, x1, y1, x2, y2
// if relative, we want to scalew, scaleh
if (type % 2 == 0) { // absolute
var thisx = (seg.x != undefined) ? seg.x : currentpt.x, // for V commands
thisy = (seg.y != undefined) ? seg.y : currentpt.y; // for H commands
pt = remap(thisx,thisy);
pt1 = remap(seg.x1, seg.y1);
pt2 = remap(seg.x2, seg.y2);
seg.x = pt.x;
seg.y = pt.y;
seg.x1 = pt1.x;
seg.y1 = pt1.y;
seg.x2 = pt2.x;
seg.y2 = pt2.y;
seg.r1 = scalew(seg.r1);
seg.r2 = scaleh(seg.r2);
}
else { // relative
seg.x = scalew(seg.x);
seg.y = scaleh(seg.y);
seg.x1 = scalew(seg.x1);
seg.y1 = scaleh(seg.y1);
seg.x2 = scalew(seg.x2);
seg.y2 = scaleh(seg.y2);
seg.r1 = scalew(seg.r1);
seg.r2 = scaleh(seg.r2);
}
} // for each segment
var dstr = '';
len = changes.d.length;
for (i = 0; i < len; ++i) {
seg = changes.d[i];
type = seg.type;
dstr += pathMap[type];
switch (type) {
case 13: // relative horizontal line (h)
case 12: // absolute horizontal line (H)
dstr += seg.x + ' ';
break;
case 15: // relative vertical line (v)
case 14: // absolute vertical line (V)
dstr += seg.y + ' ';
break;
case 3: // relative move (m)
case 5: // relative line (l)
case 19: // relative smooth quad (t)
case 2: // absolute move (M)
case 4: // absolute line (L)
case 18: // absolute smooth quad (T)
dstr += seg.x + ',' + seg.y + ' ';
break;
case 7: // relative cubic (c)
case 6: // absolute cubic (C)
dstr += seg.x1 + ',' + seg.y1 + ' ' + seg.x2 + ',' + seg.y2 + ' ' +
seg.x + ',' + seg.y + ' ';
break;
case 9: // relative quad (q)
case 8: // absolute quad (Q)
dstr += seg.x1 + ',' + seg.y1 + ' ' + seg.x + ',' + seg.y + ' ';
break;
case 11: // relative elliptical arc (a)
case 10: // absolute elliptical arc (A)
dstr += seg.r1 + ',' + seg.r2 + ' ' + seg.angle + ' ' + (+seg.largeArcFlag) +
' ' + (+seg.sweepFlag) + ' ' + seg.x + ',' + seg.y + ' ';
break;
case 17: // relative smooth cubic (s)
case 16: // absolute smooth cubic (S)
dstr += seg.x2 + ',' + seg.y2 + ' ' + seg.x + ',' + seg.y + ' ';
break;
}
}
selected.setAttribute('d', dstr);
break;
}
};
}());
Zerion Mini Shell 1.0