daniel
b71a05fbef
OsHandoff now needs the window-ownership proof AND a hit-test that named nothing, so a bridged plugin's UI can't read as off-REAPER.
48 lines
2.8 KiB
C++
48 lines
2.8 KiB
C++
#pragma once
|
|
// drag_out_win — the host/OS boundary of native OS drag-out: whether the pointer has
|
|
// crossed it, whether the OS is ready to take the drag, and the hand-off itself, which
|
|
// gives a resolved existing-file path list to the OS's drag-drop machinery so the user can
|
|
// drop bank samples into Explorer / another app / another DAW. The pure gesture-boundary
|
|
// decision + path-list assembly live in drag_out.*.
|
|
//
|
|
// COPY-ONLY is STRUCTURAL on Windows: DoDragDrop's effect mask is DROPEFFECT_COPY
|
|
// alone — MOVE is never offered, so no target can pull a file out of the bank folder
|
|
// (only prune deletes bank bytes). macOS/Linux route through SWELL's file-list drag,
|
|
// which exposes no per-source effect mask, so there the copy-only guarantee rests on
|
|
// SWELL's copy semantics rather than an explicit mask.
|
|
//
|
|
// NON-DESTRUCTIVE: initiating a drag reads nothing but the path list; a cancelled or
|
|
// failed drag mutates no sample/index/selection.
|
|
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
struct HWND__; // avoid dragging windows.h into every includer; the shell casts as needed.
|
|
|
|
namespace reasampler {
|
|
|
|
// `absolutePaths` must already be resolved/existing/de-duped (drag_out::assemblePathList
|
|
// output). No-op when empty. BLOCKING on Windows: OLE DoDragDrop runs its own modal
|
|
// message loop until drop/cancel. Returns true iff the drop was accepted
|
|
// (DROPEFFECT_COPY); the return is advisory — a failed drag surfaces no error.
|
|
bool initiateDragOut(HWND__* panelHwnd, const std::vector<std::string>& absolutePaths);
|
|
|
|
// Side-effect-free readiness probe for initiateDragOut. Call BEFORE tearing down internal drag
|
|
// state — an OS that isn't ready (OLE unavailable, HDROP build failure) must not consume the
|
|
// gesture like an empty payload would. Windows re-runs the OLE-init + HDROP checks and frees the
|
|
// probe HGLOBAL immediately; SWELL exposes no probe, so macOS/Linux reduces to the non-empty check.
|
|
bool canInitiateDragOut(const std::vector<std::string>& absolutePaths);
|
|
|
|
// True iff a window belonging to the host (REAPER) process sits under the screen point — the
|
|
// POSITIVE proof ui::DropContext::pointerOffHost is the negation of (that member owns the
|
|
// evidence rule). Nearly every REAPER surface qualifies whether or not GetThingFromPoint can
|
|
// name it, because the extension runs inside that process.
|
|
// The exception, and it ships: a plugin set to "Run as separate/dedicated process" draws its
|
|
// UI out of reaper_host32/64.exe, and WindowFromPoint descends to the deepest child — so this
|
|
// reports false over a bridged plugin's editor although the pointer never left REAPER. The
|
|
// law's hand-off gate absorbs that by also requiring REAPER's own hit-test to name nothing.
|
|
// Side-effect-free; safe on every mouse-move.
|
|
bool pointerOverHostWindow(int screenX, int screenY);
|
|
|
|
} // namespace reasampler
|