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define(function (require, exports, module) {

    var config = require("../config");
    var oop = require("../lib/oop");
    var HashHandler = require("../keyboard/hash_handler").HashHandler;
    var occurStartCommand = require("./occur_commands").occurStartCommand;

// These commands can be installed in a normal key handler to start iSearch:
    exports.iSearchStartCommands = [{
        name: "iSearch",
        bindKey: {win: "Ctrl-F", mac: "Command-F"},
        exec: function (editor, options) {
            config.loadModule(["core", "ace/incremental_search"], function (e) {
                var iSearch = e.iSearch = e.iSearch || new e.IncrementalSearch();
                iSearch.activate(editor, options.backwards);
                if (options.jumpToFirstMatch) iSearch.next(options);
            });
        },
        readOnly: true
    }, {
        name: "iSearchBackwards",
        exec: function (editor, jumpToNext) {
            editor.execCommand('iSearch', {backwards: true});
        },
        readOnly: true
    }, {
        name: "iSearchAndGo",
        bindKey: {win: "Ctrl-K", mac: "Command-G"},
        exec: function (editor, jumpToNext) {
            editor.execCommand('iSearch', {jumpToFirstMatch: true, useCurrentOrPrevSearch: true});
        },
        readOnly: true
    }, {
        name: "iSearchBackwardsAndGo",
        bindKey: {win: "Ctrl-Shift-K", mac: "Command-Shift-G"},
        exec: function (editor) {
            editor.execCommand('iSearch', {jumpToFirstMatch: true, backwards: true, useCurrentOrPrevSearch: true});
        },
        readOnly: true
    }];

// These commands are only available when incremental search mode is active:
    exports.iSearchCommands = [{
        name: "restartSearch",
        bindKey: {win: "Ctrl-F", mac: "Command-F"},
        exec: function (iSearch) {
            iSearch.cancelSearch(true);
        }
    }, {
        name: "searchForward",
        bindKey: {win: "Ctrl-S|Ctrl-K", mac: "Ctrl-S|Command-G"},
        exec: function (iSearch, options) {
            options.useCurrentOrPrevSearch = true;
            iSearch.next(options);
        }
    }, {
        name: "searchBackward",
        bindKey: {win: "Ctrl-R|Ctrl-Shift-K", mac: "Ctrl-R|Command-Shift-G"},
        exec: function (iSearch, options) {
            options.useCurrentOrPrevSearch = true;
            options.backwards = true;
            iSearch.next(options);
        }
    }, {
        name: "extendSearchTerm",
        exec: function (iSearch, string) {
            iSearch.addString(string);
        }
    }, {
        name: "extendSearchTermSpace",
        bindKey: "space",
        exec: function (iSearch) {
            iSearch.addString(' ');
        }
    }, {
        name: "shrinkSearchTerm",
        bindKey: "backspace",
        exec: function (iSearch) {
            iSearch.removeChar();
        }
    }, {
        name: 'confirmSearch',
        bindKey: 'return',
        exec: function (iSearch) {
            iSearch.deactivate();
        }
    }, {
        name: 'cancelSearch',
        bindKey: 'esc|Ctrl-G',
        exec: function (iSearch) {
            iSearch.deactivate(true);
        }
    }, {
        name: 'occurisearch',
        bindKey: 'Ctrl-O',
        exec: function (iSearch) {
            var options = oop.mixin({}, iSearch.$options);
            iSearch.deactivate();
            occurStartCommand.exec(iSearch.$editor, options);
        }
    }, {
        name: "yankNextWord",
        bindKey: "Ctrl-w",
        exec: function (iSearch) {
            var ed = iSearch.$editor,
                range = ed.selection.getRangeOfMovements(function (sel) {
                    sel.moveCursorWordRight();
                }),
                string = ed.session.getTextRange(range);
            iSearch.addString(string);
        }
    }, {
        name: "yankNextChar",
        bindKey: "Ctrl-Alt-y",
        exec: function (iSearch) {
            var ed = iSearch.$editor,
                range = ed.selection.getRangeOfMovements(function (sel) {
                    sel.moveCursorRight();
                }),
                string = ed.session.getTextRange(range);
            iSearch.addString(string);
        }
    }, {
        name: 'recenterTopBottom',
        bindKey: 'Ctrl-l',
        exec: function (iSearch) {
            iSearch.$editor.execCommand('recenterTopBottom');
        }
    }, {
        name: 'selectAllMatches',
        bindKey: 'Ctrl-space',
        exec: function (iSearch) {
            var ed = iSearch.$editor,
                hl = ed.session.$isearchHighlight,
                ranges = hl && hl.cache ? hl.cache
                    .reduce(function (ranges, ea) {
                        return ranges.concat(ea ? ea : []);
                    }, []) : [];
            iSearch.deactivate(false);
            ranges.forEach(ed.selection.addRange.bind(ed.selection));
        }
    }, {
        name: 'searchAsRegExp',
        bindKey: 'Alt-r',
        exec: function (iSearch) {
            iSearch.convertNeedleToRegExp();
        }
    }].map(function (cmd) {
        cmd.readOnly = true;
        cmd.isIncrementalSearchCommand = true;
        cmd.scrollIntoView = "animate-cursor";
        return cmd;
    });

    function IncrementalSearchKeyboardHandler(iSearch) {
        this.$iSearch = iSearch;
    }

    oop.inherits(IncrementalSearchKeyboardHandler, HashHandler);

    (function () {

        this.attach = function (editor) {
            var iSearch = this.$iSearch;
            HashHandler.call(this, exports.iSearchCommands, editor.commands.platform);
            this.$commandExecHandler = editor.commands.addEventListener('exec', function (e) {
                if (!e.command.isIncrementalSearchCommand)
                    return iSearch.deactivate();
                e.stopPropagation();
                e.preventDefault();
                var scrollTop = editor.session.getScrollTop();
                var result = e.command.exec(iSearch, e.args || {});
                editor.renderer.scrollCursorIntoView(null, 0.5);
                editor.renderer.animateScrolling(scrollTop);
                return result;
            });
        };

        this.detach = function (editor) {
            if (!this.$commandExecHandler) return;
            editor.commands.removeEventListener('exec', this.$commandExecHandler);
            delete this.$commandExecHandler;
        };

        var handleKeyboard$super = this.handleKeyboard;
        this.handleKeyboard = function (data, hashId, key, keyCode) {
            if (((hashId === 1/*ctrl*/ || hashId === 8/*command*/) && key === 'v')
                || (hashId === 1/*ctrl*/ && key === 'y')) return null;
            var cmd = handleKeyboard$super.call(this, data, hashId, key, keyCode);
            if (cmd.command) {
                return cmd;
            }
            if (hashId == -1) {
                var extendCmd = this.commands.extendSearchTerm;
                if (extendCmd) {
                    return {command: extendCmd, args: key};
                }
            }
            return false;
        };

    }).call(IncrementalSearchKeyboardHandler.prototype);


    exports.IncrementalSearchKeyboardHandler = IncrementalSearchKeyboardHandler;

});
