transformsWithOnePath.js
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'use strict';
/*
* Thanks to http://fontello.com project for sponsoring this plugin
*/
exports.type = 'full';
exports.active = false;
exports.description = 'performs a set of operations on SVG with one path inside (disabled by default)';
exports.params = {
// width and height to resize SVG and rescale inner Path
width: false,
height: false,
// scale inner Path without resizing SVG
scale: false,
// shiftX/Y inner Path
shiftX: false,
shiftY: false,
// crop SVG width along the real width of inner Path
hcrop: false,
// vertical center inner Path inside SVG height
vcenter: false,
// stringify params
floatPrecision: 3,
leadingZero: true,
negativeExtraSpace: true
};
var _path = require('./_path.js'),
relative2absolute = _path.relative2absolute,
computeCubicBoundingBox = _path.computeCubicBoundingBox,
computeQuadraticBoundingBox = _path.computeQuadraticBoundingBox,
applyTransforms = _path.applyTransforms,
js2path = _path.js2path,
path2js = _path.path2js,
EXTEND = require('whet.extend');
exports.fn = function(data, params) {
data.content.forEach(function(item) {
// only for SVG with one Path inside
if (item.isElem('svg') &&
item.content.length === 1 &&
item.content[0].isElem('path')
) {
var svgElem = item,
pathElem = svgElem.content[0],
// get absoluted Path data
path = relative2absolute(EXTEND(true, [], path2js(pathElem))),
xs = [],
ys = [],
cubicСontrolPoint = [0, 0],
quadraticСontrolPoint = [0, 0],
lastPoint = [0, 0],
cubicBoundingBox,
quadraticBoundingBox,
i,
segment;
path.forEach(function(pathItem) {
// ML
if ('ML'.indexOf(pathItem.instruction) > -1) {
for (i = 0; i < pathItem.data.length; i++) {
if (i % 2 === 0) {
xs.push(pathItem.data[i]);
} else {
ys.push(pathItem.data[i]);
}
}
lastPoint = cubicСontrolPoint = quadraticСontrolPoint = pathItem.data.slice(-2);
// H
} else if (pathItem.instruction === 'H') {
pathItem.data.forEach(function(d) {
xs.push(d);
});
lastPoint[0] = cubicСontrolPoint[0] = quadraticСontrolPoint[0] = pathItem.data[pathItem.data.length - 2];
// V
} else if (pathItem.instruction === 'V') {
pathItem.data.forEach(function(d) {
ys.push(d);
});
lastPoint[1] = cubicСontrolPoint[1] = quadraticСontrolPoint[1] = pathItem.data[pathItem.data.length - 1];
// C
} else if (pathItem.instruction === 'C') {
for (i = 0; i < pathItem.data.length; i += 6) {
segment = pathItem.data.slice(i, i + 6);
cubicBoundingBox = computeCubicBoundingBox.apply(this, lastPoint.concat(segment));
xs.push(cubicBoundingBox.minx);
xs.push(cubicBoundingBox.maxx);
ys.push(cubicBoundingBox.miny);
ys.push(cubicBoundingBox.maxy);
// reflected control point for the next possible S
cubicСontrolPoint = [
2 * segment[4] - segment[2],
2 * segment[5] - segment[3]
];
lastPoint = segment.slice(-2);
}
// S
} else if (pathItem.instruction === 'S') {
for (i = 0; i < pathItem.data.length; i += 4) {
segment = pathItem.data.slice(i, i + 4);
cubicBoundingBox = computeCubicBoundingBox.apply(this, lastPoint.concat(cubicСontrolPoint).concat(segment));
xs.push(cubicBoundingBox.minx);
xs.push(cubicBoundingBox.maxx);
ys.push(cubicBoundingBox.miny);
ys.push(cubicBoundingBox.maxy);
// reflected control point for the next possible S
cubicСontrolPoint = [
2 * segment[2] - cubicСontrolPoint[0],
2 * segment[3] - cubicСontrolPoint[1],
];
lastPoint = segment.slice(-2);
}
// Q
} else if (pathItem.instruction === 'Q') {
for (i = 0; i < pathItem.data.length; i += 4) {
segment = pathItem.data.slice(i, i + 4);
quadraticBoundingBox = computeQuadraticBoundingBox.apply(this, lastPoint.concat(segment));
xs.push(quadraticBoundingBox.minx);
xs.push(quadraticBoundingBox.maxx);
ys.push(quadraticBoundingBox.miny);
ys.push(quadraticBoundingBox.maxy);
// reflected control point for the next possible T
quadraticСontrolPoint = [
2 * segment[2] - segment[0],
2 * segment[3] - segment[1]
];
lastPoint = segment.slice(-2);
}
// S
} else if (pathItem.instruction === 'T') {
for (i = 0; i < pathItem.data.length; i += 2) {
segment = pathItem.data.slice(i, i + 2);
quadraticBoundingBox = computeQuadraticBoundingBox.apply(this, lastPoint.concat(quadraticСontrolPoint).concat(segment));
xs.push(quadraticBoundingBox.minx);
xs.push(quadraticBoundingBox.maxx);
ys.push(quadraticBoundingBox.miny);
ys.push(quadraticBoundingBox.maxy);
// reflected control point for the next possible T
quadraticСontrolPoint = [
2 * segment[0] - quadraticСontrolPoint[0],
2 * segment[1] - quadraticСontrolPoint[1]
];
lastPoint = segment.slice(-2);
}
}
});
var xmin = Math.min.apply(this, xs).toFixed(params.floatPrecision),
xmax = Math.max.apply(this, xs).toFixed(params.floatPrecision),
ymin = Math.min.apply(this, ys).toFixed(params.floatPrecision),
ymax = Math.max.apply(this, ys).toFixed(params.floatPrecision),
svgWidth = +svgElem.attr('width').value,
svgHeight = +svgElem.attr('height').value,
realWidth = Math.round(xmax - xmin),
realHeight = Math.round(ymax - ymin),
transform = '',
scale;
// width & height
if (params.width && params.height) {
scale = Math.min(params.width / svgWidth, params.height / svgHeight);
realWidth = realWidth * scale;
realHeight = realHeight * scale;
svgWidth = svgElem.attr('width').value = params.width;
svgHeight = svgElem.attr('height').value = params.height;
transform += ' scale(' + scale + ')';
// width
} else if (params.width && !params.height) {
scale = params.width / svgWidth;
realWidth = realWidth * scale;
realHeight = realHeight * scale;
svgWidth = svgElem.attr('width').value = params.width;
svgHeight = svgElem.attr('height').value = svgHeight * scale;
transform += ' scale(' + scale + ')';
// height
} else if (params.height && !params.width) {
scale = params.height / svgHeight;
realWidth = realWidth * scale;
realHeight = realHeight * scale;
svgWidth = svgElem.attr('width').value = svgWidth * scale;
svgHeight = svgElem.attr('height').value = params.height;
transform += ' scale(' + scale + ')';
}
// shiftX
if (params.shiftX) {
transform += ' translate(' + realWidth * params.shiftX + ', 0)';
}
// shiftY
if (params.shiftY) {
transform += ' translate(0, ' + realHeight * params.shiftY + ')';
}
// scale
if (params.scale) {
scale = params.scale;
var shiftX = svgWidth / 2,
shiftY = svgHeight / 2;
realWidth = realWidth * scale;
realHeight = realHeight * scale;
if (params.shiftX || params.shiftY) {
transform += ' scale(' + scale + ')';
} else {
transform += ' translate(' + shiftX + ' ' + shiftY + ') scale(' + scale + ') translate(-' + shiftX + ' -' + shiftY + ')';
}
}
// hcrop
if (params.hcrop) {
transform += ' translate(' + (-xmin) + ' 0)';
svgElem.attr('width').value = realWidth;
}
// vcenter
if (params.vcenter) {
transform += ' translate(0 ' + (((svgHeight - realHeight) / 2) - ymin) + ')';
}
if (transform) {
pathElem.addAttr({
name: 'transform',
prefix: '',
local: 'transform',
value: transform
});
path = applyTransforms(pathElem, pathElem.pathJS, true, params.floatPrecision);
// transformed data rounding
path.forEach(function(pathItem) {
if (pathItem.data) {
pathItem.data = pathItem.data.map(function(num) {
return +num.toFixed(params.floatPrecision);
});
}
});
// save new
js2path(pathElem, path, params);
}
}
});
return data;
};