summaryrefslogtreecommitdiff
path: root/common/content/editor.js
blob: 234162c56b21faf0e425784d7a8f701b52632a4b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
// Copyright (c) 2008-2011 Kris Maglione <maglione.k at Gmail>
// Copyright (c) 2006-2009 by Martin Stubenschrott <stubenschrott@vimperator.org>
//
// This work is licensed for reuse under an MIT license. Details are
// given in the LICENSE.txt file included with this file.
"use strict";

/** @scope modules */

// command names taken from:
// http://developer.mozilla.org/en/docs/Editor_Embedding_Guide

/** @instance editor */
var Editor = Module("editor", {
    get isCaret() modes.getStack(1).main == modes.CARET,
    get isTextEdit() modes.getStack(1).main == modes.TEXT_EDIT,

    unselectText: function (toEnd) {
        try {
            Editor.getEditor(null).selection[toEnd ? "collapseToEnd" : "collapseToStart"]();
        }
        catch (e) {}
    },

    selectedText: function () String(Editor.getEditor(null).selection),

    pasteClipboard: function (clipboard, toStart) {
        let elem = dactyl.focusedElement;
        if (elem.inputField)
            elem = elem.inputField;

        if (elem.setSelectionRange) {
            let text = dactyl.clipboardRead(clipboard);
            if (!text)
                return;
            if (isinstance(elem, [HTMLInputElement, XULTextBoxElement]))
                text = text.replace(/\n+/g, "");

            // This is a hacky fix - but it works.
            // <s-insert> in the bottom of a long textarea bounces up
            let top = elem.scrollTop;
            let left = elem.scrollLeft;

            let start = elem.selectionStart; // caret position
            let end = elem.selectionEnd;
            let value = elem.value.substring(0, start) + text + elem.value.substring(end);
            elem.value = value;

            if (/^(search|text)$/.test(elem.type))
                Editor.getEditor(elem).rootElement.firstChild.textContent = value;

            elem.selectionStart = Math.min(start + (toStart ? 0 : text.length), elem.value.length);
            elem.selectionEnd = elem.selectionStart;

            elem.scrollTop = top;
            elem.scrollLeft = left;

            events.dispatch(elem, events.create(elem.ownerDocument, "input"));
        }
    },

    // count is optional, defaults to 1
    executeCommand: function (cmd, count) {
        let editor = Editor.getEditor(null);
        let controller = Editor.getController();
        dactyl.assert(callable(cmd) ||
                          controller &&
                          controller.supportsCommand(cmd) &&
                          controller.isCommandEnabled(cmd));

        // XXX: better as a precondition
        if (count == null)
          count = 1;

        let didCommand = false;
        while (count--) {
            // some commands need this try/catch workaround, because a cmd_charPrevious triggered
            // at the beginning of the textarea, would hang the doCommand()
            // good thing is, we need this code anyway for proper beeping
            try {
                if (callable(cmd))
                    cmd(editor, controller);
                else
                    controller.doCommand(cmd);
                didCommand = true;
            }
            catch (e) {
                util.reportError(e);
                dactyl.assert(didCommand);
                break;
            }
        }
    },

    // cmd = y, d, c
    // motion = b, 0, gg, G, etc.
    selectMotion: function selectMotion(cmd, motion, count) {
        // XXX: better as a precondition
        if (count == null)
            count = 1;

        if (cmd == motion) {
            motion = "j";
            count--;
        }

        if (modes.main != modes.VISUAL)
            modes.push(modes.VISUAL);

        switch (motion) {
        case "j":
            this.executeCommand("cmd_beginLine", 1);
            this.executeCommand("cmd_selectLineNext", count + 1);
            break;
        case "k":
            this.executeCommand("cmd_beginLine", 1);
            this.executeCommand("cmd_lineNext", 1);
            this.executeCommand("cmd_selectLinePrevious", count + 1);
            break;
        case "h":
            this.executeCommand("cmd_selectCharPrevious", count);
            break;
        case "l":
            this.executeCommand("cmd_selectCharNext", count);
            break;
        case "e":
        case "w":
            this.executeCommand("cmd_selectWordNext", count);
            break;
        case "b":
            this.executeCommand("cmd_selectWordPrevious", count);
            break;
        case "0":
        case "^":
            this.executeCommand("cmd_selectBeginLine", 1);
            break;
        case "$":
            this.executeCommand("cmd_selectEndLine", 1);
            break;
        case "gg":
            this.executeCommand("cmd_endLine", 1);
            this.executeCommand("cmd_selectTop", 1);
            this.executeCommand("cmd_selectBeginLine", 1);
            break;
        case "G":
            this.executeCommand("cmd_beginLine", 1);
            this.executeCommand("cmd_selectBottom", 1);
            this.executeCommand("cmd_selectEndLine", 1);
            break;

        default:
            dactyl.beep();
            return;
        }
    },

    // This function will move/select up to given "pos"
    // Simple setSelectionRange() would be better, but we want to maintain the correct
    // order of selectionStart/End (a Gecko bug always makes selectionStart <= selectionEnd)
    // Use only for small movements!
    moveToPosition: function (pos, forward, select) {
        if (!select) {
            Editor.getEditor().setSelectionRange(pos, pos);
            return;
        }

        if (forward) {
            if (pos <= Editor.getEditor().selectionEnd || pos > Editor.getEditor().value.length)
                return;

            do { // TODO: test code for endless loops
                this.executeCommand("cmd_selectCharNext", 1);
            }
            while (Editor.getEditor().selectionEnd != pos);
        }
        else {
            if (pos >= Editor.getEditor().selectionStart || pos < 0)
                return;

            do { // TODO: test code for endless loops
                this.executeCommand("cmd_selectCharPrevious", 1);
            }
            while (Editor.getEditor().selectionStart != pos);
        }
    },

    findChar: function (key, count, backward) {

        let editor = Editor.getEditor();
        if (!editor)
            return -1;

        // XXX
        if (count == null)
            count = 1;

        let code = events.fromString(key)[0].charCode;
        util.assert(code);
        let char = String.fromCharCode(code);

        let text = editor.value;
        let caret = editor.selectionEnd;
        if (backward) {
            let end = text.lastIndexOf("\n", caret);
            while (caret > end && caret >= 0 && count--)
                caret = text.lastIndexOf(char, caret - 1);
        }
        else {
            let end = text.indexOf("\n", caret);
            if (end == -1)
                end = text.length;

            while (caret < end && caret >= 0 && count--)
                caret = text.indexOf(char, caret + 1);
        }

        if (count > 0)
            caret = -1;
        if (caret == -1)
            dactyl.beep();
        return caret;
    },

    /**
     * Edits the given file in the external editor as specified by the
     * 'editor' option.
     *
     * @param {object|File|string} args An object specifying the file, line,
     *     and column to edit. If a non-object is specified, it is treated as
     *     the file parameter of the object.
     * @param {boolean} blocking If true, this function does not return
     *     until the editor exits.
     */
    editFileExternally: function (args, blocking) {
        if (!isObject(args) || args instanceof File)
            args = { file: args };
        args.file = args.file.path || args.file;

        let args = options.get("editor").format(args);

        dactyl.assert(args.length >= 1, _("option.notSet", "editor"));

        io.run(args.shift(), args, blocking);
    },

    // TODO: clean up with 2 functions for textboxes and currentEditor?
    editFieldExternally: function editFieldExternally(forceEditing) {
        if (!options["editor"])
            return;

        let textBox = config.isComposeWindow ? null : dactyl.focusedElement;
        let line, column;

        if (!forceEditing && textBox && textBox.type == "password") {
            commandline.input(_("editor.prompt.editPassword") + " ",
                function (resp) {
                    if (resp && resp.match(/^y(es)?$/i))
                        editor.editFieldExternally(true);
                });
                return;
        }

        if (textBox) {
            var text = textBox.value;
            let pre = text.substr(0, textBox.selectionStart);
            line = 1 + pre.replace(/[^\n]/g, "").length;
            column = 1 + pre.replace(/[^]*\n/, "").length;
        }
        else {
            var editor_ = window.GetCurrentEditor ? GetCurrentEditor()
                                                  : Editor.getEditor(document.commandDispatcher.focusedWindow);
            dactyl.assert(editor_);
            text = Array.map(editor_.rootElement.childNodes, function (e) util.domToString(e, true)).join("");
        }

        let origGroup = textBox && textBox.getAttributeNS(NS, "highlight") || "";
        let cleanup = util.yieldable(function cleanup(error) {
            if (timer)
                timer.cancel();

            let blink = ["EditorBlink1", "EditorBlink2"];
            if (error) {
                dactyl.reportError(error, true);
                blink[1] = "EditorError";
            }
            else
                dactyl.trapErrors(update, null, true);

            if (tmpfile && tmpfile.exists())
                tmpfile.remove(false);

            if (textBox) {
                dactyl.focus(textBox);
                for (let group in values(blink.concat(blink, ""))) {
                    highlight.highlightNode(textBox, origGroup + " " + group);
                    yield 100;
                }
            }
        });

        function update(force) {
            if (force !== true && tmpfile.lastModifiedTime <= lastUpdate)
                return;
            lastUpdate = Date.now();

            let val = tmpfile.read();
            if (textBox) {
                textBox.value = val;

                textBox.setAttributeNS(NS, "modifiable", true);
                util.computedStyle(textBox).MozUserInput;
                events.dispatch(textBox, events.create(textBox.ownerDocument, "input", {}));
                textBox.removeAttributeNS(NS, "modifiable");
            }
            else {
                while (editor_.rootElement.firstChild)
                    editor_.rootElement.removeChild(editor_.rootElement.firstChild);
                editor_.rootElement.innerHTML = val;
            }
        }

        try {
            var tmpfile = io.createTempFile();
            if (!tmpfile)
                throw Error(_("io.cantCreateTempFile"));

            if (textBox) {
                highlight.highlightNode(textBox, origGroup + " EditorEditing");
                textBox.blur();
            }

            if (!tmpfile.write(text))
                throw Error(_("io.cantEncode"));

            var lastUpdate = Date.now();

            var timer = services.Timer(update, 100, services.Timer.TYPE_REPEATING_SLACK);
            this.editFileExternally({ file: tmpfile.path, line: line, column: column }, cleanup);
        }
        catch (e) {
            cleanup(e);
        }
    },

    /**
     * Expands an abbreviation in the currently active textbox.
     *
     * @param {string} mode The mode filter.
     * @see Abbreviation#expand
     */
    expandAbbreviation: function (mode) {
        let elem = dactyl.focusedElement;
        if (!(elem && elem.value))
            return;

        let text   = elem.value;
        let start  = elem.selectionStart;
        let end    = elem.selectionEnd;
        let abbrev = abbreviations.match(mode, text.substring(0, start).replace(/.*\s/g, ""));
        if (abbrev) {
            let len = abbrev.lhs.length;
            let rhs = abbrev.expand(elem);
            elem.value = text.substring(0, start - len) + rhs + text.substring(start);
            elem.selectionStart = start - len + rhs.length;
            elem.selectionEnd   = end   - len + rhs.length;
        }
    },
}, {
    extendRange: function extendRange(range, forward, re, sameWord) {
        function advance(positive) {
            let idx = range.endOffset;
            while (idx < text.length && re.test(text[idx++]) == positive)
                range.setEnd(range.endContainer, idx);
        }
        function retreat(positive) {
            let idx = range.startOffset;
            while (idx > 0 && re.test(text[--idx]) == positive)
                range.setStart(range.startContainer, idx);
        }

        let nodeRange = range.cloneRange();
        nodeRange.selectNodeContents(range.startContainer);
        let text = String(nodeRange);

        if (forward) {
            advance(true);
            if (!sameWord)
                advance(false);
        }
        else {
            if (!sameWord)
                retreat(false);
            retreat(true);
        }
        return range;
    },

    getEditor: function (elem) {
        if (arguments.length === 0) {
            dactyl.assert(dactyl.focusedElement);
            return dactyl.focusedElement;
        }

        if (!elem)
            elem = dactyl.focusedElement || document.commandDispatcher.focusedWindow;
        dactyl.assert(elem);

        try {
            if (elem instanceof Element)
                return elem.QueryInterface(Ci.nsIDOMNSEditableElement).editor;
            return elem.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIWebNavigation)
                       .QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIEditingSession)
                       .getEditorForWindow(elem);
        }
        catch (e) {
            return null;
        }
    },

    getController: function () {
        let ed = dactyl.focusedElement;
        if (!ed || !ed.controllers)
            return null;

        return ed.controllers.getControllerForCommand("cmd_beginLine");
    }
}, {
    mappings: function () {

        // add mappings for commands like h,j,k,l,etc. in CARET, VISUAL and TEXT_EDIT mode
        function addMovementMap(keys, description, hasCount, caretModeMethod, caretModeArg, textEditCommand, visualTextEditCommand) {
            let extraInfo = {};
            if (hasCount)
                extraInfo.count = true;

            function caretExecute(arg, again) {
                function fixSelection() {
                    sel.removeAllRanges();
                    sel.addRange(RangeFind.endpoint(
                        RangeFind.nodeRange(buffer.focusedFrame.document.documentElement),
                        true));
                }

                let controller = buffer.selectionController;
                let sel = controller.getSelection(controller.SELECTION_NORMAL);
                if (!sel.rangeCount) // Hack.
                    fixSelection();

                try {
                    controller[caretModeMethod](caretModeArg, arg);
                }
                catch (e) {
                    dactyl.assert(again && e.result === Cr.NS_ERROR_FAILURE);
                    fixSelection();
                    caretExecute(arg, false);
                }
            }

            mappings.add([modes.CARET], keys, description,
                function ({ count }) {
                    if (!count)
                       count = 1;

                    while (count--)
                        caretExecute(false, true);
                },
                extraInfo);

            mappings.add([modes.VISUAL], keys, description,
                function ({ count }) {
                    if (!count)
                        count = 1;

                    let editor_ = Editor.getEditor(null);
                    let controller = buffer.selectionController;
                    while (count-- && modes.main == modes.VISUAL) {
                        if (editor.isTextEdit) {
                            if (callable(visualTextEditCommand))
                                visualTextEditCommand(editor_);
                            else
                                editor.executeCommand(visualTextEditCommand);
                        }
                        else
                            caretExecute(true, true);
                    }
                },
                extraInfo);

            mappings.add([modes.TEXT_EDIT], keys, description,
                function ({ count }) {
                    if (!count)
                        count = 1;

                    editor.executeCommand(textEditCommand, count);
                },
                extraInfo);
        }

        // add mappings for commands like i,a,s,c,etc. in TEXT_EDIT mode
        function addBeginInsertModeMap(keys, commands, description) {
            mappings.add([modes.TEXT_EDIT], keys, description || "",
                function () {
                    commands.forEach(function (cmd)
                        editor.executeCommand(cmd, 1));
                    modes.push(modes.INSERT);
                });
        }

        function selectPreviousLine() {
            editor.executeCommand("cmd_selectLinePrevious");
            if ((modes.extended & modes.LINE) && !editor.selectedText())
                editor.executeCommand("cmd_selectLinePrevious");
        }

        function selectNextLine() {
            editor.executeCommand("cmd_selectLineNext");
            if ((modes.extended & modes.LINE) && !editor.selectedText())
                editor.executeCommand("cmd_selectLineNext");
        }

        function updateRange(editor, forward, re, modify) {
            let range = Editor.extendRange(editor.selection.getRangeAt(0),
                                           forward, re, false);
            modify(range);
            editor.selection.removeAllRanges();
            editor.selection.addRange(range);
        }
        function move(forward, re)
            function _move(editor) {
                updateRange(editor, forward, re, function (range) { range.collapse(!forward); });
            }
        function select(forward, re)
            function _select(editor) {
                updateRange(editor, forward, re, function (range) {});
            }
        function beginLine(editor_) {
            editor.executeCommand("cmd_beginLine");
            move(true, /\S/)(editor_);
        }

        //             COUNT  CARET                   TEXT_EDIT            VISUAL_TEXT_EDIT
        addMovementMap(["k", "<Up>"],                 "Move up one line",
                       true,  "lineMove", false,      "cmd_linePrevious", selectPreviousLine);
        addMovementMap(["j", "<Down>", "<Return>"],   "Move down one line",
                       true,  "lineMove", true,       "cmd_lineNext",     selectNextLine);
        addMovementMap(["h", "<Left>", "<BS>"],       "Move left one character",
                       true,  "characterMove", false, "cmd_charPrevious", "cmd_selectCharPrevious");
        addMovementMap(["l", "<Right>", "<Space>"],   "Move right one character",
                       true,  "characterMove", true,  "cmd_charNext",     "cmd_selectCharNext");
        addMovementMap(["b", "<C-Left>"],             "Move left one word",
                       true,  "wordMove", false,      "cmd_wordPrevious", "cmd_selectWordPrevious");
        addMovementMap(["w", "<C-Right>"],            "Move right one word",
                       true,  "wordMove", true,       "cmd_wordNext",     "cmd_selectWordNext");
        addMovementMap(["B"],                         "Move left to the previous white space",
                       true,  "wordMove", false,      move(false, /\S/),  select(false, /\S/));
        addMovementMap(["W"],                         "Move right to just beyond the next white space",
                       true,  "wordMove", true,       move(true,  /\S/),  select(true,  /\S/));
        addMovementMap(["e"],                         "Move to the end of the current word",
                       true,  "wordMove", true,       move(true,  /\W/),  select(true,  /\W/));
        addMovementMap(["E"],                         "Move right to the next white space",
                       true,  "wordMove", true,       move(true,  /\s/),  select(true,  /\s/));
        addMovementMap(["<C-f>", "<PageDown>"],       "Move down one page",
                       true,  "pageMove", true,       "cmd_movePageDown", "cmd_selectNextPage");
        addMovementMap(["<C-b>", "<PageUp>"],         "Move up one page",
                       true,  "pageMove", false,      "cmd_movePageUp",   "cmd_selectPreviousPage");
        addMovementMap(["gg", "<C-Home>"],            "Move to the start of text",
                       false, "completeMove", false,  "cmd_moveTop",      "cmd_selectTop");
        addMovementMap(["G", "<C-End>"],              "Move to the end of text",
                       false, "completeMove", true,   "cmd_moveBottom",   "cmd_selectBottom");
        addMovementMap(["0", "<Home>"],               "Move to the beginning of the line",
                       false, "intraLineMove", false, "cmd_beginLine",    "cmd_selectBeginLine");
        addMovementMap(["^"],                         "Move to the first non-whitespace character of the line",
                       false, "intraLineMove", false, beginLine,          "cmd_selectBeginLine");
        addMovementMap(["$", "<End>"],                "Move to the end of the current line",
                       false, "intraLineMove", true,  "cmd_endLine" ,     "cmd_selectEndLine");

        addBeginInsertModeMap(["i", "<Insert>"], [], "Insert text before the cursor");
        addBeginInsertModeMap(["a"],             ["cmd_charNext"], "Append text after the cursor");
        addBeginInsertModeMap(["I"],             ["cmd_beginLine"], "Insert text at the beginning of the line");
        addBeginInsertModeMap(["A"],             ["cmd_endLine"], "Append text at the end of the line");
        addBeginInsertModeMap(["s"],             ["cmd_deleteCharForward"], "Delete the character in front of the cursor and start insert");
        addBeginInsertModeMap(["S"],             ["cmd_deleteToEndOfLine", "cmd_deleteToBeginningOfLine"], "Delete the current line and start insert");
        addBeginInsertModeMap(["C"],             ["cmd_deleteToEndOfLine"], "Delete from the cursor to the end of the line and start insert");

        function addMotionMap(key, desc, cmd, mode) {
            mappings.add([modes.TEXT_EDIT], [key],
                desc,
                function ({ count,  motion }) {
                    editor.selectMotion(key, motion, Math.max(count, 1));
                    if (callable(cmd))
                        cmd.call(events, Editor.getEditor(null));
                    else {
                        editor.executeCommand(cmd, 1);
                        modes.pop(modes.TEXT_EDIT);
                    }
                    if (mode)
                        modes.push(mode);
                },
                { count: true, motion: true });
        }

        addMotionMap("d", "Delete motion", "cmd_delete");
        addMotionMap("c", "Change motion", "cmd_delete", modes.INSERT);
        addMotionMap("y", "Yank motion",   "cmd_copy");

        mappings.add([modes.INPUT],
            ["<C-w>"], "Delete previous word",
            function () { editor.executeCommand("cmd_deleteWordBackward", 1); });

        mappings.add([modes.INPUT],
            ["<C-u>"], "Delete until beginning of current line",
            function () {
                // Deletes the whole line. What the hell.
                // editor.executeCommand("cmd_deleteToBeginningOfLine", 1);

                editor.executeCommand("cmd_selectBeginLine", 1);
                if (Editor.getController().isCommandEnabled("cmd_delete"))
                    editor.executeCommand("cmd_delete", 1);
            });

        mappings.add([modes.INPUT],
            ["<C-k>"], "Delete until end of current line",
            function () { editor.executeCommand("cmd_deleteToEndOfLine", 1); });

        mappings.add([modes.INPUT],
            ["<C-a>"], "Move cursor to beginning of current line",
            function () { editor.executeCommand("cmd_beginLine", 1); });

        mappings.add([modes.INPUT],
            ["<C-e>"], "Move cursor to end of current line",
            function () { editor.executeCommand("cmd_endLine", 1); });

        mappings.add([modes.INPUT],
            ["<C-h>"], "Delete character to the left",
            function () { events.feedkeys("<BS>", true); });

        mappings.add([modes.INPUT],
            ["<C-d>"], "Delete character to the right",
            function () { editor.executeCommand("cmd_deleteCharForward", 1); });

        mappings.add([modes.INPUT],
            ["<S-Insert>"], "Insert clipboard/selection",
            function () { editor.pasteClipboard(); });

        mappings.add([modes.INPUT, modes.TEXT_EDIT],
            ["<C-i>"], "Edit text field with an external editor",
            function () { editor.editFieldExternally(); });

        mappings.add([modes.INPUT],
            ["<C-t>"], "Edit text field in Vi mode",
            function () {
                dactyl.assert(!editor.isTextEdit);
                modes.push(modes.TEXT_EDIT);
            });

        // Ugh.
        mappings.add([modes.INPUT, modes.CARET],
            ["<*-CR>", "<*-BS>", "<*-Del>", "<*-Left>", "<*-Right>", "<*-Up>", "<*-Down>",
             "<*-Home>", "<*-End>", "<*-PageUp>", "<*-PageDown>",
             "<M-c>", "<M-v>"],
            "Handled by " + config.host,
            function () Events.PASS);

        mappings.add([modes.INSERT, modes.NORMAL],
            ["<Tab>"], "Select the next element in the tab sequence",
            function () Events.PASS);
        mappings.add([modes.INSERT, modes.NORMAL],
            ["<S-Tab>"], "Select the previous element in the tab sequence",
            function () Events.PASS);

        mappings.add([modes.INSERT],
            ["<Space>", "<Return>"], "Expand insert mode abbreviation",
            function () {
                editor.expandAbbreviation(modes.INSERT);
                return Events.PASS_THROUGH;
            });

        mappings.add([modes.INSERT],
            ["<C-]>", "<C-5>"], "Expand insert mode abbreviation",
            function () { editor.expandAbbreviation(modes.INSERT); });

        // text edit mode
        mappings.add([modes.TEXT_EDIT],
            ["u"], "Undo changes",
            function (args) {
                editor.executeCommand("cmd_undo", Math.max(args.count, 1));
                editor.unselectText();
            },
            { count: true });

        mappings.add([modes.TEXT_EDIT],
            ["<C-r>"], "Redo undone changes",
            function (args) {
                editor.executeCommand("cmd_redo", Math.max(args.count, 1));
                editor.unselectText();
            },
            { count: true });

        mappings.add([modes.TEXT_EDIT],
            ["D"], "Delete the characters under the cursor until the end of the line",
            function () { editor.executeCommand("cmd_deleteToEndOfLine"); });

        mappings.add([modes.TEXT_EDIT],
            ["o"], "Open line below current",
            function () {
                editor.executeCommand("cmd_endLine", 1);
                modes.push(modes.INSERT);
                events.feedkeys("<Return>");
            });

        mappings.add([modes.TEXT_EDIT],
            ["O"], "Open line above current",
            function () {
                editor.executeCommand("cmd_beginLine", 1);
                modes.push(modes.INSERT);
                events.feedkeys("<Return>");
                editor.executeCommand("cmd_linePrevious", 1);
            });

        mappings.add([modes.TEXT_EDIT],
            ["X"], "Delete character to the left",
            function (args) { editor.executeCommand("cmd_deleteCharBackward", Math.max(args.count, 1)); },
            { count: true });

        mappings.add([modes.TEXT_EDIT],
            ["x"], "Delete character to the right",
            function (args) { editor.executeCommand("cmd_deleteCharForward", Math.max(args.count, 1)); },
            { count: true });

        // visual mode
        mappings.add([modes.CARET, modes.TEXT_EDIT],
            ["v"], "Start visual mode",
            function () { modes.push(modes.VISUAL); });

        mappings.add([modes.VISUAL],
            ["v", "V"], "End visual mode",
            function () { modes.pop(); });

        mappings.add([modes.TEXT_EDIT],
            ["V"], "Start visual line mode",
            function () {
                modes.push(modes.VISUAL, modes.LINE);
                editor.executeCommand("cmd_beginLine", 1);
                editor.executeCommand("cmd_selectLineNext", 1);
            });

        mappings.add([modes.VISUAL],
            ["c", "s"], "Change selected text",
            function () {
                dactyl.assert(editor.isTextEdit);
                editor.executeCommand("cmd_cut");
                modes.push(modes.INSERT);
            });

        mappings.add([modes.VISUAL],
            ["d", "x"], "Delete selected text",
            function () {
                dactyl.assert(editor.isTextEdit);
                editor.executeCommand("cmd_cut");
            });

        mappings.add([modes.VISUAL],
            ["y"], "Yank selected text",
            function () {
                if (editor.isTextEdit) {
                    editor.executeCommand("cmd_copy");
                    modes.pop();
                }
                else
                    dactyl.clipboardWrite(buffer.currentWord, true);
            });

        mappings.add([modes.VISUAL, modes.TEXT_EDIT],
            ["p"], "Paste clipboard contents",
            function ({ count }) {
                dactyl.assert(!editor.isCaret);
                editor.executeCommand("cmd_paste", count || 1);
                modes.pop(modes.TEXT_EDIT);
            },
            { count: true });

        // finding characters
        mappings.add([modes.TEXT_EDIT, modes.VISUAL],
            ["f"], "Move to a character on the current line after the cursor",
            function ({ arg, count }) {
                let pos = editor.findChar(arg, Math.max(count, 1));
                if (pos >= 0)
                    editor.moveToPosition(pos, true, modes.main == modes.VISUAL);
            },
            { arg: true, count: true });

        mappings.add([modes.TEXT_EDIT, modes.VISUAL],
            ["F"], "Move to a character on the current line before the cursor",
            function ({ arg, count }) {
                let pos = editor.findChar(arg, Math.max(count, 1), true);
                if (pos >= 0)
                    editor.moveToPosition(pos, false, modes.main == modes.VISUAL);
            },
            { arg: true, count: true });

        mappings.add([modes.TEXT_EDIT, modes.VISUAL],
            ["t"], "Move before a character on the current line",
            function ({ arg, count }) {
                let pos = editor.findChar(arg, Math.max(count, 1));
                if (pos >= 0)
                    editor.moveToPosition(pos - 1, true, modes.main == modes.VISUAL);
            },
            { arg: true, count: true });

        mappings.add([modes.TEXT_EDIT, modes.VISUAL],
            ["T"], "Move before a character on the current line, backwards",
            function ({ arg, count }) {
                let pos = editor.findChar(arg, Math.max(count, 1), true);
                if (pos >= 0)
                    editor.moveToPosition(pos + 1, false, modes.main == modes.VISUAL);
            },
            { arg: true, count: true });

        // text edit and visual mode
        mappings.add([modes.TEXT_EDIT, modes.VISUAL],
            ["~"], "Switch case of the character under the cursor and move the cursor to the right",
            function ({ count }) {
                if (modes.main == modes.VISUAL)
                    count = Editor.getEditor().selectionEnd - Editor.getEditor().selectionStart;
                count = Math.max(count, 1);

                // FIXME: do this in one pass?
                while (count-- > 0) {
                    let text = Editor.getEditor().value;
                    let pos = Editor.getEditor().selectionStart;
                    dactyl.assert(pos < text.length);

                    let chr = text[pos];
                    Editor.getEditor().value = text.substring(0, pos) +
                        (chr == chr.toLocaleLowerCase() ? chr.toLocaleUpperCase() : chr.toLocaleLowerCase()) +
                        text.substring(pos + 1);
                    editor.moveToPosition(pos + 1, true, false);
                }
                modes.pop(modes.TEXT_EDIT);
            },
            { count: true });

        function bind() mappings.add.apply(mappings,
                                           [[modes.AUTOCOMPLETE]].concat(Array.slice(arguments)))

        bind(["<Esc>"], "Return to INSERT mode",
             function () Events.PASS_THROUGH);

        bind(["<C-[>"], "Return to INSERT mode",
             function () { events.feedkeys("<Esc>", { skipmap: true }); });

        bind(["<Up>"], "Select the previous autocomplete result",
             function () Events.PASS_THROUGH);

        bind(["<C-p>"], "Select the previous autocomplete result",
             function () { events.feedkeys("<Up>", { skipmap: true }); });

        bind(["<Down>"], "Select the next autocomplete result",
             function () Events.PASS_THROUGH);

        bind(["<C-n>"], "Select the next autocomplete result",
             function () { events.feedkeys("<Down>", { skipmap: true }); });
    },

    options: function () {
        options.add(["editor"],
            "The external text editor",
            "string", 'gvim -f +<line> +"sil! call cursor(0, <column>)" <file>', {
                format: function (obj, value) {
                    let args = commands.parseArgs(value || this.value, { argCount: "*", allowUnknownOptions: true })
                                       .map(util.compileMacro).filter(function (fmt) fmt.valid(obj))
                                       .map(function (fmt) fmt(obj));
                    if (obj["file"] && !this.has("file"))
                        args.push(obj["file"]);
                    return args;
                },
                has: function (key) Set.has(util.compileMacro(this.value).seen, key),
                validator: function (value) {
                    this.format({}, value);
                    return Object.keys(util.compileMacro(value).seen).every(function (k) ["column", "file", "line"].indexOf(k) >= 0);
                }
            });

        options.add(["insertmode", "im"],
            "Enter Insert mode rather than Text Edit mode when focusing text areas",
            "boolean", true);
    }
});

// vim: set fdm=marker sw=4 ts=4 et: