Move lead in/out logic to the timing controllers

This makes adding lead in/out work correctly when autocommit is
disabled, and improves the behavior of adding lead-in when in karaoke
mode.

Originally committed to SVN as r6502.

aegisub/src/ass_karaoke.cpp

@@ -264,6 +264,25 @@ void AssKaraoke::SetStartTime(size_t syl_idx, int time) {
 	prev.duration += delta;
 }
 
+void AssKaraoke::SetLineTimes(int start_time, int end_time) {
+	assert(end_time >= start_time);
+
+	size_t idx = 0;
+	do {
+		int delta = start_time - syls[idx].start_time;
+		syls[idx].start_time = start_time;
+		syls[idx].duration = std::max(0, syls[idx].duration - delta);
+	} while (++idx < syls.size() && syls[idx].start_time < start_time);
+
+	idx = syls.size() - 1;
+	while (syls[idx].start_time > end_time) {
+		syls[idx].start_time = end_time;
+		syls[idx].duration = 0;
+		--idx;
+	}
+	syls[idx].duration = end_time - syls[idx].start_time;
+}
+
 void AssKaraoke::SplitLines(std::set<AssDialogue*> const& lines, agi::Context *c) {
 	if (lines.empty()) return;
 

aegisub/src/ass_karaoke.h

@@ -77,6 +77,8 @@ public:
 	void RemoveSplit(size_t syl_idx);
 	/// Set the start time of a syllable in ms
 	void SetStartTime(size_t syl_idx, int time);
+	/// Adjust the line's start and end times without shifting the syllables
+	void SetLineTimes(int start_time, int end_time);
 
 	typedef std::vector<Syllable>::const_iterator iterator;
 

aegisub/src/audio_timing.h

@@ -103,6 +103,12 @@ public:
 	/// Revert all changes to the last committed state.
 	virtual void Revert() = 0;
 
+	/// Add lead-in time to the current timing unit
+	virtual void AddLeadIn() = 0;
+
+	/// Add lead-out time to the current timing unit
+	virtual void AddLeadOut() = 0;
+
 	/// @brief Determine if a position is close to a draggable marker
 	/// @param ms          The time in milliseconds to test
 	/// @param sensitivity Distance in milliseconds to consider markers as nearby

aegisub/src/audio_timing_dialogue.cpp

@@ -372,6 +372,8 @@ public:
 	void Prev();
 	void Commit();
 	void Revert();
+	void AddLeadIn();
+	void AddLeadOut();
 	bool IsNearbyMarker(int ms, int sensitivity) const;
 	std::vector<AudioMarker*> OnLeftClick(int ms, bool ctrl_down, int sensitivity, int snap_range);
 	std::vector<AudioMarker*> OnRightClick(int ms, bool, int sensitivity, int snap_range);
@@ -545,6 +547,18 @@ void AudioTimingControllerDialogue::Revert()
 	RegenerateInactiveLines();
 }
 
+void AudioTimingControllerDialogue::AddLeadIn()
+{
+	DialogueTimingMarker *m = active_line.GetLeftMarker();
+	SetMarkers(std::vector<AudioMarker*>(1, m), *m - OPT_GET("Audio/Lead/IN")->GetInt());
+}
+
+void AudioTimingControllerDialogue::AddLeadOut()
+{
+	DialogueTimingMarker *m = active_line.GetRightMarker();
+	SetMarkers(std::vector<AudioMarker*>(1, m), *m + OPT_GET("Audio/Lead/OUT")->GetInt());
+}
+
 bool AudioTimingControllerDialogue::IsNearbyMarker(int ms, int sensitivity) const
 {
 	assert(sensitivity >= 0);

aegisub/src/audio_timing_karaoke.cpp

@@ -115,6 +115,7 @@ class AudioTimingControllerKaraoke : public AudioTimingController {
 	void OnAutoNextChange(agi::OptionValue const& opt);
 
 	void DoCommit();
+	void ApplyLead(bool announce_primary);
 
 public:
 	// AudioTimingController implementation
@@ -128,6 +129,8 @@ public:
 	void Prev();
 	void Commit();
 	void Revert();
+	void AddLeadIn();
+	void AddLeadOut();
 	bool IsNearbyMarker(int ms, int sensitivity) const;
 	std::vector<AudioMarker*> OnLeftClick(int ms, bool, int sensitivity, int);
 	std::vector<AudioMarker*> OnRightClick(int, bool, int, int) { return std::vector<AudioMarker*>(); }
@@ -279,6 +282,32 @@ void AudioTimingControllerKaraoke::Revert() {
 	AnnounceMarkerMoved();
 }
 
+void AudioTimingControllerKaraoke::AddLeadIn() {
+	start_marker.Move(start_marker - OPT_GET("Audio/Lead/IN")->GetInt());
+	labels.front().range = TimeRange(start_marker, labels.front().range.end());
+	ApplyLead(cur_syl == 0);
+}
+
+void AudioTimingControllerKaraoke::AddLeadOut() {
+	end_marker.Move(end_marker + OPT_GET("Audio/Lead/OUT")->GetInt());
+	labels.back().range = TimeRange(labels.back().range.begin(), end_marker);
+	ApplyLead(cur_syl == markers.size());
+}
+
+void AudioTimingControllerKaraoke::ApplyLead(bool announce_primary) {
+	kara->SetLineTimes(start_marker, end_marker);
+
+	AnnounceUpdatedStyleRanges();
+	AnnounceMarkerMoved();
+	if (announce_primary)
+		AnnounceUpdatedPrimaryRange();
+
+	if (auto_commit)
+		DoCommit();
+	else
+		commit_id = -1;
+}
+
 bool AudioTimingControllerKaraoke::IsNearbyMarker(int ms, int sensitivity) const {
 	TimeRange range(ms - sensitivity, ms + sensitivity);
 

aegisub/src/command/time.cpp

@@ -250,10 +250,8 @@ struct time_add_lead_in : public Command {
 	STR_DISP("Add lead in")
 	STR_HELP("Add lead in")
 	void operator()(agi::Context *c) {
-		if (AssDialogue *line = c->selectionController->GetActiveLine()) {
-			line->Start = line->Start - OPT_GET("Audio/Lead/IN")->GetInt();
-			c->ass->Commit(_("add lead in"), AssFile::COMMIT_DIAG_TIME);
-		}
+		if (c->audioController->GetTimingController())
+			c->audioController->GetTimingController()->AddLeadIn();
 	}
 };
 
@@ -263,10 +261,8 @@ struct time_add_lead_out : public Command {
 	STR_DISP("Add lead out")
 	STR_HELP("Add lead out")
 	void operator()(agi::Context *c) {
-		if (AssDialogue *line = c->selectionController->GetActiveLine()) {
-			line->End = line->End + OPT_GET("Audio/Lead/OUT")->GetInt();
-			c->ass->Commit(_("add lead out"), AssFile::COMMIT_DIAG_TIME);
-		}
+		if (c->audioController->GetTimingController())
+			c->audioController->GetTimingController()->AddLeadOut();
 	}
 };