/* ***** BEGIN LICENSE BLOCK *****

* Distributed under the BSD license:

*

* Copyright (c) 2010, Ajax.org B.V.

* All rights reserved.

*

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions are met:

* * Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

* * Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in the

* documentation and/or other materials provided with the distribution.

* * Neither the name of Ajax.org B.V. nor the

* names of its contributors may be used to endorse or promote products

* derived from this software without specific prior written permission.

*

* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND

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*

* ***** END LICENSE BLOCK ***** */

define(function(require, exports, module) {

"use strict";

var oop = require("./lib/oop");

var lang = require("./lib/lang");

var EventEmitter = require("./lib/event_emitter").EventEmitter;

var Editor = require("./editor").Editor;

var Renderer = require("./virtual_renderer").VirtualRenderer;

var EditSession = require("./edit_session").EditSession;

/** internal, hide

* class Split

*

*

*

**/

/** internal, hide

* new Split(container, theme, splits)

* - container (Document): The document to associate with the split

* - theme (String): The name of the initial theme

* - splits (Number): The number of initial splits

*

*

*

**/

var Split = function(container, theme, splits) {

this.BELOW = 1;

this.BESIDE = 0;

this.$container = container;

this.$theme = theme;

this.$splits = 0;

this.$editorCSS = "";

this.$editors = [];

this.$orientation = this.BESIDE;

this.setSplits(splits || 1);

this.$cEditor = this.$editors[0];

this.on("focus", function(editor) {

this.$cEditor = editor;

}.bind(this));

};

(function(){

oop.implement(this, EventEmitter);

this.$createEditor = function() {

var el = document.createElement("div");

el.className = this.$editorCSS;

el.style.cssText = "position: absolute; top:0px; bottom:0px";

this.$container.appendChild(el);

var editor = new Editor(new Renderer(el, this.$theme));

editor.on("focus", function() {

this._emit("focus", editor);

}.bind(this));

this.$editors.push(editor);

editor.setFontSize(this.$fontSize);

return editor;

};

/** internal, hide

* Split.setSplits(splits) -> Void

* - splits (Number): The new number of splits

*

*

*

**/

this.setSplits = function(splits) {

var editor;

if (splits < 1) {

throw "The number of splits have to be > 0!";

}

if (splits == this.$splits) {

return;

} else if (splits > this.$splits) {

while (this.$splits < this.$editors.length && this.$splits < splits) {

editor = this.$editors[this.$splits];

this.$container.appendChild(editor.container);

editor.setFontSize(this.$fontSize);

this.$splits ++;

}

while (this.$splits < splits) {

this.$createEditor();

this.$splits ++;

}

} else {

while (this.$splits > splits) {

editor = this.$editors[this.$splits - 1];

this.$container.removeChild(editor.container);

this.$splits --;

}

}

this.resize();

};

/**

* Split.getSplits() -> Number

*

* Returns the number of splits.

*

**/

this.getSplits = function() {

return this.$splits;

};

/**

* Split.getEditor(idx) -> Editor

* -idx (Number): The index of the editor you want

*

* Returns the editor identified by the index `idx`.

*

**/

this.getEditor = function(idx) {

return this.$editors[idx];

};

/**

* Split.getCurrentEditor() -> Editor

*

* Returns the current editor.

*

**/

this.getCurrentEditor = function() {

return this.$cEditor;

};

/** related to: Editor.focus

* Split.focus() -> Void

*

* Focuses the current editor.

*

**/

this.focus = function() {

this.$cEditor.focus();

};

/** related to: Editor.blur

* Split.blur() -> Void

*

* Blurs the current editor.

*

**/

this.blur = function() {

this.$cEditor.blur();

};

/** related to: Editor.setTheme

* Split.setTheme(theme) -> Void

* - theme (String): The name of the theme to set

*

* Sets a theme for each of the available editors.

**/

this.setTheme = function(theme) {

this.$editors.forEach(function(editor) {

editor.setTheme(theme);

});

};

/** internal, hide

* Split.setKeyboardHandler(keybinding) -> Void

* - keybinding (String):

*

*

**/

this.setKeyboardHandler = function(keybinding) {

this.$editors.forEach(function(editor) {

editor.setKeyboardHandler(keybinding);

});

};

/** internal, hide

* Split.forEach(callback, scope) -> Void

* - callback (Function): A callback function to execute

* - scope (String):

*

* Executes `callback` on all of the available editors.

*

**/

this.forEach = function(callback, scope) {

this.$editors.forEach(callback, scope);

};

/** related to: Editor.setFontSize

* Split.setFontSize(size) -> Void

* - size (Number): The new font size

*

* Sets the font size, in pixels, for all the available editors.

*

**/

this.$fontSize = "";

this.setFontSize = function(size) {

this.$fontSize = size;

this.forEach(function(editor) {

editor.setFontSize(size);

});

};

this.$cloneSession = function(session) {

var s = new EditSession(session.getDocument(), session.getMode());

var undoManager = session.getUndoManager();

if (undoManager) {

var undoManagerProxy = new UndoManagerProxy(undoManager, s);

s.setUndoManager(undoManagerProxy);

}

// Overwrite the default $informUndoManager function such that new delas

// aren't added to the undo manager from the new and the old session.

s.$informUndoManager = lang.deferredCall(function() { s.$deltas = []; });

// Copy over 'settings' from the session.

s.setTabSize(session.getTabSize());

s.setUseSoftTabs(session.getUseSoftTabs());

s.setOverwrite(session.getOverwrite());

s.setBreakpoints(session.getBreakpoints());

s.setUseWrapMode(session.getUseWrapMode());

s.setUseWorker(session.getUseWorker());

s.setWrapLimitRange(session.$wrapLimitRange.min,

session.$wrapLimitRange.max);

s.$foldData = session.$cloneFoldData();

return s;

};

/** related to: Editor.setSession

* Split.setSession(session, idx) -> Void

* - session (EditSession): The new edit session

* - idx (Number): The editor's index you're interested in

*

* Sets a new [[EditSession `EditSession`]] for the indicated editor.

*

**/

this.setSession = function(session, idx) {

var editor;

if (idx == null) {

editor = this.$cEditor;

} else {

editor = this.$editors[idx];

}

// Check if the session is used already by any of the editors in the

// split. If it is, we have to clone the session as two editors using

// the same session can cause terrible side effects (e.g. UndoQueue goes

// wrong). This also gives the user of Split the possibility to treat

// each session on each split editor different.

var isUsed = this.$editors.some(function(editor) {

return editor.session === session;

});

if (isUsed) {

session = this.$cloneSession(session);

}

editor.setSession(session);

// Return the session set on the editor. This might be a cloned one.

return session;

};

/** internal, hide

* Split.getOrientation() -> Number

*

* Returns the orientation.

*

**/

this.getOrientation = function() {

return this.$orientation;

};

/** internal, hide

* Split.setOrientation(oriantation) -> Void

* - oriantation (Number):

*

* Sets the orientation.

*

**/

this.setOrientation = function(orientation) {

if (this.$orientation == orientation) {

return;

}

this.$orientation = orientation;

this.resize();

};

/** internal

* Split.resize() -> Void

*

*

*

**/

this.resize = function() {

var width = this.$container.clientWidth;

var height = this.$container.clientHeight;

var editor;

if (this.$orientation == this.BESIDE) {

var editorWidth = width / this.$splits;

for (var i = 0; i < this.$splits; i++) {

editor = this.$editors[i];

editor.container.style.width = editorWidth + "px";

editor.container.style.top = "0px";

editor.container.style.left = i * editorWidth + "px";

editor.container.style.height = height + "px";

editor.resize();

}

} else {

var editorHeight = height / this.$splits;

for (var i = 0; i < this.$splits; i++) {

editor = this.$editors[i];

editor.container.style.width = width + "px";

editor.container.style.top = i * editorHeight + "px";

editor.container.style.left = "0px";

editor.container.style.height = editorHeight + "px";

editor.resize();

}

}

};

}).call(Split.prototype);

/** internal

* Split.UndoManagerProxy() -> Void

*

*

*

**/

function UndoManagerProxy(undoManager, session) {

this.$u = undoManager;

this.$doc = session;

}

(function() {

this.execute = function(options) {

this.$u.execute(options);

};

this.undo = function() {

var selectionRange = this.$u.undo(true);

if (selectionRange) {

this.$doc.selection.setSelectionRange(selectionRange);

}

};

this.redo = function() {

var selectionRange = this.$u.redo(true);

if (selectionRange) {

this.$doc.selection.setSelectionRange(selectionRange);

}

};

this.reset = function() {

this.$u.reset();

};

this.hasUndo = function() {

return this.$u.hasUndo();

};

this.hasRedo = function() {

return this.$u.hasRedo();

};

}).call(UndoManagerProxy.prototype);

exports.Split = Split;

});