/**
* FreeRDP: A Remote Desktop Protocol Implementation
* Event Handling
*
* Copyright 2009-2011 Jay Sorg
* Copyright 2010-2011 Vic Lee
* Copyright 2010-2011 Marc-Andre Moreau <marcandre.moreau@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <freerdp/freerdp.h>
#include "wf_client.h"
#include "wf_gdi.h"
#include "wf_event.h"
#include <freerdp/event.h>
static HWND g_focus_hWnd;
#define X_POS(lParam) ((UINT16)(lParam & 0xFFFF))
#define Y_POS(lParam) ((UINT16)((lParam >> 16) & 0xFFFF))
static BOOL wf_scale_blt(wfContext* wfc, HDC hdc, int x, int y, int w, int h, HDC hdcSrc, int x1,
int y1, DWORD rop);
static BOOL wf_scale_mouse_event(wfContext* wfc, rdpInput* input, UINT16 flags, UINT16 x, UINT16 y);
#if (_WIN32_WINNT >= 0x0500)
static BOOL wf_scale_mouse_event_ex(wfContext* wfc, rdpInput* input, UINT16 flags,
UINT16 buttonMask, UINT16 x, UINT16 y);
#endif
static BOOL g_flipping_in;
static BOOL g_flipping_out;
static BOOL alt_ctrl_down()
{
return ((GetAsyncKeyState(VK_CONTROL) & 0x8000) || (GetAsyncKeyState(VK_MENU) & 0x8000));
}
LRESULT CALLBACK wf_ll_kbd_proc(int nCode, WPARAM wParam, LPARAM lParam)
{
wfContext* wfc;
DWORD rdp_scancode;
rdpInput* input;
PKBDLLHOOKSTRUCT p;
DEBUG_KBD("Low-level keyboard hook, hWnd %X nCode %X wParam %X", g_focus_hWnd, nCode, wParam);
if (g_flipping_in)
{
if (!alt_ctrl_down())
g_flipping_in = FALSE;
return CallNextHookEx(NULL, nCode, wParam, lParam);
}
if (g_focus_hWnd && (nCode == HC_ACTION))
{
switch (wParam)
{
case WM_KEYDOWN:
case WM_SYSKEYDOWN:
case WM_KEYUP:
case WM_SYSKEYUP:
wfc = (wfContext*)GetWindowLongPtr(g_focus_hWnd, GWLP_USERDATA);
p = (PKBDLLHOOKSTRUCT)lParam;
if (!wfc || !p)
return 1;
input = wfc->context.input;
rdp_scancode = MAKE_RDP_SCANCODE((BYTE)p->scanCode, p->flags & LLKHF_EXTENDED);
DEBUG_KBD("keydown %d scanCode 0x%08lX flags 0x%08lX vkCode 0x%08lX",
(wParam == WM_KEYDOWN), p->scanCode, p->flags, p->vkCode);
if (wfc->fullscreen_toggle &&
((p->vkCode == VK_RETURN) || (p->vkCode == VK_CANCEL)) &&
(GetAsyncKeyState(VK_CONTROL) & 0x8000) &&
(GetAsyncKeyState(VK_MENU) & 0x8000)) /* could also use flags & LLKHF_ALTDOWN */
{
if (wParam == WM_KEYDOWN)
{
wf_toggle_fullscreen(wfc);
return 1;
}
}
if (rdp_scancode == RDP_SCANCODE_NUMLOCK_EXTENDED)
{
/* Windows sends NumLock as extended - rdp doesn't */
DEBUG_KBD("hack: NumLock (x45) should not be extended");
rdp_scancode = RDP_SCANCODE_NUMLOCK;
}
else if (rdp_scancode == RDP_SCANCODE_NUMLOCK)
{
/* Windows sends Pause as if it was a RDP NumLock (handled above).
* It must however be sent as a one-shot Ctrl+NumLock */
if (wParam == WM_KEYDOWN)
{
DEBUG_KBD("Pause, sent as Ctrl+NumLock");
freerdp_input_send_keyboard_event_ex(input, TRUE, RDP_SCANCODE_LCONTROL);
freerdp_input_send_keyboard_event_ex(input, TRUE, RDP_SCANCODE_NUMLOCK);
freerdp_input_send_keyboard_event_ex(input, FALSE, RDP_SCANCODE_LCONTROL);
freerdp_input_send_keyboard_event_ex(input, FALSE, RDP_SCANCODE_NUMLOCK);
}
else
{
DEBUG_KBD("Pause up");
}
return 1;
}
else if (rdp_scancode == RDP_SCANCODE_RSHIFT_EXTENDED)
{
DEBUG_KBD("right shift (x36) should not be extended");
rdp_scancode = RDP_SCANCODE_RSHIFT;
}
freerdp_input_send_keyboard_event_ex(input, !(p->flags & LLKHF_UP), rdp_scancode);
if (p->vkCode == VK_NUMLOCK || p->vkCode == VK_CAPITAL || p->vkCode == VK_SCROLL ||
p->vkCode == VK_KANA)
DEBUG_KBD(
"lock keys are processed on client side too to toggle their indicators");
else
return 1;
break;
}
}
if (g_flipping_out)
{
if (!alt_ctrl_down())
{
g_flipping_out = FALSE;
g_focus_hWnd = NULL;
}
}
return CallNextHookEx(NULL, nCode, wParam, lParam);
}
void wf_event_focus_in(wfContext* wfc)
{
UINT16 syncFlags;
rdpInput* input;
POINT pt;
RECT rc;
input = wfc->context.input;
syncFlags = 0;
if (GetKeyState(VK_NUMLOCK))
syncFlags |= KBD_SYNC_NUM_LOCK;
if (GetKeyState(VK_CAPITAL))
syncFlags |= KBD_SYNC_CAPS_LOCK;
if (GetKeyState(VK_SCROLL))
syncFlags |= KBD_SYNC_SCROLL_LOCK;
if (GetKeyState(VK_KANA))
syncFlags |= KBD_SYNC_KANA_LOCK;
input->FocusInEvent(input, syncFlags);
/* send pointer position if the cursor is currently inside our client area */
GetCursorPos(&pt);
ScreenToClient(wfc->hwnd, &pt);
GetClientRect(wfc->hwnd, &rc);
if (pt.x >= rc.left && pt.x < rc.right && pt.y >= rc.top && pt.y < rc.bottom)
input->MouseEvent(input, PTR_FLAGS_MOVE, (UINT16)pt.x, (UINT16)pt.y);
}
static BOOL wf_event_process_WM_MOUSEWHEEL(wfContext* wfc, HWND hWnd, UINT Msg, WPARAM wParam,
LPARAM lParam, BOOL horizontal, UINT16 x, UINT16 y)
{
int delta;
UINT16 flags = 0;
rdpInput* input;
DefWindowProc(hWnd, Msg, wParam, lParam);
input = wfc->context.input;
delta = ((signed short)HIWORD(wParam)); /* GET_WHEEL_DELTA_WPARAM(wParam); */
if (horizontal)
flags |= PTR_FLAGS_HWHEEL;
else
flags |= PTR_FLAGS_WHEEL;
if (delta < 0)
{
flags |= PTR_FLAGS_WHEEL_NEGATIVE;
delta = -delta;
}
flags |= delta;
return wf_scale_mouse_event(wfc, input, flags, x, y);
}
static void wf_sizing(wfContext* wfc, WPARAM wParam, LPARAM lParam)
{
rdpSettings* settings = wfc->context.settings;
// Holding the CTRL key down while resizing the window will force the desktop aspect ratio.
LPRECT rect;
if (settings->SmartSizing && (GetAsyncKeyState(VK_CONTROL) & 0x8000))
{
rect = (LPRECT)wParam;
switch (lParam)
{
case WMSZ_LEFT:
case WMSZ_RIGHT:
case WMSZ_BOTTOMRIGHT:
// Adjust height
rect->bottom = rect->top + settings->DesktopHeight * (rect->right - rect->left) /
settings->DesktopWidth;
break;
case WMSZ_TOP:
case WMSZ_BOTTOM:
case WMSZ_TOPRIGHT:
// Adjust width
rect->right = rect->left + settings->DesktopWidth * (rect->bottom - rect->top) /
settings->DesktopHeight;
break;
case WMSZ_BOTTOMLEFT:
case WMSZ_TOPLEFT:
// adjust width
rect->left = rect->right - (settings->DesktopWidth * (rect->bottom - rect->top) /
settings->DesktopHeight);
break;
}
}
}
LRESULT CALLBACK wf_event_proc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
HDC hdc;
LONG_PTR ptr;
wfContext* wfc;
int x, y, w, h;
PAINTSTRUCT ps;
BOOL processed;
RECT windowRect;
MINMAXINFO* minmax;
SCROLLINFO si;
processed = TRUE;
ptr = GetWindowLongPtr(hWnd, GWLP_USERDATA);
wfc = (wfContext*)ptr;
if (wfc != NULL)
{
rdpInput* input = wfc->context.input;
rdpSettings* settings = wfc->context.settings;
switch (Msg)
{
case WM_MOVE:
if (!wfc->disablewindowtracking)
{
int x = (int)(short)LOWORD(lParam);
int y = (int)(short)HIWORD(lParam);
wfc->client_x = x;
wfc->client_y = y;
}
break;
case WM_GETMINMAXINFO:
if (wfc->context.settings->SmartSizing)
{
processed = FALSE;
}
else
{
// Set maximum window size for resizing
minmax = (MINMAXINFO*)lParam;
// always use the last determined canvas diff, because it could be
// that the window is minimized when this gets called
// wf_update_canvas_diff(wfc);
if (!wfc->fullscreen)
{
// add window decoration
minmax->ptMaxTrackSize.x = settings->DesktopWidth + wfc->diff.x;
minmax->ptMaxTrackSize.y = settings->DesktopHeight + wfc->diff.y;
}
}
break;
case WM_SIZING:
wf_sizing(wfc, lParam, wParam);
break;
case WM_SIZE:
GetWindowRect(wfc->hwnd, &windowRect);
if (!wfc->fullscreen)
{
wfc->client_width = LOWORD(lParam);
wfc->client_height = HIWORD(lParam);
wfc->client_x = windowRect.left;
wfc->client_y = windowRect.top;
}
if (wfc->client_width && wfc->client_height)
{
wf_size_scrollbars(wfc, LOWORD(lParam), HIWORD(lParam));
// Workaround: when the window is maximized, the call to "ShowScrollBars"
// returns TRUE but has no effect.
if (wParam == SIZE_MAXIMIZED && !wfc->fullscreen)
SetWindowPos(wfc->hwnd, HWND_TOP, 0, 0, windowRect.right - windowRect.left,
windowRect.bottom - windowRect.top,
SWP_NOMOVE | SWP_FRAMECHANGED);
}
break;
case WM_EXITSIZEMOVE:
wf_size_scrollbars(wfc, wfc->client_width, wfc->client_height);
break;
case WM_ERASEBKGND:
/* Say we handled it - prevents flickering */
return (LRESULT)1;
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
x = ps.rcPaint.left;
y = ps.rcPaint.top;
w = ps.rcPaint.right - ps.rcPaint.left + 1;
h = ps.rcPaint.bottom - ps.rcPaint.top + 1;
wf_scale_blt(wfc, hdc, x, y, w, h, wfc->primary->hdc,
x - wfc->offset_x + wfc->xCurrentScroll,
y - wfc->offset_y + wfc->yCurrentScroll, SRCCOPY);
EndPaint(hWnd, &ps);
break;
#if (_WIN32_WINNT >= 0x0500)
case WM_XBUTTONDOWN:
wf_scale_mouse_event_ex(wfc, input, PTR_XFLAGS_DOWN, GET_XBUTTON_WPARAM(wParam),
X_POS(lParam) - wfc->offset_x,
Y_POS(lParam) - wfc->offset_y);
break;
case WM_XBUTTONUP:
wf_scale_mouse_event_ex(wfc, input, 0, GET_XBUTTON_WPARAM(wParam),
X_POS(lParam) - wfc->offset_x,
Y_POS(lParam) - wfc->offset_y);
break;
#endif
case WM_MBUTTONDOWN:
wf_scale_mouse_event(wfc, input, PTR_FLAGS_DOWN | PTR_FLAGS_BUTTON3,
X_POS(lParam) - wfc->offset_x, Y_POS(lParam) - wfc->offset_y);
break;
case WM_MBUTTONUP:
wf_scale_mouse_event(wfc, input, PTR_FLAGS_BUTTON3, X_POS(lParam) - wfc->offset_x,
Y_POS(lParam) - wfc->offset_y);
break;
case WM_LBUTTONDOWN:
wf_scale_mouse_event(wfc, input, PTR_FLAGS_DOWN | PTR_FLAGS_BUTTON1,
X_POS(lParam) - wfc->offset_x, Y_POS(lParam) - wfc->offset_y);
break;
case WM_LBUTTONUP:
wf_scale_mouse_event(wfc, input, PTR_FLAGS_BUTTON1, X_POS(lParam) - wfc->offset_x,
Y_POS(lParam) - wfc->offset_y);
break;
case WM_RBUTTONDOWN:
wf_scale_mouse_event(wfc, input, PTR_FLAGS_DOWN | PTR_FLAGS_BUTTON2,
X_POS(lParam) - wfc->offset_x, Y_POS(lParam) - wfc->offset_y);
break;
case WM_RBUTTONUP:
wf_scale_mouse_event(wfc, input, PTR_FLAGS_BUTTON2, X_POS(lParam) - wfc->offset_x,
Y_POS(lParam) - wfc->offset_y);
break;
case WM_MOUSEMOVE:
wf_scale_mouse_event(wfc, input, PTR_FLAGS_MOVE, X_POS(lParam) - wfc->offset_x,
Y_POS(lParam) - wfc->offset_y);
break;
#if (_WIN32_WINNT >= 0x0400) || (_WIN32_WINDOWS > 0x0400)
case WM_MOUSEWHEEL:
wf_event_process_WM_MOUSEWHEEL(wfc, hWnd, Msg, wParam, lParam, FALSE,
X_POS(lParam) - wfc->offset_x,
Y_POS(lParam) - wfc->offset_y);
break;
#endif
#if (_WIN32_WINNT >= 0x0600)
case WM_MOUSEHWHEEL:
wf_event_process_WM_MOUSEWHEEL(wfc, hWnd, Msg, wParam, lParam, TRUE,
X_POS(lParam) - wfc->offset_x,
Y_POS(lParam) - wfc->offset_y);
break;
#endif
case WM_SETCURSOR:
if (LOWORD(lParam) == HTCLIENT)
SetCursor(wfc->cursor);
else
DefWindowProc(hWnd, Msg, wParam, lParam);
break;
case WM_HSCROLL:
{
int xDelta; // xDelta = new_pos - current_pos
int xNewPos; // new position
int yDelta = 0;
switch (LOWORD(wParam))
{
// User clicked the scroll bar shaft left of the scroll box.
case SB_PAGEUP:
xNewPos = wfc->xCurrentScroll - 50;
break;
// User clicked the scroll bar shaft right of the scroll box.
case SB_PAGEDOWN:
xNewPos = wfc->xCurrentScroll + 50;
break;
// User clicked the left arrow.
case SB_LINEUP:
xNewPos = wfc->xCurrentScroll - 5;
break;
// User clicked the right arrow.
case SB_LINEDOWN:
xNewPos = wfc->xCurrentScroll + 5;
break;
// User dragged the scroll box.
case SB_THUMBPOSITION:
xNewPos = HIWORD(wParam);
break;
// user is dragging the scrollbar
case SB_THUMBTRACK:
xNewPos = HIWORD(wParam);
break;
default:
xNewPos = wfc->xCurrentScroll;
}
// New position must be between 0 and the screen width.
xNewPos = MAX(0, xNewPos);
xNewPos = MIN(wfc->xMaxScroll, xNewPos);
// If the current position does not change, do not scroll.
if (xNewPos == wfc->xCurrentScroll)
break;
// Determine the amount scrolled (in pixels).
xDelta = xNewPos - wfc->xCurrentScroll;
// Reset the current scroll position.
wfc->xCurrentScroll = xNewPos;
// Scroll the window. (The system repaints most of the
// client area when ScrollWindowEx is called; however, it is
// necessary to call UpdateWindow in order to repaint the
// rectangle of pixels that were invalidated.)
ScrollWindowEx(wfc->hwnd, -xDelta, -yDelta, (CONST RECT*)NULL, (CONST RECT*)NULL,
(HRGN)NULL, (PRECT)NULL, SW_INVALIDATE);
UpdateWindow(wfc->hwnd);
// Reset the scroll bar.
si.cbSize = sizeof(si);
si.fMask = SIF_POS;
si.nPos = wfc->xCurrentScroll;
SetScrollInfo(wfc->hwnd, SB_HORZ, &si, TRUE);
}
break;
case WM_VSCROLL:
{
int xDelta = 0;
int yDelta; // yDelta = new_pos - current_pos
int yNewPos; // new position
switch (LOWORD(wParam))
{
// User clicked the scroll bar shaft above the scroll box.
case SB_PAGEUP:
yNewPos = wfc->yCurrentScroll - 50;
break;
// User clicked the scroll bar shaft below the scroll box.
case SB_PAGEDOWN:
yNewPos = wfc->yCurrentScroll + 50;
break;
// User clicked the top arrow.
case SB_LINEUP:
yNewPos = wfc->yCurrentScroll - 5;
break;
// User clicked the bottom arrow.
case SB_LINEDOWN:
yNewPos = wfc->yCurrentScroll + 5;
break;
// User dragged the scroll box.
case SB_THUMBPOSITION:
yNewPos = HIWORD(wParam);
break;
// user is dragging the scrollbar
case SB_THUMBTRACK:
yNewPos = HIWORD(wParam);
break;
default:
yNewPos = wfc->yCurrentScroll;
}
// New position must be between 0 and the screen height.
yNewPos = MAX(0, yNewPos);
yNewPos = MIN(wfc->yMaxScroll, yNewPos);
// If the current position does not change, do not scroll.
if (yNewPos == wfc->yCurrentScroll)
break;
// Determine the amount scrolled (in pixels).
yDelta = yNewPos - wfc->yCurrentScroll;
// Reset the current scroll position.
wfc->yCurrentScroll = yNewPos;
// Scroll the window. (The system repaints most of the
// client area when ScrollWindowEx is called; however, it is
// necessary to call UpdateWindow in order to repaint the
// rectangle of pixels that were invalidated.)
ScrollWindowEx(wfc->hwnd, -xDelta, -yDelta, (CONST RECT*)NULL, (CONST RECT*)NULL,
(HRGN)NULL, (PRECT)NULL, SW_INVALIDATE);
UpdateWindow(wfc->hwnd);
// Reset the scroll bar.
si.cbSize = sizeof(si);
si.fMask = SIF_POS;
si.nPos = wfc->yCurrentScroll;
SetScrollInfo(wfc->hwnd, SB_VERT, &si, TRUE);
}
break;
case WM_SYSCOMMAND:
{
if (wParam == SYSCOMMAND_ID_SMARTSIZING)
{
HMENU hMenu = GetSystemMenu(wfc->hwnd, FALSE);
freerdp_set_param_bool(wfc->context.settings, FreeRDP_SmartSizing,
!wfc->context.settings->SmartSizing);
CheckMenuItem(hMenu, SYSCOMMAND_ID_SMARTSIZING,
wfc->context.settings->SmartSizing ? MF_CHECKED : MF_UNCHECKED);
}
else
{
processed = FALSE;
}
}
break;
default:
processed = FALSE;
break;
}
}
else
{
processed = FALSE;
}
if (processed)
return 0;
switch (Msg)
{
case WM_DESTROY:
PostQuitMessage(WM_QUIT);
break;
case WM_SETFOCUS:
DEBUG_KBD("getting focus %X", hWnd);
if (alt_ctrl_down())
g_flipping_in = TRUE;
g_focus_hWnd = hWnd;
freerdp_set_focus(wfc->context.instance);
break;
case WM_KILLFOCUS:
if (g_focus_hWnd == hWnd && wfc && !wfc->fullscreen)
{
DEBUG_KBD("loosing focus %X", hWnd);
if (alt_ctrl_down())
g_flipping_out = TRUE;
else
g_focus_hWnd = NULL;
}
break;
case WM_ACTIVATE:
{
int activate = (int)(short)LOWORD(wParam);
if (activate != WA_INACTIVE)
{
if (alt_ctrl_down())
g_flipping_in = TRUE;
g_focus_hWnd = hWnd;
}
else
{
if (alt_ctrl_down())
g_flipping_out = TRUE;
else
g_focus_hWnd = NULL;
}
}
default:
return DefWindowProc(hWnd, Msg, wParam, lParam);
break;
}
return 0;
}
BOOL wf_scale_blt(wfContext* wfc, HDC hdc, int x, int y, int w, int h, HDC hdcSrc, int x1, int y1,
DWORD rop)
{
rdpSettings* settings;
UINT32 ww, wh, dw, dh;
settings = wfc->context.settings;
if (!wfc->client_width)
wfc->client_width = settings->DesktopWidth;
if (!wfc->client_height)
wfc->client_height = settings->DesktopHeight;
ww = wfc->client_width;
wh = wfc->client_height;
dw = settings->DesktopWidth;
dh = settings->DesktopHeight;
if (!ww)
ww = dw;
if (!wh)
wh = dh;
if (wfc->fullscreen || !wfc->context.settings->SmartSizing || (ww == dw && wh == dh))
{
return BitBlt(hdc, x, y, w, h, wfc->primary->hdc, x1, y1, SRCCOPY);
}
else
{
SetStretchBltMode(hdc, HALFTONE);
SetBrushOrgEx(hdc, 0, 0, NULL);
return StretchBlt(hdc, 0, 0, ww, wh, wfc->primary->hdc, 0, 0, dw, dh, SRCCOPY);
}
return TRUE;
}
static BOOL wf_scale_mouse_pos(wfContext* wfc, UINT16* x, UINT16* y)
{
int ww, wh, dw, dh;
rdpContext* context;
rdpSettings* settings;
if (!wfc || !x || !y)
return FALSE;
settings = wfc->context.settings;
if (!settings)
return FALSE;
if (!wfc->client_width)
wfc->client_width = settings->DesktopWidth;
if (!wfc->client_height)
wfc->client_height = settings->DesktopHeight;
ww = wfc->client_width;
wh = wfc->client_height;
dw = settings->DesktopWidth;
dh = settings->DesktopHeight;
if (!settings->SmartSizing || ((ww == dw) && (wh == dh)))
{
*x += wfc->xCurrentScroll;
*y += wfc->yCurrentScroll;
}
else
{
*x = *x * dw / ww + wfc->xCurrentScroll;
*y = *y * dh / wh + wfc->yCurrentScroll;
}
return TRUE;
}
static BOOL wf_scale_mouse_event(wfContext* wfc, rdpInput* input, UINT16 flags, UINT16 x, UINT16 y)
{
MouseEventEventArgs eventArgs;
if (!wf_scale_mouse_pos(wfc, &x, &y))
return FALSE;
if (freerdp_input_send_mouse_event(input, flags, x, y))
return FALSE;
eventArgs.flags = flags;
eventArgs.x = x;
eventArgs.y = y;
PubSub_OnMouseEvent(wfc->context.pubSub, &wfc->context, &eventArgs);
return TRUE;
}
#if (_WIN32_WINNT >= 0x0500)
static BOOL wf_scale_mouse_event_ex(wfContext* wfc, rdpInput* input, UINT16 flags,
UINT16 buttonMask, UINT16 x, UINT16 y)
{
MouseEventExEventArgs eventArgs;
if (buttonMask & XBUTTON1)
flags |= PTR_XFLAGS_BUTTON1;
if (buttonMask & XBUTTON2)
flags |= PTR_XFLAGS_BUTTON2;
if (!wf_scale_mouse_pos(wfc, &x, &y))
return FALSE;
if (freerdp_input_send_extended_mouse_event(input, flags, x, y))
return FALSE;
eventArgs.flags = flags;
eventArgs.x = x;
eventArgs.y = y;
PubSub_OnMouseEventEx(wfc->context.pubSub, &wfc->context, &eventArgs);
return TRUE;
}
#endif