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Funkin/source/funkin/ui/debug/charting/commands/ChangeStartingBPMCommand.hx

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2 KiB
Haxe

package funkin.ui.debug.charting.commands;
import funkin.data.song.SongData.SongTimeChange;
/**
* A command which changes the starting BPM of the song.
*/
@:nullSafety
@:access(funkin.ui.debug.charting.ChartEditorState)
class ChangeStartingBPMCommand implements ChartEditorCommand
{
var targetBPM:Float;
var previousBPM:Float = 100;
public function new(targetBPM:Float)
{
this.targetBPM = targetBPM;
}
public function execute(state:ChartEditorState):Void
{
var timeChanges:Array<SongTimeChange> = state.currentSongMetadata.timeChanges;
if (timeChanges == null || timeChanges.length == 0)
{
previousBPM = 100;
timeChanges = [new SongTimeChange(0, targetBPM)];
}
else
{
previousBPM = timeChanges[0].bpm;
timeChanges[0].bpm = targetBPM;
}
state.currentSongMetadata.timeChanges = timeChanges;
state.noteDisplayDirty = true;
state.notePreviewDirty = true;
state.notePreviewViewportBoundsDirty = true;
state.scrollPositionInPixels = 0;
Conductor.instance.mapTimeChanges(state.currentSongMetadata.timeChanges);
state.updateGridHeight();
}
public function undo(state:ChartEditorState):Void
{
var timeChanges:Array<SongTimeChange> = state.currentSongMetadata.timeChanges;
if (timeChanges == null || timeChanges.length == 0)
{
timeChanges = [new SongTimeChange(0, previousBPM)];
}
else
{
timeChanges[0].bpm = previousBPM;
}
state.currentSongMetadata.timeChanges = timeChanges;
state.noteDisplayDirty = true;
state.notePreviewDirty = true;
state.notePreviewViewportBoundsDirty = true;
state.scrollPositionInPixels = 0;
Conductor.instance.mapTimeChanges(state.currentSongMetadata.timeChanges);
state.updateGridHeight();
}
public function shouldAddToHistory(state:ChartEditorState):Bool
{
// This command is undoable. Add to the history if we actually performed an action.
return (targetBPM != previousBPM);
}
public function toString():String
{
return 'Change Starting BPM to ${targetBPM}';
}
}