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var _ = require('lodash');
var util = require('util');
var path = require('path');
var FolderOutput = require('./folder');
var imagesUtil = require('../utils/images');
/*
Utility mixin to inline all the assets in a book:
- Outline <svg> tags
- Convert svg images as png
- Download remote images
*/
function AssetsInliner() {
FolderOutput.apply(this, arguments);
}
util.inherits(AssetsInliner, FolderOutput);
// Output a SVG buffer as a file
AssetsInliner.prototype.onOutputSVG = function(page, svg) {
this.log.debug.ln('output svg from', page.path);
var filename = _.uniqueId('svg_') + '.png';
// Convert svg buffer to a png file
return imagesUtil.convertSVGBufferToPNG(svg, this.resolve(filename))
// Return relative path from the page
.thenResolve(function() {
return page.relative('/' + filename);
});
};
// Output an image as a file
AssetsInliner.prototype.onOutputImage = function(page, imgFile) {
if (path.extname(imgFile).toLowerCase() != '.svg') {
return imgFile;
}
// Convert SVG to PNG
var filename = _.uniqueId('svg_') + '.png';
return imagesUtil.convertSVGToPNG(page.resolve(imgFile), this.resolve(filename))
// Return relative path from the page
.thenResolve(function() {
return page.relative('/' + filename);
});
};
module.exports = AssetsInliner;
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