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