first commit

app_vue/node_modules/css-tree/lib/generator/sourceMap.js

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+var SourceMapGenerator = require('source-map/lib/source-map-generator').SourceMapGenerator;
+var trackNodes = {
+    Atrule: true,
+    Selector: true,
+    Declaration: true
+};
+
+module.exports = function generateSourceMap(handlers) {
+    var map = new SourceMapGenerator();
+    var line = 1;
+    var column = 0;
+    var generated = {
+        line: 1,
+        column: 0
+    };
+    var original = {
+        line: 0, // should be zero to add first mapping
+        column: 0
+    };
+    var sourceMappingActive = false;
+    var activatedGenerated = {
+        line: 1,
+        column: 0
+    };
+    var activatedMapping = {
+        generated: activatedGenerated
+    };
+
+    var handlersNode = handlers.node;
+    handlers.node = function(node) {
+        if (node.loc && node.loc.start && trackNodes.hasOwnProperty(node.type)) {
+            var nodeLine = node.loc.start.line;
+            var nodeColumn = node.loc.start.column - 1;
+
+            if (original.line !== nodeLine ||
+                original.column !== nodeColumn) {
+                original.line = nodeLine;
+                original.column = nodeColumn;
+
+                generated.line = line;
+                generated.column = column;
+
+                if (sourceMappingActive) {
+                    sourceMappingActive = false;
+                    if (generated.line !== activatedGenerated.line ||
+                        generated.column !== activatedGenerated.column) {
+                        map.addMapping(activatedMapping);
+                    }
+                }
+
+                sourceMappingActive = true;
+                map.addMapping({
+                    source: node.loc.source,
+                    original: original,
+                    generated: generated
+                });
+            }
+        }
+
+        handlersNode.call(this, node);
+
+        if (sourceMappingActive && trackNodes.hasOwnProperty(node.type)) {
+            activatedGenerated.line = line;
+            activatedGenerated.column = column;
+        }
+    };
+
+    var handlersChunk = handlers.chunk;
+    handlers.chunk = function(chunk) {
+        for (var i = 0; i < chunk.length; i++) {
+            if (chunk.charCodeAt(i) === 10) { // \n
+                line++;
+                column = 0;
+            } else {
+                column++;
+            }
+        }
+
+        handlersChunk(chunk);
+    };
+
+    var handlersResult = handlers.result;
+    handlers.result = function() {
+        if (sourceMappingActive) {
+            map.addMapping(activatedMapping);
+        }
+
+        return {
+            css: handlersResult(),
+            map: map
+        };
+    };
+
+    return handlers;
+};