svgedit/editor/recalculate.js

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/**
* Recalculate.
*
* Licensed under the MIT License
*
*/
// Dependencies:
// 1) jquery
// 2) jquery-svg.js
// 3) svgedit.js
// 4) browser.js
// 5) math.js
// 6) history.js
// 7) units.js
// 8) svgtransformlist.js
// 9) svgutils.js
// 10) coords.js
var svgedit = svgedit || {};
(function() {
if (!svgedit.recalculate) {
svgedit.recalculate = {};
}
var NS = svgedit.NS;
var context_;
// Function: svgedit.recalculate.init
svgedit.recalculate.init = function(editorContext) {
context_ = editorContext;
};
// Function: svgedit.recalculate.updateClipPath
// Updates a <clipPath>s values based on the given translation of an element
//
// Parameters:
// attr - The clip-path attribute value with the clipPath's ID
// tx - The translation's x value
// ty - The translation's y value
svgedit.recalculate.updateClipPath = function(attr, tx, ty) {
var path = getRefElem(attr).firstChild;
var cp_xform = svgedit.transformlist.getTransformList(path);
var newxlate = context_.getSVGRoot().createSVGTransform();
newxlate.setTranslate(tx, ty);
cp_xform.appendItem(newxlate);
// Update clipPath's dimensions
svgedit.recalculate.recalculateDimensions(path);
};
// Function: svgedit.recalculate.recalculateDimensions
// Decides the course of action based on the element's transform list
//
// Parameters:
// selected - The DOM element to recalculate
//
// Returns:
// Undo command object with the resulting change
svgedit.recalculate.recalculateDimensions = function(selected) {
if (selected == null) return null;
var svgroot = context_.getSVGRoot();
var tlist = svgedit.transformlist.getTransformList(selected);
// remove any unnecessary transforms
if (tlist && tlist.numberOfItems > 0) {
var k = tlist.numberOfItems;
while (k--) {
var xform = tlist.getItem(k);
if (xform.type === 0) {
tlist.removeItem(k);
}
// remove identity matrices
else if (xform.type === 1) {
if (svgedit.math.isIdentity(xform.matrix)) {
tlist.removeItem(k);
}
}
// remove zero-degree rotations
else if (xform.type === 4) {
if (xform.angle === 0) {
tlist.removeItem(k);
}
}
}
// End here if all it has is a rotation
if (tlist.numberOfItems === 1 &&
svgedit.utilities.getRotationAngle(selected)) return null;
}
// if this element had no transforms, we are done
if (!tlist || tlist.numberOfItems == 0) {
// Chrome has a bug that requires clearing the attribute first.
selected.setAttribute('transform', '');
selected.removeAttribute('transform');
return null;
}
// TODO: Make this work for more than 2
if (tlist) {
var k = tlist.numberOfItems;
var mxs = [];
while (k--) {
var xform = tlist.getItem(k);
if (xform.type === 1) {
mxs.push([xform.matrix, k]);
} else if (mxs.length) {
mxs = [];
}
}
if (mxs.length === 2) {
var m_new = svgroot.createSVGTransformFromMatrix(svgedit.math.matrixMultiply(mxs[1][0], mxs[0][0]));
tlist.removeItem(mxs[0][1]);
tlist.removeItem(mxs[1][1]);
tlist.insertItemBefore(m_new, mxs[1][1]);
}
// combine matrix + translate
k = tlist.numberOfItems;
if (k >= 2 && tlist.getItem(k-2).type === 1 && tlist.getItem(k-1).type === 2) {
var mt = svgroot.createSVGTransform();
var m = svgedit.math.matrixMultiply(
tlist.getItem(k-2).matrix,
tlist.getItem(k-1).matrix);
mt.setMatrix(m);
tlist.removeItem(k-2);
tlist.removeItem(k-2);
tlist.appendItem(mt);
}
}
// If it still has a single [M] or [R][M], return null too (prevents BatchCommand from being returned).
switch ( selected.tagName ) {
// Ignore these elements, as they can absorb the [M]
case 'line':
case 'polyline':
case 'polygon':
case 'path':
break;
default:
if ((tlist.numberOfItems === 1 && tlist.getItem(0).type === 1) ||
(tlist.numberOfItems === 2 && tlist.getItem(0).type === 1 && tlist.getItem(0).type === 4)) {
return null;
}
}
// Grouped SVG element
var gsvg = $(selected).data('gsvg');
// we know we have some transforms, so set up return variable
var batchCmd = new svgedit.history.BatchCommand('Transform');
// store initial values that will be affected by reducing the transform list
var changes = {}, initial = null, attrs = [];
switch (selected.tagName) {
case 'line':
attrs = ['x1', 'y1', 'x2', 'y2'];
break;
case 'circle':
attrs = ['cx', 'cy', 'r'];
break;
case 'ellipse':
attrs = ['cx', 'cy', 'rx', 'ry'];
break;
case 'foreignObject':
case 'rect':
case 'image':
attrs = ['width', 'height', 'x', 'y'];
break;
case 'use':
case 'text':
case 'tspan':
attrs = ['x', 'y'];
break;
case 'polygon':
case 'polyline':
initial = {};
initial['points'] = selected.getAttribute('points');
var list = selected.points;
var len = list.numberOfItems;
changes['points'] = new Array(len);
for (var i = 0; i < len; ++i) {
var pt = list.getItem(i);
changes['points'][i] = {x:pt.x, y:pt.y};
}
break;
case 'path':
initial = {};
initial['d'] = selected.getAttribute('d');
changes['d'] = selected.getAttribute('d');
break;
} // switch on element type to get initial values
if (attrs.length) {
changes = $(selected).attr(attrs);
$.each(changes, function(attr, val) {
changes[attr] = svgedit.units.convertToNum(attr, val);
});
} else if (gsvg) {
// GSVG exception
changes = {
x: $(gsvg).attr('x') || 0,
y: $(gsvg).attr('y') || 0
};
}
// if we haven't created an initial array in polygon/polyline/path, then
// make a copy of initial values and include the transform
if (initial == null) {
initial = $.extend(true, {}, changes);
$.each(initial, function(attr, val) {
initial[attr] = svgedit.units.convertToNum(attr, val);
});
}
// save the start transform value too
initial.transform = context_.getStartTransform() || '';
// if it's a regular group, we have special processing to flatten transforms
if ((selected.tagName == 'g' && !gsvg) || selected.tagName == 'a') {
var box = svgedit.utilities.getBBox(selected),
oldcenter = {x: box.x+box.width/2, y: box.y+box.height/2},
newcenter = svgedit.math.transformPoint(box.x+box.width/2,
box.y+box.height/2,
svgedit.math.transformListToTransform(tlist).matrix),
m = svgroot.createSVGMatrix();
// temporarily strip off the rotate and save the old center
var gangle = svgedit.utilities.getRotationAngle(selected);
if (gangle) {
var a = gangle * Math.PI / 180;
if ( Math.abs(a) > (1.0e-10) ) {
var s = Math.sin(a)/(1 - Math.cos(a));
} else {
// FIXME: This blows up if the angle is exactly 0!
var s = 2/a;
}
for (var i = 0; i < tlist.numberOfItems; ++i) {
var xform = tlist.getItem(i);
if (xform.type == 4) {
// extract old center through mystical arts
var rm = xform.matrix;
oldcenter.y = (s*rm.e + rm.f)/2;
oldcenter.x = (rm.e - s*rm.f)/2;
tlist.removeItem(i);
break;
}
}
}
var tx = 0, ty = 0,
operation = 0,
N = tlist.numberOfItems;
if (N) {
var first_m = tlist.getItem(0).matrix;
}
// first, if it was a scale then the second-last transform will be it
if (N >= 3 && tlist.getItem(N-2).type == 3 &&
tlist.getItem(N-3).type == 2 && tlist.getItem(N-1).type == 2)
{
operation = 3; // scale
// if the children are unrotated, pass the scale down directly
// otherwise pass the equivalent matrix() down directly
var tm = tlist.getItem(N-3).matrix,
sm = tlist.getItem(N-2).matrix,
tmn = tlist.getItem(N-1).matrix;
var children = selected.childNodes;
var c = children.length;
while (c--) {
var child = children.item(c);
tx = 0;
ty = 0;
if (child.nodeType == 1) {
var childTlist = svgedit.transformlist.getTransformList(child);
// some children might not have a transform (<metadata>, <defs>, etc)
if (!childTlist) continue;
var m = svgedit.math.transformListToTransform(childTlist).matrix;
// Convert a matrix to a scale if applicable
// if (svgedit.math.hasMatrixTransform(childTlist) && childTlist.numberOfItems == 1) {
// if (m.b==0 && m.c==0 && m.e==0 && m.f==0) {
// childTlist.removeItem(0);
// var translateOrigin = svgroot.createSVGTransform(),
// scale = svgroot.createSVGTransform(),
// translateBack = svgroot.createSVGTransform();
// translateOrigin.setTranslate(0, 0);
// scale.setScale(m.a, m.d);
// translateBack.setTranslate(0, 0);
// childTlist.appendItem(translateBack);
// childTlist.appendItem(scale);
// childTlist.appendItem(translateOrigin);
// }
// }
var angle = svgedit.utilities.getRotationAngle(child);
var oldStartTransform = context_.getStartTransform();
var childxforms = [];
context_.setStartTransform(child.getAttribute('transform'));
if (angle || svgedit.math.hasMatrixTransform(childTlist)) {
var e2t = svgroot.createSVGTransform();
e2t.setMatrix(svgedit.math.matrixMultiply(tm, sm, tmn, m));
childTlist.clear();
childTlist.appendItem(e2t);
childxforms.push(e2t);
}
// if not rotated or skewed, push the [T][S][-T] down to the child
else {
// update the transform list with translate,scale,translate
// slide the [T][S][-T] from the front to the back
// [T][S][-T][M] = [M][T2][S2][-T2]
// (only bringing [-T] to the right of [M])
// [T][S][-T][M] = [T][S][M][-T2]
// [-T2] = [M_inv][-T][M]
var t2n = svgedit.math.matrixMultiply(m.inverse(), tmn, m);
// [T2] is always negative translation of [-T2]
var t2 = svgroot.createSVGMatrix();
t2.e = -t2n.e;
t2.f = -t2n.f;
// [T][S][-T][M] = [M][T2][S2][-T2]
// [S2] = [T2_inv][M_inv][T][S][-T][M][-T2_inv]
var s2 = svgedit.math.matrixMultiply(t2.inverse(), m.inverse(), tm, sm, tmn, m, t2n.inverse());
var translateOrigin = svgroot.createSVGTransform(),
scale = svgroot.createSVGTransform(),
translateBack = svgroot.createSVGTransform();
translateOrigin.setTranslate(t2n.e, t2n.f);
scale.setScale(s2.a, s2.d);
translateBack.setTranslate(t2.e, t2.f);
childTlist.appendItem(translateBack);
childTlist.appendItem(scale);
childTlist.appendItem(translateOrigin);
childxforms.push(translateBack);
childxforms.push(scale);
childxforms.push(translateOrigin);
// logMatrix(translateBack.matrix);
// logMatrix(scale.matrix);
} // not rotated
batchCmd.addSubCommand( svgedit.recalculate.recalculateDimensions(child) );
// TODO: If any <use> have this group as a parent and are
// referencing this child, then we need to impose a reverse
// scale on it so that when it won't get double-translated
// var uses = selected.getElementsByTagNameNS(NS.SVG, 'use');
// var href = '#' + child.id;
// var u = uses.length;
// while (u--) {
// var useElem = uses.item(u);
// if (href == svgedit.utilities.getHref(useElem)) {
// var usexlate = svgroot.createSVGTransform();
// usexlate.setTranslate(-tx,-ty);
// svgedit.transformlist.getTransformList(useElem).insertItemBefore(usexlate,0);
// batchCmd.addSubCommand( svgedit.recalculate.recalculateDimensions(useElem) );
// }
// }
context_.setStartTransform(oldStartTransform);
} // element
} // for each child
// Remove these transforms from group
tlist.removeItem(N-1);
tlist.removeItem(N-2);
tlist.removeItem(N-3);
} else if (N >= 3 && tlist.getItem(N-1).type == 1) {
operation = 3; // scale
m = svgedit.math.transformListToTransform(tlist).matrix;
var e2t = svgroot.createSVGTransform();
e2t.setMatrix(m);
tlist.clear();
tlist.appendItem(e2t);
}
// next, check if the first transform was a translate
// if we had [ T1 ] [ M ] we want to transform this into [ M ] [ T2 ]
// therefore [ T2 ] = [ M_inv ] [ T1 ] [ M ]
else if ( (N == 1 || (N > 1 && tlist.getItem(1).type != 3)) &&
tlist.getItem(0).type == 2)
{
operation = 2; // translate
var T_M = svgedit.math.transformListToTransform(tlist).matrix;
tlist.removeItem(0);
var M_inv = svgedit.math.transformListToTransform(tlist).matrix.inverse();
var M2 = svgedit.math.matrixMultiply( M_inv, T_M );
tx = M2.e;
ty = M2.f;
if (tx != 0 || ty != 0) {
// we pass the translates down to the individual children
var children = selected.childNodes;
var c = children.length;
var clipPaths_done = [];
while (c--) {
var child = children.item(c);
if (child.nodeType == 1) {
// Check if child has clip-path
if (child.getAttribute('clip-path')) {
// tx, ty
var attr = child.getAttribute('clip-path');
if (clipPaths_done.indexOf(attr) === -1) {
svgedit.recalculate.updateClipPath(attr, tx, ty);
clipPaths_done.push(attr);
}
}
var oldStartTransform = context_.getStartTransform();
context_.setStartTransform(child.getAttribute('transform'));
var childTlist = svgedit.transformlist.getTransformList(child);
// some children might not have a transform (<metadata>, <defs>, etc)
if (childTlist) {
var newxlate = svgroot.createSVGTransform();
newxlate.setTranslate(tx, ty);
if (childTlist.numberOfItems) {
childTlist.insertItemBefore(newxlate, 0);
} else {
childTlist.appendItem(newxlate);
}
batchCmd.addSubCommand(svgedit.recalculate.recalculateDimensions(child));
// If any <use> have this group as a parent and are
// referencing this child, then impose a reverse translate on it
// so that when it won't get double-translated
var uses = selected.getElementsByTagNameNS(NS.SVG, 'use');
var href = '#' + child.id;
var u = uses.length;
while (u--) {
var useElem = uses.item(u);
if (href == svgedit.utilities.getHref(useElem)) {
var usexlate = svgroot.createSVGTransform();
usexlate.setTranslate(-tx,-ty);
svgedit.transformlist.getTransformList(useElem).insertItemBefore(usexlate, 0);
batchCmd.addSubCommand( svgedit.recalculate.recalculateDimensions(useElem) );
}
}
context_.setStartTransform(oldStartTransform);
}
}
}
clipPaths_done = [];
context_.setStartTransform(oldStartTransform);
}
}
// else, a matrix imposition from a parent group
// keep pushing it down to the children
else if (N == 1 && tlist.getItem(0).type == 1 && !gangle) {
operation = 1;
var m = tlist.getItem(0).matrix,
children = selected.childNodes,
c = children.length;
while (c--) {
var child = children.item(c);
if (child.nodeType == 1) {
var oldStartTransform = context_.getStartTransform();
context_.setStartTransform(child.getAttribute('transform'));
var childTlist = svgedit.transformlist.getTransformList(child);
if (!childTlist) continue;
var em = svgedit.math.matrixMultiply(m, svgedit.math.transformListToTransform(childTlist).matrix);
var e2m = svgroot.createSVGTransform();
e2m.setMatrix(em);
childTlist.clear();
childTlist.appendItem(e2m, 0);
batchCmd.addSubCommand( svgedit.recalculate.recalculateDimensions(child) );
context_.setStartTransform(oldStartTransform);
// Convert stroke
// TODO: Find out if this should actually happen somewhere else
var sw = child.getAttribute('stroke-width');
if (child.getAttribute('stroke') !== 'none' && !isNaN(sw)) {
var avg = (Math.abs(em.a) + Math.abs(em.d)) / 2;
child.setAttribute('stroke-width', sw * avg);
}
}
}
tlist.clear();
}
// else it was just a rotate
else {
if (gangle) {
var newRot = svgroot.createSVGTransform();
newRot.setRotate(gangle, newcenter.x, newcenter.y);
if (tlist.numberOfItems) {
tlist.insertItemBefore(newRot, 0);
} else {
tlist.appendItem(newRot);
}
}
if (tlist.numberOfItems == 0) {
selected.removeAttribute('transform');
}
return null;
}
// if it was a translate, put back the rotate at the new center
if (operation == 2) {
if (gangle) {
newcenter = {
x: oldcenter.x + first_m.e,
y: oldcenter.y + first_m.f
};
var newRot = svgroot.createSVGTransform();
newRot.setRotate(gangle, newcenter.x, newcenter.y);
if (tlist.numberOfItems) {
tlist.insertItemBefore(newRot, 0);
} else {
tlist.appendItem(newRot);
}
}
}
// if it was a resize
else if (operation == 3) {
var m = svgedit.math.transformListToTransform(tlist).matrix;
var roldt = svgroot.createSVGTransform();
roldt.setRotate(gangle, oldcenter.x, oldcenter.y);
var rold = roldt.matrix;
var rnew = svgroot.createSVGTransform();
rnew.setRotate(gangle, newcenter.x, newcenter.y);
var rnew_inv = rnew.matrix.inverse(),
m_inv = m.inverse(),
extrat = svgedit.math.matrixMultiply(m_inv, rnew_inv, rold, m);
tx = extrat.e;
ty = extrat.f;
if (tx != 0 || ty != 0) {
// now push this transform down to the children
// we pass the translates down to the individual children
var children = selected.childNodes;
var c = children.length;
while (c--) {
var child = children.item(c);
if (child.nodeType == 1) {
var oldStartTransform = context_.getStartTransform();
context_.setStartTransform(child.getAttribute('transform'));
var childTlist = svgedit.transformlist.getTransformList(child);
var newxlate = svgroot.createSVGTransform();
newxlate.setTranslate(tx, ty);
if (childTlist.numberOfItems) {
childTlist.insertItemBefore(newxlate, 0);
} else {
childTlist.appendItem(newxlate);
}
batchCmd.addSubCommand( svgedit.recalculate.recalculateDimensions(child) );
context_.setStartTransform(oldStartTransform);
}
}
}
if (gangle) {
if (tlist.numberOfItems) {
tlist.insertItemBefore(rnew, 0);
} else {
tlist.appendItem(rnew);
}
}
}
}
// else, it's a non-group
else {
// FIXME: box might be null for some elements (<metadata> etc), need to handle this
var box = svgedit.utilities.getBBox(selected);
// Paths (and possbly other shapes) will have no BBox while still in <defs>,
// but we still may need to recalculate them (see issue 595).
// TODO: Figure out how to get BBox from these elements in case they
// have a rotation transform
if (!box && selected.tagName != 'path') return null;
var m = svgroot.createSVGMatrix(),
// temporarily strip off the rotate and save the old center
angle = svgedit.utilities.getRotationAngle(selected);
if (angle) {
var oldcenter = {x: box.x+box.width/2, y: box.y+box.height/2},
newcenter = svgedit.math.transformPoint(box.x+box.width/2, box.y+box.height/2,
svgedit.math.transformListToTransform(tlist).matrix);
var a = angle * Math.PI / 180;
if ( Math.abs(a) > (1.0e-10) ) {
var s = Math.sin(a)/(1 - Math.cos(a));
} else {
// FIXME: This blows up if the angle is exactly 0!
var s = 2/a;
}
for (var i = 0; i < tlist.numberOfItems; ++i) {
var xform = tlist.getItem(i);
if (xform.type == 4) {
// extract old center through mystical arts
var rm = xform.matrix;
oldcenter.y = (s*rm.e + rm.f)/2;
oldcenter.x = (rm.e - s*rm.f)/2;
tlist.removeItem(i);
break;
}
}
}
// 2 = translate, 3 = scale, 4 = rotate, 1 = matrix imposition
var operation = 0;
var N = tlist.numberOfItems;
// Check if it has a gradient with userSpaceOnUse, in which case
// adjust it by recalculating the matrix transform.
// TODO: Make this work in Webkit using svgedit.transformlist.SVGTransformList
if (!svgedit.browser.isWebkit()) {
var fill = selected.getAttribute('fill');
if (fill && fill.indexOf('url(') === 0) {
var paint = getRefElem(fill);
var type = 'pattern';
if (paint.tagName !== type) type = 'gradient';
var attrVal = paint.getAttribute(type + 'Units');
if (attrVal === 'userSpaceOnUse') {
//Update the userSpaceOnUse element
m = svgedit.math.transformListToTransform(tlist).matrix;
var gtlist = svgedit.transformlist.getTransformList(paint);
var gmatrix = svgedit.math.transformListToTransform(gtlist).matrix;
m = svgedit.math.matrixMultiply(m, gmatrix);
var m_str = 'matrix(' + [m.a, m.b, m.c, m.d, m.e, m.f].join(',') + ')';
paint.setAttribute(type + 'Transform', m_str);
}
}
}
// first, if it was a scale of a non-skewed element, then the second-last
// transform will be the [S]
// if we had [M][T][S][T] we want to extract the matrix equivalent of
// [T][S][T] and push it down to the element
if (N >= 3 && tlist.getItem(N-2).type == 3 &&
tlist.getItem(N-3).type == 2 && tlist.getItem(N-1).type == 2)
// Removed this so a <use> with a given [T][S][T] would convert to a matrix.
// Is that bad?
// && selected.nodeName != 'use'
{
operation = 3; // scale
m = svgedit.math.transformListToTransform(tlist, N-3, N-1).matrix;
tlist.removeItem(N-1);
tlist.removeItem(N-2);
tlist.removeItem(N-3);
} // if we had [T][S][-T][M], then this was a skewed element being resized
// Thus, we simply combine it all into one matrix
else if (N == 4 && tlist.getItem(N-1).type == 1) {
operation = 3; // scale
m = svgedit.math.transformListToTransform(tlist).matrix;
var e2t = svgroot.createSVGTransform();
e2t.setMatrix(m);
tlist.clear();
tlist.appendItem(e2t);
// reset the matrix so that the element is not re-mapped
m = svgroot.createSVGMatrix();
} // if we had [R][T][S][-T][M], then this was a rotated matrix-element
// if we had [T1][M] we want to transform this into [M][T2]
// therefore [ T2 ] = [ M_inv ] [ T1 ] [ M ] and we can push [T2]
// down to the element
else if ( (N == 1 || (N > 1 && tlist.getItem(1).type != 3)) &&
tlist.getItem(0).type == 2)
{
operation = 2; // translate
var oldxlate = tlist.getItem(0).matrix,
meq = svgedit.math.transformListToTransform(tlist,1).matrix,
meq_inv = meq.inverse();
m = svgedit.math.matrixMultiply( meq_inv, oldxlate, meq );
tlist.removeItem(0);
}
// else if this child now has a matrix imposition (from a parent group)
// we might be able to simplify
else if (N == 1 && tlist.getItem(0).type == 1 && !angle) {
// Remap all point-based elements
m = svgedit.math.transformListToTransform(tlist).matrix;
switch (selected.tagName) {
case 'line':
changes = $(selected).attr(['x1', 'y1', 'x2', 'y2']);
case 'polyline':
case 'polygon':
changes.points = selected.getAttribute('points');
if (changes.points) {
var list = selected.points;
var len = list.numberOfItems;
changes.points = new Array(len);
for (var i = 0; i < len; ++i) {
var pt = list.getItem(i);
changes.points[i] = {x:pt.x, y:pt.y};
}
}
case 'path':
changes.d = selected.getAttribute('d');
operation = 1;
tlist.clear();
break;
default:
break;
}
}
// if it was a rotation, put the rotate back and return without a command
// (this function has zero work to do for a rotate())
else {
operation = 4; // rotation
if (angle) {
var newRot = svgroot.createSVGTransform();
newRot.setRotate(angle, newcenter.x, newcenter.y);
if (tlist.numberOfItems) {
tlist.insertItemBefore(newRot, 0);
} else {
tlist.appendItem(newRot);
}
}
if (tlist.numberOfItems == 0) {
selected.removeAttribute('transform');
}
return null;
}
// if it was a translate or resize, we need to remap the element and absorb the xform
if (operation == 1 || operation == 2 || operation == 3) {
svgedit.coords.remapElement(selected, changes, m);
} // if we are remapping
// if it was a translate, put back the rotate at the new center
if (operation == 2) {
if (angle) {
if (!svgedit.math.hasMatrixTransform(tlist)) {
newcenter = {
x: oldcenter.x + m.e,
y: oldcenter.y + m.f
};
}
var newRot = svgroot.createSVGTransform();
newRot.setRotate(angle, newcenter.x, newcenter.y);
if (tlist.numberOfItems) {
tlist.insertItemBefore(newRot, 0);
} else {
tlist.appendItem(newRot);
}
}
// We have special processing for tspans: Tspans are not transformable
// but they can have x,y coordinates (sigh). Thus, if this was a translate,
// on a text element, also translate any tspan children.
if (selected.tagName == 'text') {
var children = selected.childNodes;
var c = children.length;
while (c--) {
var child = children.item(c);
if (child.tagName == 'tspan') {
var tspanChanges = {
x: $(child).attr('x') || 0,
y: $(child).attr('y') || 0
};
svgedit.coords.remapElement(child, tspanChanges, m);
}
}
}
}
// [Rold][M][T][S][-T] became [Rold][M]
// we want it to be [Rnew][M][Tr] where Tr is the
// translation required to re-center it
// Therefore, [Tr] = [M_inv][Rnew_inv][Rold][M]
else if (operation == 3 && angle) {
var m = svgedit.math.transformListToTransform(tlist).matrix;
var roldt = svgroot.createSVGTransform();
roldt.setRotate(angle, oldcenter.x, oldcenter.y);
var rold = roldt.matrix;
var rnew = svgroot.createSVGTransform();
rnew.setRotate(angle, newcenter.x, newcenter.y);
var rnew_inv = rnew.matrix.inverse();
var m_inv = m.inverse();
var extrat = svgedit.math.matrixMultiply(m_inv, rnew_inv, rold, m);
svgedit.coords.remapElement(selected, changes, extrat);
if (angle) {
if (tlist.numberOfItems) {
tlist.insertItemBefore(rnew, 0);
} else {
tlist.appendItem(rnew);
}
}
}
} // a non-group
// if the transform list has been emptied, remove it
if (tlist.numberOfItems == 0) {
selected.removeAttribute('transform');
}
batchCmd.addSubCommand(new svgedit.history.ChangeElementCommand(selected, initial));
return batchCmd;
};
})();