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image-size.js
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image-size.js
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module.exports = function(environment) {
var Dimension = require("../less/tree/dimension"),
Expression = require("../less/tree/expression"),
functionRegistry = require("./../less/functions/function-registry");
function imageSize(functionContext, filePathNode) {
var filePath = filePathNode.value;
var currentFileInfo = functionContext.currentFileInfo;
var currentDirectory = currentFileInfo.relativeUrls ?
currentFileInfo.currentDirectory : currentFileInfo.entryPath;
var fragmentStart = filePath.indexOf('#');
var fragment = '';
if (fragmentStart !== -1) {
fragment = filePath.slice(fragmentStart);
filePath = filePath.slice(0, fragmentStart);
}
var fileManager = environment.getFileManager(filePath, currentDirectory, functionContext.context, environment, true);
if (!fileManager) {
throw {
type: "File",
message: "Can not set up FileManager for " + filePathNode
};
}
var fileSync = fileManager.loadFileSync(filePath, currentDirectory, functionContext.context, environment);
if (fileSync.error) {
throw fileSync.error;
}
var sizeOf = require('image-size');
return sizeOf(fileSync.filename);
}
var imageFunctions = {
"image-size": function(filePathNode) {
var size = imageSize(this, filePathNode);
return new Expression([
new Dimension(size.width, "px"),
new Dimension(size.height, "px")
]);
},
"image-width": function(filePathNode) {
var size = imageSize(this, filePathNode);
return new Dimension(size.width, "px");
},
"image-height": function(filePathNode) {
var size = imageSize(this, filePathNode);
return new Dimension(size.height, "px");
}
};
functionRegistry.addMultiple(imageFunctions);
};