Merge pull request #881 from ajaxorg/align_cursors

add command to align cursors

lib/ace/commands/multi_select_commands.js

@@ -74,11 +74,15 @@ exports.defaultCommands = [{
 }, {
     name: "splitIntoLines",
     exec: function(editor) { editor.multiSelect.splitIntoLines(); },
-    bindKey: {win: "Ctrl-Shift-L", mac: "Ctrl-Shift-L"},
+    bindKey: {win: "Ctrl-Alt-L", mac: "Ctrl-Alt-L"},
     readonly: true
+}, {
+    name: "alignCursors",
+    exec: function(editor) { editor.alignCursors(); },
+    bindKey: {win: "Ctrl-Alt-A", mac: "Ctrl-Alt-A"}
 }];
 
-// commands active in multiselect mode
+// commands active only in multiselect mode
 exports.multiSelectCommands = [{
     name: "singleSelection",
     bindKey: "esc",

lib/ace/multi_select.js

@@ -35,6 +35,7 @@ var Range = require("./range").Range;
 var Selection = require("./selection").Selection;
 var onMouseDown = require("./mouse/multi_select_handler").onMouseDown;
 var event = require("./lib/event");
+var lang = require("./lib/lang");
 var commands = require("./commands/multi_select_commands");
 exports.commands = commands.defaultCommands.concat(commands.multiSelectCommands);
 
@@ -198,10 +199,19 @@ var EditSession = require("./edit_session").EditSession;
             this.setSelectionRange(range, lastRange.cursor == lastRange.start);
         } else {
             var range = this.getRange();
+            var isBackwards = this.isBackwards();
             var startRow = range.start.row;
             var endRow = range.end.row;
-            if (startRow == endRow)
+            if (startRow == endRow) {
+                if (isBackwards)
+                    var start = range.end, end = range.start;
+                else
+                    var start = range.start, end = range.end;
+                
+                this.addRange(Range.fromPoints(end, end));
+                this.addRange(Range.fromPoints(start, start));
                 return;
+            }
 
             var rectSel = [];
             var r = this.getLineRange(startRow, true);
@@ -645,7 +655,7 @@ var Editor = require("./editor").Editor;
      *
      * Finds the next occurence of text in an active selection and adds it to the selections.
      **/
-    this.selectMore = function (dir, skip) {
+    this.selectMore = function(dir, skip) {
         var session = this.session;
         var sel = session.multiSelect;
 
@@ -665,6 +675,121 @@ var Editor = require("./editor").Editor;
         if (skip)
             this.multiSelect.substractPoint(range.cursor);
     };
+
+    /** extension
+     * Editor.alignCursors()
+     *
+     * aligns cursors or selected text
+     **/
+    this.alignCursors = function() {
+        var session = this.session;
+        var sel = session.multiSelect;
+        var ranges = sel.ranges;
+
+        if (!ranges.length) {
+            var range = this.selection.getRange();
+            var fr = range.start.row, lr = range.end.row;
+            var lines = this.session.doc.removeLines(fr, lr);
+            lines = this.$reAlignText(lines);
+            this.session.doc.insertLines(fr, lines);
+            range.start.column = 0;
+            range.end.column = lines[lines.length - 1].length;
+            this.selection.setRange(range);
+        } else {
+            // filter out ranges on same row
+            var row = -1;
+            var sameRowRanges = ranges.filter(function(r) {
+                if (r.cursor.row == row)
+                    return true;
+                row = r.cursor.row;
+            });
+            sel.$onRemoveRange(sameRowRanges);
+
+            var maxCol = 0;
+            var minSpace = Infinity;
+            var spaceOffsets = ranges.map(function(r) {
+                var p = r.cursor;
+                var line = session.getLine(p.row);
+                var spaceOffset = line.substr(p.column).search(/\S/g);
+                if (spaceOffset == -1)
+                    spaceOffset = 0;
+
+                if (p.column > maxCol)
+                    maxCol = p.column;
+                if (spaceOffset < minSpace)
+                    minSpace = spaceOffset;
+                return spaceOffset;
+            });
+            ranges.forEach(function(r, i) {
+                var p = r.cursor;
+                var l = maxCol - p.column;
+                var d = spaceOffsets[i] - minSpace;
+                if (l > d)
+                    session.insert(p, lang.stringRepeat(" ", l - d));
+                else
+                    session.remove(new Range(p.row, p.column, p.row, p.column - l + d));
+
+                r.start.column = r.end.column = maxCol;
+                r.start.row = r.end.row = p.row;
+                r.cursor = r.end;
+            });
+            sel.fromOrientedRange(ranges[0]);
+            this.renderer.updateCursor();
+            this.renderer.updateBackMarkers();
+        }
+    };
+
+    this.$reAlignText = function(lines) {
+        var isLeftAligned = true, isRightAligned = true;
+        var startW, textW, endW;
+
+        return lines.map(function(line) {
+            var m = line.match(/(\s*)(.*?)(\s*)([=:].*)/);
+            if (!m)
+                return [line];
+
+            if (startW == null) {
+                startW = m[1].length;
+                textW = m[2].length;
+                endW = m[3].length;
+                return m;
+            }
+
+            if (startW + textW + endW != m[1].length + m[2].length + m[3].length)
+                isRightAligned = false;
+            if (startW != m[1].length)
+                isLeftAligned = false;
+
+            if (startW > m[1].length)
+                startW = m[1].length;
+            if (textW < m[2].length)
+                textW = m[2].length;
+            if (endW > m[3].length)
+                endW = m[3].length;
+
+            return m;
+        }).map(isLeftAligned ? isRightAligned ? alignRight : alignLeft : unAlign);
+
+        function strRepeat(n, ch) {
+            return Array(n + 1).join(ch)
+        }
+
+        function alignLeft(m) {
+            return !m[2] ? m[0] : strRepeat(startW, " ") + m[2]
+                + strRepeat(textW - m[2].length + endW, " ")
+                + m[4].replace(/^([=:])\s+/, "$1 ")
+        }
+        function alignRight(m) {
+            return !m[2] ? m[0] : strRepeat(startW + textW - m[2].length, " ") + m[2]
+                + strRepeat(endW, " ")
+                + m[4].replace(/^([=:])\s+/, "$1 ")
+        }
+        function unAlign(m) {
+            return !m[2] ? m[0] : strRepeat(startW, " ") + m[2]
+                + strRepeat(endW, " ")
+                + m[4].replace(/^([=:])\s+/, "$1 ")
+        }
+    }
 }).call(Editor.prototype);