08-27-周三_17-09-29

node_modules/less/lib/less-node/image-size.js

@@ -0,0 +1,57 @@
+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);
+};