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277 lines
12 KiB
C
277 lines
12 KiB
C
/* GDK - The GIMP Drawing Kit
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*
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* gdkclipdrop-win32.h: Private Win32-specific clipboard/DnD object
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*
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* Copyright © 2017 LRN
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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G_BEGIN_DECLS
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#define _gdk_win32_clipdrop_get() (_win32_clipdrop)
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#define _gdk_atom_array_index(a, i) (g_array_index (a, const char *, i))
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#define _gdk_win32_clipdrop_atom(i) (_gdk_atom_array_index (_gdk_win32_clipdrop_get ()->known_atoms, i))
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#define _gdk_cf_array_index(a, i) (g_array_index (a, UINT, i))
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#define _gdk_win32_clipdrop_cf(i) (_gdk_cf_array_index (_gdk_win32_clipdrop_get ()->known_clipboard_formats, i))
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/* Maps GDK contentformats to w32formats or vice versa, depending on the
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* semantics of the array that holds these.
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* Also remembers whether the data needs to be transmuted.
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*/
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typedef struct {
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int w32format;
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/* This is assumed to be an interned string, it will be
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* compared by simply comparing the pointer.
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*/
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const char *contentformat;
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gboolean transmute;
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} GdkWin32ContentFormatPair;
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/* OLE-based DND state */
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typedef enum {
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GDK_WIN32_DND_NONE,
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GDK_WIN32_DND_PENDING,
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GDK_WIN32_DND_DROPPED,
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GDK_WIN32_DND_FAILED,
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GDK_WIN32_DND_DRAGGING,
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} GdkWin32DndState;
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enum _GdkWin32AtomIndex
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{
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/* atoms: properties, targets and types */
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GDK_WIN32_ATOM_INDEX_GDK_SELECTION = 0,
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GDK_WIN32_ATOM_INDEX_CLIPBOARD_MANAGER,
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GDK_WIN32_ATOM_INDEX_WM_TRANSIENT_FOR,
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GDK_WIN32_ATOM_INDEX_TARGETS,
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GDK_WIN32_ATOM_INDEX_DELETE,
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GDK_WIN32_ATOM_INDEX_SAVE_TARGETS,
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GDK_WIN32_ATOM_INDEX_TEXT_PLAIN_UTF8,
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GDK_WIN32_ATOM_INDEX_TEXT_PLAIN,
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GDK_WIN32_ATOM_INDEX_TEXT_URI_LIST,
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GDK_WIN32_ATOM_INDEX_TEXT_HTML,
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GDK_WIN32_ATOM_INDEX_IMAGE_PNG,
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GDK_WIN32_ATOM_INDEX_IMAGE_JPEG,
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GDK_WIN32_ATOM_INDEX_IMAGE_BMP,
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GDK_WIN32_ATOM_INDEX_IMAGE_GIF,
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/* DND selections */
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GDK_WIN32_ATOM_INDEX_LOCAL_DND_SELECTION,
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GDK_WIN32_ATOM_INDEX_DROPFILES_DND,
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GDK_WIN32_ATOM_INDEX_OLE2_DND,
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/* Clipboard formats */
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GDK_WIN32_ATOM_INDEX_PNG,
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GDK_WIN32_ATOM_INDEX_JFIF,
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GDK_WIN32_ATOM_INDEX_GIF,
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GDK_WIN32_ATOM_INDEX_CF_DIB,
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GDK_WIN32_ATOM_INDEX_CFSTR_SHELLIDLIST,
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GDK_WIN32_ATOM_INDEX_CF_TEXT,
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GDK_WIN32_ATOM_INDEX_CF_UNICODETEXT,
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GDK_WIN32_ATOM_INDEX_LAST
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};
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typedef enum _GdkWin32AtomIndex GdkWin32AtomIndex;
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enum _GdkWin32CFIndex
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{
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GDK_WIN32_CF_INDEX_PNG = 0,
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GDK_WIN32_CF_INDEX_JFIF,
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GDK_WIN32_CF_INDEX_GIF,
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GDK_WIN32_CF_INDEX_UNIFORMRESOURCELOCATORW,
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GDK_WIN32_CF_INDEX_CFSTR_SHELLIDLIST,
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GDK_WIN32_CF_INDEX_HTML_FORMAT,
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GDK_WIN32_CF_INDEX_TEXT_HTML,
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GDK_WIN32_CF_INDEX_IMAGE_PNG,
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GDK_WIN32_CF_INDEX_IMAGE_JPEG,
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GDK_WIN32_CF_INDEX_IMAGE_BMP,
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GDK_WIN32_CF_INDEX_IMAGE_GIF,
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GDK_WIN32_CF_INDEX_TEXT_URI_LIST,
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GDK_WIN32_CF_INDEX_TEXT_PLAIN_UTF8,
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GDK_WIN32_CF_INDEX_LAST
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};
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typedef enum _GdkWin32CFIndex GdkWin32CFIndex;
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#define GDK_TYPE_WIN32_CLIPDROP (gdk_win32_clipdrop_get_type ())
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#define GDK_WIN32_CLIPDROP(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), GDK_TYPE_WIN32_CLIPDROP, GdkWin32Clipdrop))
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#define GDK_WIN32_CLIPDROP_CLASS(c) (G_TYPE_CHECK_CLASS_CAST ((c), GDK_TYPE_WIN32_CLIPDROP, GdkWin32ClipdropClass))
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#define GDK_IS_WIN32_CLIPDROP(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), GDK_TYPE_WIN32_CLIPDROP))
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#define GDK_IS_WIN32_CLIPDROP_CLASS(c) (G_TYPE_CHECK_CLASS_TYPE ((c), GDK_TYPE_WIN32_CLIPDROP))
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#define GDK_WIN32_CLIPDROP_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), GDK_TYPE_WIN32_CLIPDROP, GdkWin32ClipdropClass))
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typedef struct _GdkWin32Clipdrop GdkWin32Clipdrop;
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typedef struct _GdkWin32ClipdropClass GdkWin32ClipdropClass;
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typedef BOOL (WINAPI * GetUpdatedClipboardFormatsFunc)(
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_Out_ PUINT lpuiFormats,
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_In_ UINT cFormats,
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_Out_ PUINT pcFormatsOut
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);
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/* This object is just a sink to hold all the clipboard- and dnd-related data
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* that otherwise would be in global variables.
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*/
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struct _GdkWin32Clipdrop
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{
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GObject parent_instance;
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/* interned strings for well-known image formats */
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const char **known_pixbuf_formats;
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int n_known_pixbuf_formats;
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/* GArray of GdkAtoms for various known Selection and DnD strings.
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* Size is guaranteed to be at least GDK_WIN32_ATOM_INDEX_LAST
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*/
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GArray *known_atoms;
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/* GArray of UINTs for various known clipboard formats.
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* Size is guaranteed to be at least GDK_WIN32_CF_INDEX_LAST.
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*/
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GArray *known_clipboard_formats;
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GdkWin32DndState dnd_target_state;
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/* A target-keyed hash table of GArrays of GdkWin32ContentFormatPairs describing compatibility w32formats for a contentformat */
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GHashTable *compatibility_w32formats;
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/* A format-keyed hash table of GArrays of GdkAtoms describing compatibility contentformats for a w32format */
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GHashTable *compatibility_contentformats;
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/* By all rights we should be able to just use this function
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* normally, as our target platform is Vista-or-later.
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* This pointer is manually retrieved only to allow
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* GTK to be compiled with old MinGW versions, which
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* don't have GetUpdatedClipboardFormats in the import libs.
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*/
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GetUpdatedClipboardFormatsFunc GetUpdatedClipboardFormats;
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/* The thread that tries to open the clipboard and then
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* do stuff with it. Since clipboard opening can
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* fail, we split the code into a thread, and let
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* it try to open the clipboard repeatedly until
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* the operation times out.
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*/
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GThread *clipboard_open_thread;
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/* Our primary means of communicating with the thread.
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* The communication is one-way only - the thread replies
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* by just queueing functions to be called in the main
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* thread by using g_idle_add().
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*/
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GAsyncQueue *clipboard_open_thread_queue;
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/* We reply to clipboard render requests via this thing.
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* We can't use messages, since the clipboard thread will
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* stop spinning the message loop while it waits for us
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* to render the data.
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*/
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GAsyncQueue *clipboard_render_queue;
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/* Window handle for the clipboard window that we
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* receive from the clipboard thread. We use that
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* to wake up the clipboard window main loop by
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* posting a message to it.
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*/
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HWND clipboard_window;
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/* The thread that calls DoDragDrop (), which would
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* normally block our main thread, as it runs its own
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* Windows message loop.
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*/
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GThread *dnd_thread;
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DWORD dnd_thread_id;
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/* We reply to the various dnd thread requests via this thing.
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* We can't use messages, since the dnd thread will
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* stop spinning the message loop while it waits for us
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* to come up with a reply.
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*/
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GAsyncQueue *dnd_queue;
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/* This counter is atomically incremented every time
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* the main thread pushes something into the queue,
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* and atomically decremented every time the DnD thread
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* pops something out of it.
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* It can be cheaply atomically checked to see if there's
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* anything in the queue. If there is, then the queue
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* processing (which requires expensice locks) can happen.
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*/
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int dnd_queue_counter;
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/* We don't actually support multiple simultaneous drags,
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* for obvious reasons (though this might change with
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* the advent of multitouch support?), but there may be
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* circumstances where we have two drag contexts at
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* the same time (one of them will grab the cursor
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* and thus cancel the other drag operation, but
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* there will be a point of time when both contexts
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* are out there). Thus we keep them around in this hash table.
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* Key is the context object (which is safe, because the main
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* thread keeps a reference on each one of those), value
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* is a pointer to a GdkWin32DnDThreadDoDragDrop struct,
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* which we can only examine when we're sure that the
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* dnd thread is not active.
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*/
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GHashTable *active_source_drags;
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};
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struct _GdkWin32ClipdropClass
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{
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GObjectClass parent_class;
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};
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GType gdk_win32_clipdrop_get_type (void) G_GNUC_CONST;
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void _gdk_win32_clipdrop_init (void);
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gboolean _gdk_win32_format_uses_hdata (UINT w32format);
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char * _gdk_win32_get_clipboard_format_name (UINT fmt,
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gboolean *is_predefined);
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void _gdk_win32_add_w32format_to_pairs (UINT format,
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GArray *array,
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GdkContentFormatsBuilder *builder);
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int _gdk_win32_add_contentformat_to_pairs (const char *target,
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GArray *array);
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void _gdk_win32_clipboard_default_output_done (GObject *clipboard,
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GAsyncResult *result,
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gpointer user_data);
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gboolean _gdk_win32_transmute_contentformat (const char *from_contentformat,
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UINT to_w32format,
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const guchar *data,
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gsize length,
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guchar **set_data,
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gsize *set_data_length);
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gboolean _gdk_win32_transmute_windows_data (UINT from_w32format,
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const char *to_contentformat,
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HANDLE hdata,
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guchar **set_data,
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gsize *set_data_length);
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gboolean _gdk_win32_store_clipboard_contentformats (GdkClipboard *cb,
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GTask *task,
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GdkContentFormats *contentformats);
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void _gdk_win32_retrieve_clipboard_contentformats (GTask *task,
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GdkContentFormats *contentformats);
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void _gdk_win32_advertise_clipboard_contentformats (GTask *task,
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GdkContentFormats *contentformats);
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