xwin.c

LInux 下的远程桌面工具 Rdesktop

					green_weight = vis_green_weight;
					blue_weight = vis_blue_weight;
					g_visual = visual_info->visual;
					g_depth = visual_info->depth;
				}
			}
		}
		XFree(vmatches);
	}

	if (g_visual != NULL)
	{
		g_owncolmap = False;
		calculate_shifts(g_visual->red_mask, &g_red_shift_r, &g_red_shift_l);
		calculate_shifts(g_visual->green_mask, &g_green_shift_r, &g_green_shift_l);
		calculate_shifts(g_visual->blue_mask, &g_blue_shift_r, &g_blue_shift_l);
	}
	else
	{
		template.class = PseudoColor;
		template.depth = 8;
		template.colormap_size = 256;
		vmatches =
			XGetVisualInfo(g_display,
				       VisualClassMask | VisualDepthMask | VisualColormapSizeMask,
				       &template, &visuals_count);
		if (vmatches == NULL)
		{
			error("No usable TrueColor or PseudoColor visuals on this display.\n");
			XCloseDisplay(g_display);
			XFree(pfm);
			return False;
		}

		/* we use a colourmap, so the default visual should do */
		g_owncolmap = True;
		g_visual = vmatches[0].visual;
		g_depth = vmatches[0].depth;
	}

	g_bpp = 0;
	for (i = 0; i < pixmap_formats_count; ++i)
	{
		XPixmapFormatValues *pf = &pfm[i];
		if (pf->depth == g_depth)
		{
			g_bpp = pf->bits_per_pixel;

			if (g_no_translate_image)
			{
				switch (g_server_depth)
				{
					case 15:
					case 16:
						if (g_bpp != 16)
							g_no_translate_image = False;
						break;
					case 24:
						/* Yes, this will force image translation
						   on most modern servers which use 32 bits
						   for R8G8B8. */
						if (g_bpp != 24)
							g_no_translate_image = False;
						break;
					default:
						g_no_translate_image = False;
						break;
				}
			}

			/* Pixmap formats list is a depth-to-bpp mapping --
			   there's just a single entry for every depth,
			   so we can safely break here */
			break;
		}
	}
	XFree(pfm);
	pfm = NULL;
	return True;
}

static XErrorHandler g_old_error_handler;
static RD_BOOL g_error_expected = False;

/* Check if the X11 window corresponding to a seamless window with
   specified id exists. */
RD_BOOL
sw_window_exists(unsigned long id)
{
	seamless_window *sw;
	char *name;
	Status sts = 0;

	sw = sw_get_window_by_id(id);
	if (!sw)
		return False;

	g_error_expected = True;
	sts = XFetchName(g_display, sw->wnd, &name);
	g_error_expected = False;
	if (sts)
	{
		XFree(name);
	}

	return sts;
}

static int
error_handler(Display * dpy, XErrorEvent * eev)
{
	if (g_error_expected)
		return 0;

	return g_old_error_handler(dpy, eev);
}

RD_BOOL
ui_init(void)
{
	int screen_num;

	g_display = XOpenDisplay(NULL);
	if (g_display == NULL)
	{
		error("Failed to open display: %s\n", XDisplayName(NULL));
		return False;
	}

	{
		uint16 endianess_test = 1;
		g_host_be = !(RD_BOOL) (*(uint8 *) (&endianess_test));
	}

	g_old_error_handler = XSetErrorHandler(error_handler);
	g_xserver_be = (ImageByteOrder(g_display) == MSBFirst);
	screen_num = DefaultScreen(g_display);
	g_x_socket = ConnectionNumber(g_display);
	g_screen = ScreenOfDisplay(g_display, screen_num);
	g_depth = DefaultDepthOfScreen(g_screen);

	if (!select_visual(screen_num))
		return False;

	if (g_no_translate_image)
	{
		DEBUG(("Performance optimization possible: avoiding image translation (colour depth conversion).\n"));
	}

	if (g_server_depth > g_bpp)
	{
		warning("Remote desktop colour depth %d higher than display colour depth %d.\n",
			g_server_depth, g_bpp);
	}

	DEBUG(("RDP depth: %d, display depth: %d, display bpp: %d, X server BE: %d, host BE: %d\n",
	       g_server_depth, g_depth, g_bpp, g_xserver_be, g_host_be));

	if (!g_owncolmap)
	{
		g_xcolmap =
			XCreateColormap(g_display, RootWindowOfScreen(g_screen), g_visual,
					AllocNone);
		if (g_depth <= 8)
			warning("Display colour depth is %d bit: you may want to use -C for a private colourmap.\n", g_depth);
	}

	if ((!g_ownbackstore) && (DoesBackingStore(g_screen) != Always))
	{
		warning("External BackingStore not available. Using internal.\n");
		g_ownbackstore = True;
	}

	/*
	 * Determine desktop size
	 */
	if (g_fullscreen)
	{
		g_width = WidthOfScreen(g_screen);
		g_height = HeightOfScreen(g_screen);
		g_using_full_workarea = True;
	}
	else if (g_width < 0)
	{
		/* Percent of screen */
		if (-g_width >= 100)
			g_using_full_workarea = True;
		g_height = HeightOfScreen(g_screen) * (-g_width) / 100;
		g_width = WidthOfScreen(g_screen) * (-g_width) / 100;
	}
	else if (g_width == 0)
	{
		/* Fetch geometry from _NET_WORKAREA */
		uint32 x, y, cx, cy;
		if (get_current_workarea(&x, &y, &cx, &cy) == 0)
		{
			g_width = cx;
			g_height = cy;
			g_using_full_workarea = True;
		}
		else
		{
			warning("Failed to get workarea: probably your window manager does not support extended hints\n");
			g_width = WidthOfScreen(g_screen);
			g_height = HeightOfScreen(g_screen);
		}
	}

	/* make sure width is a multiple of 4 */
	g_width = (g_width + 3) & ~3;

	g_mod_map = XGetModifierMapping(g_display);
	xwin_refresh_pointer_map();

	xkeymap_init();

	if (g_enable_compose)
		g_IM = XOpenIM(g_display, NULL, NULL, NULL);

	xclip_init();
	ewmh_init();
	if (g_seamless_rdp)
	{
		seamless_init();
	}

	DEBUG_RDP5(("server bpp %d client bpp %d depth %d\n", g_server_depth, g_bpp, g_depth));

	return True;
}

void
ui_deinit(void)
{
	while (g_seamless_windows)
	{
		XDestroyWindow(g_display, g_seamless_windows->wnd);
		sw_remove_window(g_seamless_windows);
	}

	xclip_deinit();

	if (g_IM != NULL)
		XCloseIM(g_IM);

	if (g_null_cursor != NULL)
		ui_destroy_cursor(g_null_cursor);

	XFreeModifiermap(g_mod_map);

	if (g_ownbackstore)
		XFreePixmap(g_display, g_backstore);

	XFreeGC(g_display, g_gc);
	XCloseDisplay(g_display);
	g_display = NULL;
}


static void
get_window_attribs(XSetWindowAttributes * attribs)
{
	attribs->background_pixel = BlackPixelOfScreen(g_screen);
	attribs->background_pixel = WhitePixelOfScreen(g_screen);
	attribs->border_pixel = WhitePixelOfScreen(g_screen);
	attribs->backing_store = g_ownbackstore ? NotUseful : Always;
	attribs->override_redirect = g_fullscreen;
	attribs->colormap = g_xcolmap;
}

static void
get_input_mask(long *input_mask)
{
	*input_mask = KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask |
		VisibilityChangeMask | FocusChangeMask | StructureNotifyMask;

	if (g_sendmotion)
		*input_mask |= PointerMotionMask;
	if (g_ownbackstore)
		*input_mask |= ExposureMask;
	if (g_fullscreen || g_grab_keyboard)
		*input_mask |= EnterWindowMask;
	if (g_grab_keyboard)
		*input_mask |= LeaveWindowMask;
}

RD_BOOL
ui_create_window(void)
{
	uint8 null_pointer_mask[1] = { 0x80 };
	uint8 null_pointer_data[24] = { 0x00 };

	XSetWindowAttributes attribs;
	XClassHint *classhints;
	XSizeHints *sizehints;
	int wndwidth, wndheight;
	long input_mask, ic_input_mask;
	XEvent xevent;

	wndwidth = g_fullscreen ? WidthOfScreen(g_screen) : g_width;
	wndheight = g_fullscreen ? HeightOfScreen(g_screen) : g_height;

	/* Handle -x-y portion of geometry string */
	if (g_xpos < 0 || (g_xpos == 0 && (g_pos & 2)))
		g_xpos = WidthOfScreen(g_screen) + g_xpos - g_width;
	if (g_ypos < 0 || (g_ypos == 0 && (g_pos & 4)))
		g_ypos = HeightOfScreen(g_screen) + g_ypos - g_height;

	get_window_attribs(&attribs);

	g_wnd = XCreateWindow(g_display, RootWindowOfScreen(g_screen), g_xpos, g_ypos, wndwidth,
			      wndheight, 0, g_depth, InputOutput, g_visual,
			      CWBackPixel | CWBackingStore | CWOverrideRedirect | CWColormap |
			      CWBorderPixel, &attribs);

	if (g_gc == NULL)
	{
		g_gc = XCreateGC(g_display, g_wnd, 0, NULL);
		ui_reset_clip();
	}

	if (g_create_bitmap_gc == NULL)
		g_create_bitmap_gc = XCreateGC(g_display, g_wnd, 0, NULL);

	if ((g_ownbackstore) && (g_backstore == 0))
	{
		g_backstore = XCreatePixmap(g_display, g_wnd, g_width, g_height, g_depth);

		/* clear to prevent rubbish being exposed at startup */
		XSetForeground(g_display, g_gc, BlackPixelOfScreen(g_screen));
		XFillRectangle(g_display, g_backstore, g_gc, 0, 0, g_width, g_height);
	}

	XStoreName(g_display, g_wnd, g_title);
	ewmh_set_wm_name(g_wnd, g_title);

	if (g_hide_decorations)
		mwm_hide_decorations(g_wnd);

	classhints = XAllocClassHint();
	if (classhints != NULL)
	{
		classhints->res_name = classhints->res_class = "rdesktop";
		XSetClassHint(g_display, g_wnd, classhints);
		XFree(classhints);
	}

	sizehints = XAllocSizeHints();
	if (sizehints)
	{
		sizehints->flags = PMinSize | PMaxSize;
		if (g_pos)
			sizehints->flags |= PPosition;
		sizehints->min_width = sizehints->max_width = g_width;
		sizehints->min_height = sizehints->max_height = g_height;
		XSetWMNormalHints(g_display, g_wnd, sizehints);
		XFree(sizehints);
	}

	if (g_embed_wnd)
	{
		XReparentWindow(g_display, g_wnd, (Window) g_embed_wnd, 0, 0);
	}

	get_input_mask(&input_mask);

	if (g_IM != NULL)
	{
		g_IC = XCreateIC(g_IM, XNInputStyle, (XIMPreeditNothing | XIMStatusNothing),
				 XNClientWindow, g_wnd, XNFocusWindow, g_wnd, NULL);

		if ((g_IC != NULL)
		    && (XGetICValues(g_IC, XNFilterEvents, &ic_input_mask, NULL) == NULL))
			input_mask |= ic_input_mask;
	}

	XSelectInput(g_display, g_wnd, input_mask);
	XMapWindow(g_display, g_wnd);

	/* wait for VisibilityNotify */
	do
	{
		XMaskEvent(g_display, VisibilityChangeMask, &xevent);
	}
	while (xevent.type != VisibilityNotify);
	g_Unobscured = xevent.xvisibility.state == VisibilityUnobscured;

	g_focused = False;
	g_mouse_in_wnd = False;

	/* handle the WM_DELETE_WINDOW protocol */
	g_protocol_atom = XInternAtom(g_display, "WM_PROTOCOLS", True);
	g_kill_atom = XInternAtom(g_display, "WM_DELETE_WINDOW", True);
	XSetWMProtocols(g_display, g_wnd, &g_kill_atom, 1);

	/* create invisible 1x1 cursor to be used as null cursor */
	if (g_null_cursor == NULL)
		g_null_cursor = ui_create_cursor(0, 0, 1, 1, null_pointer_mask, null_pointer_data);

	if (g_seamless_rdp)
	{
		seamless_restack_test();
	}

	return True;
}

void
ui_resize_window()
{
	XSizeHints *sizehints;
	Pixmap bs;

	sizehints = XAllocSizeHints();
	if (sizehints)
	{
		sizehints->flags = PMinSize | PMaxSize;
		sizehints->min_width = sizehints->max_width = g_width;
		sizehints->min_height = sizehints->max_height = g_height;
		XSetWMNormalHints(g_display, g_wnd, sizehints);
		XFree(sizehints);
	}

	if (!(g_fullscreen || g_embed_wnd))
	{
		XResizeWindow(g_display, g_wnd, g_width, g_height);
	}

	/* create new backstore pixmap */
	if (g_backstore != 0)
	{
		bs = XCreatePixmap(g_display, g_wnd, g_width, g_height, g_depth);
		XSetForeground(g_display, g_gc, BlackPixelOfScreen(g_screen));
		XFillRectangle(g_display, bs, g_gc, 0, 0, g_width, g_height);
		XCopyArea(g_display, g_backstore, bs, g_gc, 0, 0, g_width, g_height, 0, 0);
		XFreePixmap(g_display, g_backstore);
		g_backstore = bs;
	}
}

void
ui_destroy_window(void)
{
	if (g_IC != NULL)
		XDestroyIC(g_IC);

	XDestroyWindow(g_display, g_wnd);
}

void
xwin_toggle_fullscreen(void)
{
	Pixmap contents = 0;

	if (g_seamless_active)
		/* Turn off SeamlessRDP mode */
		ui_seamless_toggle();

	if (!g_ownbackstore)
	{
		/* need to save contents of window */
		contents = XCreatePixmap(g_display, g_wnd, g_width, g_height, g_depth);
		XCopyArea(g_display, g_wnd, contents, g_gc, 0, 0, g_width, g_height, 0, 0);
	}

	ui_destroy_window();
	g_fullscreen = !g_fullscreen;
	ui_create_window();

	XDefineCursor(g_display, g_wnd, g_current_cursor);

	if (!g_ownbackstore)
	{
		XCopyArea(g_display, contents, g_wnd, g_gc, 0, 0, g_width, g_height, 0, 0);
		XFreePixmap(g_display, contents);
	}
}

static void
handle_button_event(XEvent xevent, RD_BOOL down)
{
	uint16 button, flags = 0;
	g_last_gesturetime = xevent.xbutton.time;
	/* Reverse the pointer button mapping, e.g. in the case of
	   "left-handed mouse mode"; the RDP session expects to
	   receive physical buttons (true in mstsc as well) and
	   logical button behavior depends on the remote desktop's own
	   mouse settings */
	xevent.xbutton.button = g_pointer_log_to_phys_map[xevent.xbutton.button - 1];
	button = xkeymap_translate_button(xevent.xbutton.button);
	if (button == 0)
		return;

	if (down)
		flags = MOUSE_FLAG_DOWN;

	/* Stop moving window when button is released, regardless of cursor position */
	if (g_moving_wnd && (xevent.type == ButtonRelease))
		g_moving_wnd = False;

	/* If win_button_size is nonzero, enable single app mode */
	if (xevent.xbutton.y < g_win_button_size)
	{
		/*  Check from right to left: */
		if (xevent.xbutton.x >= g_width - g_win_button_size)
		{
			/* The close button, continue */
			;
		}
		else if (xevent.xbutton.x >= g_width - g_win_button_size * 2)
		{
			/* The maximize/restore button. Do not send to
			   server.  It might be a good idea to change the
			   cursor or give some other visible indication
			   that rdesktop inhibited this click */
			if (xevent.type == ButtonPress)
				return;
		}
		else if (xevent.xbutton.x >= g_width - g_win_button_size * 3)
		{
			/* The minimize button. Iconify window. */
			if (xevent.type == ButtonRelease)
			{
				/* Release the mouse button outside the minimize button, to prevent the
				   actual minimazation to happen */
				rdp_send_input(time(NULL), RDP_INPUT_MOUSE, button, 1, 1);
				XIconifyWindow(g_display, g_wnd, DefaultScreen(g_display));
				return;
			}
		}
		else if (xevent.xbutton.x <= g_win_button_size)
		{
			/* The system menu. Ignore. */
			if (xevent.type == ButtonPress)
				return;
		}
		else
		{
			/* The title bar. */
			if (xevent.type == ButtonPress)
			{
				if (!g_fullscreen && g_hide_decorations && !g_using_full_workarea)
				{
					g_moving_wnd = True;
					g_move_x_offset = xevent.xbutton.x;
					g_move_y_offset = xevent.xbutton.y;
				}
				return;
			}
		}
	}

	if (xevent.xmotion.window == g_wnd)
	{
		rdp_send_input(time(NULL), RDP_INPUT_MOUSE,
			       flags | button, xevent.xbutton.x, xevent.xbutton.y);
	}
	else
	{
		/* SeamlessRDP */
		rdp_send_input(time(NULL), RDP_INPUT_MOUSE,
			       flags | button, xevent.xbutton.x_root, xevent.xbutton.y_root);
	}
}


/* Process events in Xlib queue
   Returns 0 after user quit, 1 otherwise */