first commit

app_vue/node_modules/css-tree/lib/common/OffsetToLocation.js

@@ -0,0 +1,91 @@
+var adoptBuffer = require('./adopt-buffer');
+var isBOM = require('../tokenizer').isBOM;
+
+var N = 10;
+var F = 12;
+var R = 13;
+
+function computeLinesAndColumns(host, source) {
+    var sourceLength = source.length;
+    var lines = adoptBuffer(host.lines, sourceLength); // +1
+    var line = host.startLine;
+    var columns = adoptBuffer(host.columns, sourceLength);
+    var column = host.startColumn;
+    var startOffset = source.length > 0 ? isBOM(source.charCodeAt(0)) : 0;
+
+    for (var i = startOffset; i < sourceLength; i++) { // -1
+        var code = source.charCodeAt(i);
+
+        lines[i] = line;
+        columns[i] = column++;
+
+        if (code === N || code === R || code === F) {
+            if (code === R && i + 1 < sourceLength && source.charCodeAt(i + 1) === N) {
+                i++;
+                lines[i] = line;
+                columns[i] = column;
+            }
+
+            line++;
+            column = 1;
+        }
+    }
+
+    lines[i] = line;
+    columns[i] = column;
+
+    host.lines = lines;
+    host.columns = columns;
+}
+
+var OffsetToLocation = function() {
+    this.lines = null;
+    this.columns = null;
+    this.linesAndColumnsComputed = false;
+};
+
+OffsetToLocation.prototype = {
+    setSource: function(source, startOffset, startLine, startColumn) {
+        this.source = source;
+        this.startOffset = typeof startOffset === 'undefined' ? 0 : startOffset;
+        this.startLine = typeof startLine === 'undefined' ? 1 : startLine;
+        this.startColumn = typeof startColumn === 'undefined' ? 1 : startColumn;
+        this.linesAndColumnsComputed = false;
+    },
+
+    ensureLinesAndColumnsComputed: function() {
+        if (!this.linesAndColumnsComputed) {
+            computeLinesAndColumns(this, this.source);
+            this.linesAndColumnsComputed = true;
+        }
+    },
+    getLocation: function(offset, filename) {
+        this.ensureLinesAndColumnsComputed();
+
+        return {
+            source: filename,
+            offset: this.startOffset + offset,
+            line: this.lines[offset],
+            column: this.columns[offset]
+        };
+    },
+    getLocationRange: function(start, end, filename) {
+        this.ensureLinesAndColumnsComputed();
+
+        return {
+            source: filename,
+            start: {
+                offset: this.startOffset + start,
+                line: this.lines[start],
+                column: this.columns[start]
+            },
+            end: {
+                offset: this.startOffset + end,
+                line: this.lines[end],
+                column: this.columns[end]
+            }
+        };
+    }
+};
+
+module.exports = OffsetToLocation;