Files
reasampler/src/actions.cpp
T
daniel fad2544256 feat(actions): prompt Save-As on Design View tag when project is unsaved
Mirrors capture: when membership is non-empty and the project has no .rpp,
Main_SaveProject(proj, true) prompts Save-As before persisting; cancel leaves
the in-session tag state intact and warns via console.
2026-07-23 14:35:19 -04:00

275 lines
13 KiB
C++

// actions.cpp — the Design View action family (Phase D4). See actions.h.
//
// Compiled into the reaper_reasampler MODULE. Includes reaper_plugin_functions.h
// WITHOUT REAPERAPI_IMPLEMENT — main.cpp is the one TU that defines the API pointers
// (CLAUDE.md §contract). The action ids are minted from FOREVER-STABLE strings (the
// same CEREBELLUM_REASAMPLER_ family prefix main.cpp uses); user keybindings key off
// them, so they must never change after ship.
//
// Each action:
// 1. mutates the session's ViewModeModel (membership tag/untag/show-both, or the
// active mode via toggle/activate) — the pure D1 state,
// 2. reapplies the active mode through the D2 view shell (applyMode) so the change
// takes visible effect immediately (tagging a track into Design while in Arrange
// parks it right away; a mode change re-partitions and re-parks in one step).
//
// Selection-driven mutations iterate the CURRENT REAPER track selection
// (CountSelectedTracks/GetSelectedTrack — both ignore the master, which is correct:
// the master is never tagged) and resolve each track to its canonical GUID key via
// the shared guidString helper, so the keys match exactly what the D2 shell / view
// tree key on (the cross-module key contract).
#include "actions.h"
#include <string>
#include <vector>
#include "persist.h" // ReaSamplerSession (owns view() model)
#include "track_guid.h" // shared MediaTrack* -> canonical GUID key
#include "view.h" // applyMode (D2 shell)
#include "view_mode_model.h"
#include "reaper_plugin.h" // reaper_plugin_info_t, gaccel_register_t (full defs)
#define REAPERAPI_MINIMAL
#define REAPERAPI_WANT_CountSelectedTracks
#define REAPERAPI_WANT_GetSelectedTrack
#define REAPERAPI_WANT_EnumProjects
#define REAPERAPI_WANT_Main_SaveProject
#define REAPERAPI_WANT_ShowConsoleMsg
#include "reaper_plugin_functions.h"
namespace reasampler {
namespace {
// FOREVER-STABLE action-id strings. Same family prefix as main.cpp's capture/panel
// actions; each full string is minted into a persistent command id and user
// keybindings key off it — NEVER change these after ship.
constexpr const char* kIdToggleMode = "CEREBELLUM_REASAMPLER_VIEW_TOGGLE_MODE";
constexpr const char* kIdActivateArrange = "CEREBELLUM_REASAMPLER_VIEW_ACTIVATE_ARRANGE";
constexpr const char* kIdActivateDesign = "CEREBELLUM_REASAMPLER_VIEW_ACTIVATE_DESIGN";
constexpr const char* kIdTagDesign = "CEREBELLUM_REASAMPLER_VIEW_TAG_DESIGN";
constexpr const char* kIdTagArrange = "CEREBELLUM_REASAMPLER_VIEW_TAG_ARRANGE";
constexpr const char* kIdUntag = "CEREBELLUM_REASAMPLER_VIEW_UNTAG";
constexpr const char* kIdShowBoth = "CEREBELLUM_REASAMPLER_VIEW_SHOW_BOTH";
// The live session the actions mutate. Set once by designViewRegisterActions and
// read by the hookcommand handler. Not owned here (main.cpp owns g_session).
ReaSamplerSession* g_session = nullptr;
// Minted command ids (0 until registration succeeds). Compared in the handler.
int g_cmdToggleMode = 0;
int g_cmdActivateArrange = 0;
int g_cmdActivateDesign = 0;
int g_cmdTagDesign = 0;
int g_cmdTagArrange = 0;
int g_cmdUntag = 0;
int g_cmdShowBoth = 0;
// gaccel storage must outlive registration — REAPER holds each pointer until we
// mirror-unregister it. One per action.
gaccel_register_t g_accelToggleMode{};
gaccel_register_t g_accelActivateArrange{};
gaccel_register_t g_accelActivateDesign{};
gaccel_register_t g_accelTagDesign{};
gaccel_register_t g_accelTagArrange{};
gaccel_register_t g_accelUntag{};
gaccel_register_t g_accelShowBoth{};
// Mints a command id from a stable string and registers its gaccel (Actions-list
// entry with `desc`). Returns the command id (0 on failure). The gaccel storage is
// caller-owned and must outlive the module (the file-scope g_accel* above).
int registerAction(reaper_plugin_info_t* rec, const char* stableId,
gaccel_register_t& accel, const char* desc) {
const int cmd = rec->Register("command_id", (void*)stableId);
if (cmd) {
accel.accel.cmd = cmd;
accel.desc = desc;
rec->Register("gaccel", (void*)&accel);
}
return cmd;
}
// Collects the canonical GUID keys of the current track selection. Empty if nothing
// is selected. CountSelectedTracks/GetSelectedTrack ignore the master (SDK), which is
// exactly right — the master is never a tagged leaf.
std::vector<std::string> selectedTrackGuids() {
std::vector<std::string> guids;
const int n = CountSelectedTracks(nullptr); // nullptr = active project
guids.reserve(static_cast<std::size_t>(n < 0 ? 0 : n));
for (int i = 0; i < n; ++i) {
MediaTrack* tr = GetSelectedTrack(nullptr, i);
if (!tr) continue;
std::string g = guidString(tr);
if (!g.empty()) guids.push_back(std::move(g));
}
return guids;
}
// Reapplies the model's CURRENT active mode to the active project so a membership
// mutation takes visible effect immediately (park/unpark/re-derive parents). Called
// after every tag/untag/show-both. `proj = nullptr` -> REAPER's active project.
void reapplyActiveMode() {
applyMode(g_session->view(), g_session->view().activeModeId(), nullptr);
}
// Persists both the bank and the Design-View model to the active project's ext
// state. Called after every state-changing Design View action so the view model
// is not lost across save/close/reopen. Marking the project dirty is correct —
// a Design View mutation is a project-level change the user should be prompted
// to save.
//
// When the membership index is non-empty AND the project is unsaved, we prompt
// the user to Save-As before persisting — mirroring the flow capture uses.
// Gate: if membership is empty (no tracks tagged), skip the prompt entirely;
// saveToActiveProject will no-op for an unsaved project, which is correct.
//
// DAW-ONLY ASSUMPTION: Main_SaveProject(proj, true) opens a Save-As dialog and
// blocks until the user dismisses it. The blocking behaviour and dialog
// appearance can only be confirmed in a running REAPER (same caveat as capture).
void persistViewState() {
if (!g_session->view().membership().empty()) {
// At least one track is tagged — worth persisting. Check whether the
// project is saved and, if not, prompt Save-As so saveToActiveProject
// can write ext state. Mirrors capture's readRppPath idiom exactly.
ReaProject* proj = EnumProjects(-1, nullptr, 0);
if (proj) {
auto readRppPath = [&]() -> std::string {
std::vector<char> buf(4096, '\0');
EnumProjects(-1, buf.data(), static_cast<int>(buf.size()));
return std::string(buf.data());
};
if (readRppPath().empty()) {
// Project is unsaved — prompt Save-As.
Main_SaveProject(proj, true);
// Re-read: still empty means the user cancelled.
if (readRppPath().empty()) {
ShowConsoleMsg(
"ReaSampler: Design View state will not persist until "
"the project is saved.\n");
// The in-session tag state is left as-is — the mode change
// already applied and remains valid for this session.
return;
}
}
}
}
g_session->saveToActiveProject();
}
// -- Action bodies ---------------------------------------------------------
// Toggle: cycle to the next mode in ordinal order (Arrange <-> Design with two
// seeds; scales to cycle-through-all for >2 modes with no change here). applyMode
// itself sets the model's active mode, so we only compute the target and apply.
void doToggleMode() {
const std::string target =
nextModeId(g_session->view().modes(), g_session->view().activeModeId());
if (target.empty()) return; // no modes to cycle to (degenerate)
applyMode(g_session->view(), target, nullptr);
persistViewState();
}
// Direct jump to a named mode. applyMode is a no-op (returns false, no mutation) if
// the id is unregistered, so an absent mode fails safe.
void doActivateMode(const std::string& modeId) {
applyMode(g_session->view(), modeId, nullptr);
persistViewState();
}
// Tag the selection's leaves into `modeId`, then reapply so the change is immediate.
// tag() replaces any prior single-mode membership (a leaf lives in one mode; the
// cross-mode case is show-both), matching the D1 contract.
void doTag(const std::string& modeId) {
for (const std::string& g : selectedTrackGuids())
g_session->view().membership().tag(g, modeId);
reapplyActiveMode();
persistViewState();
}
// Untag the selection entirely (return each to the Arrange default). This is the
// shared body behind both "Untag selected" and "Tag -> Arrange" (Arrange = the
// absence of a tag), so the two actions are the same act by definition.
void doUntag() {
for (const std::string& g : selectedTrackGuids())
g_session->view().membership().untag(g);
reapplyActiveMode();
persistViewState();
}
// Toggle the per-track show-both pin for the selection. Read the CURRENT pin of each
// track and flip it independently (a mixed selection converges toward "all on" then
// "all off" only if uniform; per-track flip is the honest semantics of a toggle on a
// multi-selection). show-both leaves are never parked (D1), so reapply reflects the
// change immediately.
void doShowBoth() {
MembershipIndex& m = g_session->view().membership();
for (const std::string& g : selectedTrackGuids())
m.setShowBoth(g, !m.isShowBoth(g));
reapplyActiveMode();
persistViewState();
}
} // namespace
void designViewRegisterActions(reaper_plugin_info_t* rec, ReaSamplerSession* session) {
g_session = session;
// command_id -> gaccel for each. The single hookcommand that routes these lives
// in main.cpp (one hook per extension); designViewHandleCommand services them.
g_cmdToggleMode = registerAction(rec, kIdToggleMode, g_accelToggleMode,
"ReaSampler: toggle Design View mode");
g_cmdActivateArrange = registerAction(rec, kIdActivateArrange, g_accelActivateArrange,
"ReaSampler: activate mode Arrange");
g_cmdActivateDesign = registerAction(rec, kIdActivateDesign, g_accelActivateDesign,
"ReaSampler: activate mode Design");
g_cmdTagDesign = registerAction(rec, kIdTagDesign, g_accelTagDesign,
"ReaSampler: tag selected tracks -> Design");
g_cmdTagArrange = registerAction(rec, kIdTagArrange, g_accelTagArrange,
"ReaSampler: tag selected tracks -> Arrange");
g_cmdUntag = registerAction(rec, kIdUntag, g_accelUntag,
"ReaSampler: untag selected tracks");
g_cmdShowBoth = registerAction(rec, kIdShowBoth, g_accelShowBoth,
"ReaSampler: show both for selected tracks");
}
bool designViewHandleCommand(int command) {
if (command == 0 || !g_session) return false;
if (command == g_cmdToggleMode) { doToggleMode(); return true; }
if (command == g_cmdActivateArrange) { doActivateMode(kArrangeModeId); return true; }
if (command == g_cmdActivateDesign) { doActivateMode(kDesignModeId); return true; }
if (command == g_cmdTagDesign) { doTag(kDesignModeId); return true; }
// Tag -> Arrange and Untag are the same act (Arrange = the absence of a tag).
if (command == g_cmdTagArrange) { doUntag(); return true; }
if (command == g_cmdUntag) { doUntag(); return true; }
if (command == g_cmdShowBoth) { doShowBoth(); return true; }
return false; // not ours — caller's hookcommand keeps looking
}
void designViewUnregisterActions(reaper_plugin_info_t* rec) {
// Mirror-unregister with '-'-prefixed strings, per the contract's unload rule.
// gaccel first, then the command_id string (reverse of registration order).
rec->Register("-gaccel", (void*)&g_accelShowBoth);
rec->Register("-command_id", (void*)kIdShowBoth);
rec->Register("-gaccel", (void*)&g_accelUntag);
rec->Register("-command_id", (void*)kIdUntag);
rec->Register("-gaccel", (void*)&g_accelTagArrange);
rec->Register("-command_id", (void*)kIdTagArrange);
rec->Register("-gaccel", (void*)&g_accelTagDesign);
rec->Register("-command_id", (void*)kIdTagDesign);
rec->Register("-gaccel", (void*)&g_accelActivateDesign);
rec->Register("-command_id", (void*)kIdActivateDesign);
rec->Register("-gaccel", (void*)&g_accelActivateArrange);
rec->Register("-command_id", (void*)kIdActivateArrange);
rec->Register("-gaccel", (void*)&g_accelToggleMode);
rec->Register("-command_id", (void*)kIdToggleMode);
g_session = nullptr;
}
} // namespace reasampler