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| 1 var postsvg = require('postsvg'); |
| 2 var renameId = require('postsvg-rename-id'); |
| 3 |
| 4 class SVGSpriteSheet { |
| 5 /** |
| 6 * @param {number} width |
| 7 * @param {number} height |
| 8 * @param {!Map<!SVGSprite, !{x: number, y: number}>} spritePositions |
| 9 */ |
| 10 constructor(width, height, spritePositions) { |
| 11 this._width = width; |
| 12 this._height = height; |
| 13 this._sprites = Array.from(spritePositions.keys()); |
| 14 this._positions = spritePositions; |
| 15 } |
| 16 |
| 17 /** |
| 18 * @return {number} |
| 19 */ |
| 20 width() { |
| 21 return this._width; |
| 22 } |
| 23 |
| 24 /** |
| 25 * @return {number} |
| 26 */ |
| 27 height() { |
| 28 return this._height; |
| 29 } |
| 30 |
| 31 /** |
| 32 * @return {!Array<!SVGSprite>} |
| 33 */ |
| 34 sprites() { |
| 35 return this._sprites; |
| 36 } |
| 37 |
| 38 /** |
| 39 * @param {!SVGSprite} sprite |
| 40 * @return {!{x: number, y: number}} |
| 41 */ |
| 42 spritePosition(sprite) { |
| 43 console.assert(this._positions.has(sprite), 'sprite ' + sprite.filePath + '
has undefined position!'); |
| 44 return this._positions.get(sprite); |
| 45 } |
| 46 |
| 47 /** |
| 48 * @return {string} |
| 49 */ |
| 50 svgText() { |
| 51 if (this._svgText) |
| 52 return this._svgText; |
| 53 |
| 54 var svgBody = ''; |
| 55 var spriteId = 0; |
| 56 for (var sprite of this._sprites) { |
| 57 var spriteSVG = sprite.content.trim(); |
| 58 |
| 59 // Strip of <?xml> header, if any. |
| 60 if (spriteSVG.startsWith('<?xml')) { |
| 61 var headerIndexEnd = spriteSVG.indexOf('?>'); |
| 62 spriteSVG = spriteSVG.substring(headerIndexEnd + 2); |
| 63 } |
| 64 |
| 65 // Rename sprite ids to avoid clashing. |
| 66 spriteSVG = postsvg().use(renameId({pattern: 'sprite' + (++spriteId) + '_[
id]'})).process(spriteSVG); |
| 67 |
| 68 // Wrap sprite to SVG container with proper position. |
| 69 var position = this._positions.get(sprite); |
| 70 var prefix = `<svg x="${position.x}" y="${position.y}" width="${sprite.wid
th}" height="${sprite.height}">`; |
| 71 var suffix = '</svg>'; |
| 72 spriteSVG = prefix + spriteSVG + suffix; |
| 73 |
| 74 svgBody += spriteSVG; |
| 75 } |
| 76 |
| 77 var xmlHeader = '<?xml version="1.0" encoding="utf-8"?>'; |
| 78 var spriteSheetHeader = `<svg width="${this._width}" height="${this._height}
" xmlns="http://www.w3.org/2000/svg">`; |
| 79 return xmlHeader + spriteSheetHeader + svgBody + '</svg>'; |
| 80 } |
| 81 }; |
| 82 |
| 83 module.exports = SVGSpriteSheet; |
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