fspecii
117 lines
2.8 KiB
JavaScript
Executable File
117 lines
2.8 KiB
JavaScript
Executable File
(function ( PKAE ) {
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'use strict';
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function PKState ( _depth, app ) {
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if (!_depth) _depth = 1;
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var q = this;
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var _id = 1;
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var _fireEvent = app.fireEvent;
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var _listenFor = app.listenFor;
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var undo_state_list = [];
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var redo_state_list = [];
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q.getLastUndoState = function () {
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return (undo_state_list [ undo_state_list.length - 1]);
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};
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q.pushUndoState = function ( state ) {
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if (!state) return (false);
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if (!state.id) state.id = ++_id;
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if (undo_state_list.length >= _depth) undo_state_list.shift ();
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if (undo_state_list.length > 0)
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{
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if (undo_state_list[undo_state_list.length - 1].id !== state.id - 1)
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undo_state_list = [];
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}
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if (redo_state_list.length > 0)
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{
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if (redo_state_list[0].id !== state.id + 1)
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redo_state_list = [];
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}
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undo_state_list.push ( state );
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_fireEvent ( 'StatePush', undo_state_list.length );
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_fireEvent ( 'DidStateChange', undo_state_list, redo_state_list);
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return (true);
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};
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q.popUndoState = function () {
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var last_state =undo_state_list.pop ();
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if (last_state) {
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if (redo_state_list.length > 0)
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{
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if (redo_state_list[0].id !== last_state.id + 1)
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redo_state_list = [];
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}
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var temp = app.engine.wavesurfer.backend.buffer;
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_fireEvent ( 'StateDidPop', last_state, 1 );
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last_state.data = temp;
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redo_state_list.unshift (last_state);
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_fireEvent ( 'DidStateChange', undo_state_list, redo_state_list);
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}
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return (last_state);
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};
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q.shiftRedoState = function () {
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var last_state = redo_state_list.shift ();
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if (last_state) {
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if (undo_state_list.length > 0)
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{
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if (undo_state_list[undo_state_list.length - 1].id !== last_state.id - 1)
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undo_state_list = [];
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}
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var temp = app.engine.wavesurfer.backend.buffer;
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_fireEvent ( 'StateDidPop', last_state, 0 );
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last_state.data = temp;
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undo_state_list.push (last_state);
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_fireEvent ( 'DidStateChange', undo_state_list, redo_state_list);
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}
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return (last_state);
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};
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q.clearAllState = function () {
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undo_state_list = [];
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redo_state_list = [];
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_fireEvent ( 'StateClearAll' );
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_fireEvent ( 'DidStateChange', [], []);
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};
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_listenFor ('StateRequestPush', function ( _state ) {
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q.pushUndoState ( _state );
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});
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_listenFor ('StateRequestUndo', function () {
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q.popUndoState ();
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});
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_listenFor ('StateRequestRedo', function () {
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q.shiftRedoState ();
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});
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_listenFor ('StateRequestClearAll', function () {
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q.clearAllState ();
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});
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_listenFor ('StateRequestLastState', function () {
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_fireEvent ('StateDidLastState', q.getLastUndoState ());
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});
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// -
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};
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PKAE._deps.state = PKState;
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})( PKAudioEditor ); |