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dynload drag functions
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IoI_xD 2026-07-23 00:34:38 -07:00
commit 9dd96d9cec
3 changed files with 21 additions and 43 deletions
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1
include/Mw/LowLevel.h
View file

@ -206,6 +206,7 @@ struct _MwLLHandler {
void (*focus_out)(MwLL handle, void* data);
void (*clipboard)(MwLL handle, void* data);
void (*dark_theme)(MwLL handle, void* data);
void (*drag_and_drop)(MwLL handle, void* data);
};
struct _MwLLTextDispatchTable {

52
src/backend/gdi.c
View file

@ -13,16 +13,13 @@ typedef struct userdata {
static struct symtbl {
void* lib_dwmapi;
void* shell32lib;
void* ole32lib;
void* urlmonlib;
MwBool has_drag_and_drop;
HRESULT(WINAPI* DwmSetWindowAttribute)(HWND hwnd, DWORD dwAttribute, LPCVOID pvAttribute, DWORD cbAttribute);
UINT(WINAPI* DragQueryFileW)(HDROP hDrop, UINT iFile, LPWSTR lpszFile, UINT cch);
UINT(WINAPI* DragQueryFileA)(HDROP hDrop, UINT iFile, LPSTR lpszFile, UINT cch);
void(WINAPI* ReleaseStgMedium)(LPSTGMEDIUM unnamedParam1);
HRESULT(WINAPI* OleInitialize)(LPVOID pvReserved);
HRESULT(WINAPI* RegisterDragDrop)(HWND hwnd, LPDROPTARGET pDropTarget);
HRESULT(WINAPI* FindMimeFromData)(
LPBC pBC,
LPCWSTR pwzUrl,
@ -32,9 +29,8 @@ static struct symtbl {
DWORD dwMimeFlags,
LPWSTR* ppwzMimeOut,
DWORD dwReserved);
HRESULT (*CoInitializeEx)(
LPVOID pvReserved,
DWORD dwCoInit);
void (*DragAcceptFiles)(HWND hWnd, BOOL fAccept);
void (*DragFinish)(HDROP hDrop);
} wsymtbl;
static int is_plgblt_reliable = 0;
@ -215,15 +211,15 @@ static LRESULT CALLBACK wndproc(HWND hWnd, UINT msg, WPARAM wp, LPARAM lp) {
if(u->ll->common.known_mime_types) {
for(n = 0; n < arrlen(u->ll->common.known_mime_types); n++) {
if(strcmp(mime_type_normal, u->ll->common.known_mime_types[n]) == 0) {
MwDispatchUserHandler(u->ll->common.user, MwNdragAndDropHandler, path_normal);
MwLLDispatch(u->ll, drag_and_drop, path_normal);
}
}
} else {
MwDispatchUserHandler(u->ll->common.user, MwNdragAndDropHandler, path_normal);
MwLLDispatch(u->ll, drag_and_drop, path_normal);
}
}
}
DragFinish(hDrop);
wsymtbl.DragFinish(hDrop);
break;
}
case WM_MOUSEMOVE:
@ -1065,7 +1061,7 @@ static void MwLLClipImpl(MwLL handle, MwRect* rect) {
}
static void MwLLSetupDragAndDropImpl(MwLL handle) {
DragAcceptFiles(handle->gdi.hWnd, TRUE);
wsymtbl.DragAcceptFiles(handle->gdi.hWnd, TRUE);
}
static int MwLLGDICallInitImpl(void) {
@ -1091,9 +1087,6 @@ static int MwLLGDICallInitImpl(void) {
if(!(wsymtbl.shell32lib = LoadLibrary("shell32.dll"))) {
goto dnd_error;
};
if(!(wsymtbl.ole32lib = LoadLibrary("ole32.dll"))) {
goto dnd_error;
};
if(!(wsymtbl.urlmonlib = LoadLibrary("Urlmon.dll"))) {
goto dnd_error;
};
@ -1103,11 +1096,6 @@ static int MwLLGDICallInitImpl(void) {
printf(#x "not found, drag and drop will not be supported"); \
goto dnd_error; \
}
#define OLE32_FUNC(x) \
if(!(wsymtbl.x = (void*)GetProcAddress(wsymtbl.ole32lib, #x))) { \
printf(#x "not found, drag and drop will not be supported"); \
goto dnd_error; \
}
#define URLMON_FUNC(x) \
if(!(wsymtbl.x = (void*)GetProcAddress(wsymtbl.urlmonlib, #x))) { \
printf(#x "not found, drag and drop will not be supported"); \
@ -1116,32 +1104,10 @@ static int MwLLGDICallInitImpl(void) {
SHELL32_FUNC(DragQueryFileW);
SHELL32_FUNC(DragQueryFileA);
OLE32_FUNC(ReleaseStgMedium);
OLE32_FUNC(RegisterDragDrop);
OLE32_FUNC(CoInitializeEx);
SHELL32_FUNC(DragAcceptFiles);
SHELL32_FUNC(DragFinish);
URLMON_FUNC(FindMimeFromData);
hr = wsymtbl.CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
/* The only other error - COM already being initialized - can be ignored */
if(hr == RPC_E_CHANGED_MODE) {
goto no_dnd;
}
if(!SUCCEEDED(hr) && hr != S_FALSE) {
printf("CoInitialize error: %08lx\n", hr);
goto dnd_error;
}
hr = OleInitialize(NULL);
if(!SUCCEEDED(hr)) {
if(hr == RPC_E_CHANGED_MODE) {
no_dnd:
printf("Cannot do drag and drop; Microsoft hates you and if you use COM anywhere else it has to be apartment threaded.\n");
goto dnd_error;
} else {
printf("OleInitialize failed; %08lx. Drag and Drop won't be supported.\n", hr);
goto dnd_error;
}
}
wsymtbl.has_drag_and_drop = MwTRUE;
}
dnd_error:

11
src/core.c
View file

@ -192,6 +192,16 @@ static void llclipboardhandler(MwLL handle, void* data) {
MwDispatchUserHandler(h, MwNclipboardHandler, data);
}
static void lldraganddrophandler(MwLL handle, void* data) {
MwWidget h = (MwWidget)handle->common.user;
const char * p = data;
if(MwGetInteger(h, MwNdisabled) == 1) return;
printf("%s\n",p);
MwDispatchUserHandler(h, MwNdragAndDropHandler, data);
}
/* if both of them are true
* 1. widget class is not NULL
* 2. parent is NULL
@ -285,6 +295,7 @@ static MwWidget MwCreateWidget_Internal(MwClass widget_class, const char* name,
h->lowlevel->common.handler->focus_out = llfocusouthandler;
h->lowlevel->common.handler->clipboard = llclipboardhandler;
h->lowlevel->common.handler->dark_theme = lldarkthemehandler;
h->lowlevel->common.handler->drag_and_drop = lldraganddrophandler;
}
if(parent != NULL) arrput(parent->children, h);