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netsurf/frontends/windows/drawable.c

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/*
* Copyright 2011 Vincent Sanders <vince@simtec.co.uk>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* \file
* win32 implementation of drawable window showing browser context
*/
#include <stdbool.h>
#include <stdint.h>
#include "utils/config.h"
#include <windows.h>
#include <windowsx.h>
#include "utils/errors.h"
#include "utils/log.h"
#include "netsurf/browser_window.h"
#include "netsurf/plotters.h"
#include "netsurf/keypress.h"
#include "windows/windbg.h"
#include "windows/plot.h"
#include "windows/window.h"
#include "windows/local_history.h"
#include "windows/drawable.h"
static const wchar_t *windowclassname_drawable = L"nswsdrawablewindow";
/**
* Handle wheel scroll messages.
*/
static LRESULT
nsws_drawable_wheel(struct gui_window *gw, HWND hwnd, WPARAM wparam)
{
int i, z = GET_WHEEL_DELTA_WPARAM(wparam) / WHEEL_DELTA;
int key = LOWORD(wparam);
DWORD command;
unsigned int newmessage = WM_VSCROLL;
if (key == MK_SHIFT) {
command = (z > 0) ? SB_LINERIGHT : SB_LINELEFT;
newmessage = WM_HSCROLL;
} else {
/* add MK_CONTROL -> zoom */
command = (z > 0) ? SB_LINEUP : SB_LINEDOWN;
}
z = (z < 0) ? -1 * z : z;
for (i = 0; i < z; i++) {
SendMessage(hwnd, newmessage, MAKELONG(command, 0), 0);
}
return 0;
}
/**
* Handle vertical scroll messages.
*/
static LRESULT
nsws_drawable_vscroll(struct gui_window *gw, HWND hwnd, WPARAM wparam)
{
int width, height;
SCROLLINFO si;
int mem;
NSLOG(netsurf, INFO, "VSCROLL %d", gw->requestscrolly);
if (gw->requestscrolly != 0)
return 0;
si.cbSize = sizeof(si);
si.fMask = SIF_ALL;
GetScrollInfo(hwnd, SB_VERT, &si);
mem = si.nPos;
switch (LOWORD(wparam)) {
case SB_TOP:
si.nPos = si.nMin;
break;
case SB_BOTTOM:
si.nPos = si.nMax;
break;
case SB_LINEUP:
si.nPos -= 30;
break;
case SB_LINEDOWN:
si.nPos += 30;
break;
case SB_PAGEUP:
si.nPos -= gw->height;
break;
case SB_PAGEDOWN:
si.nPos += gw->height;
break;
case SB_THUMBTRACK:
si.nPos = si.nTrackPos;
break;
default:
break;
}
si.fMask = SIF_POS;
if ((gw->bw != NULL) &&
(browser_window_get_extents(gw->bw, true,
&width, &height) == NSERROR_OK)) {
si.nPos = min(si.nPos, height - gw->height);
}
si.nPos = max(si.nPos, 0);
SetScrollInfo(hwnd, SB_VERT, &si, TRUE);
GetScrollInfo(hwnd, SB_VERT, &si);
if (si.nPos != mem) {
struct rect rect;
rect.x0 = rect.x1 = gw->scrollx;
rect.y0 = rect.y1 = gw->scrolly + gw->requestscrolly + si.nPos - mem;
win32_window_set_scroll(gw, &rect);
}
return 0;
}
/**
* Handle horizontal scroll messages.
*/
static LRESULT
nsws_drawable_hscroll(struct gui_window *gw, HWND hwnd, WPARAM wparam)
{
int width, height;
SCROLLINFO si;
int mem;
NSLOG(netsurf, INFO, "HSCROLL %d", gw->requestscrollx);
if (gw->requestscrollx != 0)
return 0;
si.cbSize = sizeof(si);
si.fMask = SIF_ALL;
GetScrollInfo(hwnd, SB_HORZ, &si);
mem = si.nPos;
switch (LOWORD(wparam)) {
case SB_LINELEFT:
si.nPos -= 30;
break;
case SB_LINERIGHT:
si.nPos += 30;
break;
case SB_PAGELEFT:
si.nPos -= gw->width;
break;
case SB_PAGERIGHT:
si.nPos += gw->width;
break;
case SB_THUMBTRACK:
si.nPos = si.nTrackPos;
break;
default:
break;
}
si.fMask = SIF_POS;
if ((gw->bw != NULL) &&
(browser_window_get_extents(gw->bw, true,
&width, &height) == NSERROR_OK)) {
si.nPos = min(si.nPos, width - gw->width);
}
si.nPos = max(si.nPos, 0);
SetScrollInfo(hwnd, SB_HORZ, &si, TRUE);
GetScrollInfo(hwnd, SB_HORZ, &si);
if (si.nPos != mem) {
struct rect rect;
rect.x0 = rect.x1 = gw->scrollx + gw->requestscrollx + si.nPos - mem;
rect.y0 = rect.y1 = gw->scrolly;
win32_window_set_scroll(gw, &rect);
}
return 0;
}
/**
* Handle resize events.
*/
static LRESULT
nsws_drawable_resize(struct gui_window *gw)
{
browser_window_schedule_reformat(gw->bw);
return 0;
}
/**
* Handle unicode character messages.
*/
static LRESULT
nsws_drawable_unichar(struct gui_window *gw, HWND hwnd, WPARAM wparam)
{
uint32_t nskey;
if (wparam == UNICODE_NOCHAR) {
return 1;
}
nskey = wparam;
browser_window_key_press(gw->bw, nskey);
return 0;
}
/**
* Handle character messages.
*
* WM_CHAR is generated when WM_KEYDOWN message are passed to
* TranslateMessage; wParam is UTF-16. If the codepoint is 4
* bytes, there are 2 WM_CHAR message, one with the high
* surrogate and one with the low surrogate.
*/
static LRESULT
nsws_drawable_char(struct gui_window *gw, HWND hwnd, WPARAM wparam)
{
uint32_t nskey;
nskey = wparam;
const uint32_t utf16_hi_surrogate_start = 0xD800;
const uint32_t utf16_lo_surrogate_start = 0xDC00;
const uint32_t utf16_surrogate_end = 0xDFFF;
static uint32_t highSurrogate = 0;
if ((nskey >= utf16_hi_surrogate_start) &&
(nskey < utf16_lo_surrogate_start) ) {
highSurrogate = nskey;
} else {
if ((nskey >= utf16_lo_surrogate_start) &&
(nskey <= utf16_surrogate_end)) {
uint32_t lowSurrogate = nskey;
nskey = (highSurrogate - utf16_hi_surrogate_start) << 10;
nskey |= ( lowSurrogate - utf16_lo_surrogate_start );
nskey += 0x10000;
}
highSurrogate = 0;
browser_window_key_press(gw->bw, nskey);
}
return 0;
}
/**
* Handle keydown messages.
*/
static LRESULT
nsws_drawable_keydown(struct gui_window *gw, HWND hwnd, WPARAM wparam)
{
uint32_t i;
bool shift = ((GetKeyState(VK_SHIFT) & 0x8000) == 0x8000);
switch(wparam) {
case VK_LEFT:
i = NS_KEY_LEFT;
if (shift)
SendMessage(hwnd, WM_HSCROLL,
MAKELONG(SB_LINELEFT, 0), 0);
break;
case VK_RIGHT:
i = NS_KEY_RIGHT;
if (shift)
SendMessage(hwnd, WM_HSCROLL,
MAKELONG(SB_LINERIGHT, 0), 0);
break;
case VK_UP:
i = NS_KEY_UP;
if (shift)
SendMessage(hwnd, WM_VSCROLL,
MAKELONG(SB_LINEUP, 0), 0);
break;
case VK_DOWN:
i = NS_KEY_DOWN;
if (shift)
SendMessage(hwnd, WM_VSCROLL,
MAKELONG(SB_LINEDOWN, 0), 0);
break;
case VK_HOME:
i = NS_KEY_LINE_START;
if (shift)
SendMessage(hwnd, WM_HSCROLL,
MAKELONG(SB_PAGELEFT, 0), 0);
break;
case VK_END:
i = NS_KEY_LINE_END;
if (shift)
SendMessage(hwnd, WM_HSCROLL,
MAKELONG(SB_PAGERIGHT, 0), 0);
break;
case VK_DELETE:
i = NS_KEY_DELETE_RIGHT;
break;
case VK_NEXT:
SendMessage(hwnd, WM_VSCROLL, MAKELONG(SB_PAGEDOWN, 0), 0);
return 1;
case VK_PRIOR:
SendMessage(hwnd, WM_VSCROLL, MAKELONG(SB_PAGEUP, 0), 0);
return 1;
default:
return 1;
}
browser_window_key_press(gw->bw, i);
return 0;
}
/**
* Handle paint messages.
*/
static LRESULT
nsws_drawable_paint(struct gui_window *gw, HWND hwnd)
{
struct rect clip;
PAINTSTRUCT ps;
struct redraw_context ctx = {
.interactive = true,
.background_images = true,
.plot = &win_plotters
};
BeginPaint(hwnd, &ps);
if (gw != NULL) {
plot_hdc = ps.hdc;
clip.x0 = ps.rcPaint.left;
clip.y0 = ps.rcPaint.top;
clip.x1 = ps.rcPaint.right;
clip.y1 = ps.rcPaint.bottom;
/**
* \todo work out why the heck scroll needs scaling
*/
browser_window_redraw(gw->bw,
-gw->scrollx,
-gw->scrolly,
&clip,
&ctx);
}
EndPaint(hwnd, &ps);
return 0;
}
/**
* Handle mouse button up messages.
*/
static LRESULT
nsws_drawable_mouseup(struct gui_window *gw,
int x,
int y,
browser_mouse_state press,
browser_mouse_state click)
{
bool shift = ((GetKeyState(VK_SHIFT) & 0x8000) == 0x8000);
bool ctrl = ((GetKeyState(VK_CONTROL) & 0x8000) == 0x8000);
bool alt = ((GetKeyState(VK_MENU) & 0x8000) == 0x8000);
if ((gw == NULL) ||
(gw->mouse == NULL) ||
(gw->bw == NULL))
return 0;
NSLOG(netsurf, INFO, "state 0x%x, press 0x%x", gw->mouse->state,
press);
if ((gw->mouse->state & press) != 0) {
gw->mouse->state &= ~press;
gw->mouse->state |= click;
}
if (((gw->mouse->state & BROWSER_MOUSE_MOD_1) != 0) && !shift)
gw->mouse->state &= ~BROWSER_MOUSE_MOD_1;
if (((gw->mouse->state & BROWSER_MOUSE_MOD_2) != 0) && !ctrl)
gw->mouse->state &= ~BROWSER_MOUSE_MOD_2;
if (((gw->mouse->state & BROWSER_MOUSE_MOD_3) != 0) && !alt)
gw->mouse->state &= ~BROWSER_MOUSE_MOD_3;
if ((gw->mouse->state & click) != 0) {
NSLOG(netsurf, INFO,
"mouse click bw %p, state 0x%x, x %d, y %d",
gw->bw,
gw->mouse->state,
x + gw->scrollx,
y + gw->scrolly);
browser_window_mouse_click(gw->bw,
gw->mouse->state,
x + gw->scrollx,
y + gw->scrolly);
} else {
browser_window_mouse_track(gw->bw,
0,
x + gw->scrollx,
y + gw->scrolly);
}
gw->mouse->state = 0;
return 0;
}
/**
* Handle mouse button down messages.
*/
static LRESULT
nsws_drawable_mousedown(struct gui_window *gw,
int x, int y,
browser_mouse_state button)
{
if ((gw == NULL) ||
(gw->mouse == NULL) ||
(gw->bw == NULL)) {
nsw32_local_history_hide();
return 0;
}
gw->mouse->state = button;
if ((GetKeyState(VK_SHIFT) & 0x8000) == 0x8000)
gw->mouse->state |= BROWSER_MOUSE_MOD_1;
if ((GetKeyState(VK_CONTROL) & 0x8000) == 0x8000)
gw->mouse->state |= BROWSER_MOUSE_MOD_2;
if ((GetKeyState(VK_MENU) & 0x8000) == 0x8000)
gw->mouse->state |= BROWSER_MOUSE_MOD_3;
gw->mouse->pressed_x = x + gw->scrollx;
gw->mouse->pressed_y = y + gw->scrolly;
NSLOG(netsurf, INFO, "mouse click bw %p, state %x, x %d, y %d",
gw->bw,
gw->mouse->state,
x + gw->scrollx,
y + gw->scrolly);
browser_window_mouse_click(gw->bw,
gw->mouse->state,
x + gw->scrollx,
y + gw->scrolly);
return 0;
}
/**
* Handle mouse movement messages.
*/
static LRESULT
nsws_drawable_mousemove(struct gui_window *gw, int x, int y)
{
bool shift = ((GetKeyState(VK_SHIFT) & 0x8000) == 0x8000);
bool ctrl = ((GetKeyState(VK_CONTROL) & 0x8000) == 0x8000);
bool alt = ((GetKeyState(VK_MENU) & 0x8000) == 0x8000);
if ((gw == NULL) || (gw->mouse == NULL) || (gw->bw == NULL))
return 0;
/* add scroll offsets */
x = x + gw->scrollx;
y = y + gw->scrolly;
/* if mouse button held down and pointer moved more than
* minimum distance drag is happening */
if (((gw->mouse->state & (BROWSER_MOUSE_PRESS_1 | BROWSER_MOUSE_PRESS_2)) != 0) &&
(abs(x - gw->mouse->pressed_x) >= 5) &&
(abs(y - gw->mouse->pressed_y) >= 5)) {
NSLOG(netsurf, INFO, "Drag start state 0x%x",
gw->mouse->state);
if ((gw->mouse->state & BROWSER_MOUSE_PRESS_1) != 0) {
browser_window_mouse_click(gw->bw, BROWSER_MOUSE_DRAG_1,
gw->mouse->pressed_x,
gw->mouse->pressed_y);
gw->mouse->state &= ~BROWSER_MOUSE_PRESS_1;
gw->mouse->state |= BROWSER_MOUSE_HOLDING_1 |
BROWSER_MOUSE_DRAG_ON;
}
else if ((gw->mouse->state & BROWSER_MOUSE_PRESS_2) != 0) {
browser_window_mouse_click(gw->bw, BROWSER_MOUSE_DRAG_2,
gw->mouse->pressed_x,
gw->mouse->pressed_y);
gw->mouse->state &= ~BROWSER_MOUSE_PRESS_2;
gw->mouse->state |= BROWSER_MOUSE_HOLDING_2 |
BROWSER_MOUSE_DRAG_ON;
}
}
if (((gw->mouse->state & BROWSER_MOUSE_MOD_1) != 0) && !shift)
gw->mouse->state &= ~BROWSER_MOUSE_MOD_1;
if (((gw->mouse->state & BROWSER_MOUSE_MOD_2) != 0) && !ctrl)
gw->mouse->state &= ~BROWSER_MOUSE_MOD_2;
if (((gw->mouse->state & BROWSER_MOUSE_MOD_3) != 0) && !alt)
gw->mouse->state &= ~BROWSER_MOUSE_MOD_3;
browser_window_mouse_track(gw->bw, gw->mouse->state, x, y);
return 0;
}
/**
* Called when activity occours within the drawable window.
*/
static LRESULT CALLBACK
nsws_window_drawable_event_callback(HWND hwnd,
UINT msg,
WPARAM wparam,
LPARAM lparam)
{
struct gui_window *gw;
LOG_WIN_MSG(hwnd, msg, wparam, lparam);
gw = nsws_get_gui_window(hwnd);
if (gw == NULL) {
NSLOG(netsurf, INFO,
"Unable to find gui window structure for hwnd %p", hwnd);
return DefWindowProc(hwnd, msg, wparam, lparam);
}
switch(msg) {
case WM_MOUSEMOVE:
return nsws_drawable_mousemove(gw,
GET_X_LPARAM(lparam),
GET_Y_LPARAM(lparam));
case WM_LBUTTONDOWN:
nsws_drawable_mousedown(gw,
GET_X_LPARAM(lparam),
GET_Y_LPARAM(lparam),
BROWSER_MOUSE_PRESS_1);
SetFocus(hwnd);
nsw32_local_history_hide();
return 0;
case WM_RBUTTONDOWN:
nsws_drawable_mousedown(gw,
GET_X_LPARAM(lparam),
GET_Y_LPARAM(lparam),
BROWSER_MOUSE_PRESS_2);
SetFocus(hwnd);
return 0;
case WM_LBUTTONUP:
return nsws_drawable_mouseup(gw,
GET_X_LPARAM(lparam),
GET_Y_LPARAM(lparam),
BROWSER_MOUSE_PRESS_1,
BROWSER_MOUSE_CLICK_1);
case WM_RBUTTONUP:
return nsws_drawable_mouseup(gw,
GET_X_LPARAM(lparam),
GET_Y_LPARAM(lparam),
BROWSER_MOUSE_PRESS_2,
BROWSER_MOUSE_CLICK_2);
case WM_ERASEBKGND: /* ignore as drawable window is redrawn on paint */
return 0;
case WM_PAINT: /* redraw the exposed part of the window */
return nsws_drawable_paint(gw, hwnd);
case WM_KEYDOWN:
if (nsws_drawable_keydown(gw, hwnd, wparam) == 0) {
return 0;
}
break;
case WM_CHAR:
return nsws_drawable_char(gw, hwnd, wparam);
case WM_UNICHAR:
return nsws_drawable_unichar(gw, hwnd, wparam);
case WM_SIZE:
return nsws_drawable_resize(gw);
case WM_HSCROLL:
return nsws_drawable_hscroll(gw, hwnd, wparam);
case WM_VSCROLL:
return nsws_drawable_vscroll(gw, hwnd, wparam);
case WM_MOUSEWHEEL:
return nsws_drawable_wheel(gw, hwnd, wparam);
case WM_PASTE:
browser_window_key_press(gw->bw, NS_KEY_PASTE);
return 0;
case WM_COPY:
browser_window_key_press(gw->bw, NS_KEY_COPY_SELECTION);
return 0;
case WM_CUT:
browser_window_key_press(gw->bw, NS_KEY_CUT_SELECTION);
return 0;
case WM_CLEAR:
/**
* \todo win32 clear operation deletes the contents of
* the selection but ns clear selection only
* removes the highlight.
*/
browser_window_key_press(gw->bw, NS_KEY_CLEAR_SELECTION);
return 0;
}
return DefWindowProc(hwnd, msg, wparam, lparam);
}
/**
* Create a drawable window.
*/
HWND
nsws_window_create_drawable(HINSTANCE hinstance,
HWND hparent,
struct gui_window *gw)
{
HWND hwnd;
hwnd = CreateWindowExW(0,
windowclassname_drawable,
NULL,
WS_VISIBLE | WS_CHILD,
0, 0,
0, 0,
hparent,
NULL,
hinstance,
NULL);
if (hwnd == NULL) {
win_perror("WindowCreateDrawable");
NSLOG(netsurf, INFO, "Window creation failed");
return NULL;
}
/* set the gui window associated with this toolbar */
SetProp(hwnd, TEXT("GuiWnd"), (HANDLE)gw);
return hwnd;
}
/**
* Create the drawable window class.
*/
nserror
nsws_create_drawable_class(HINSTANCE hinstance) {
nserror ret = NSERROR_OK;
WNDCLASSEXW w;
/* drawable area */
w.cbSize = sizeof(WNDCLASSEX);
w.style = 0;
w.lpfnWndProc = nsws_window_drawable_event_callback;
w.cbClsExtra = 0;
w.cbWndExtra = 0;
w.hInstance = hinstance;
w.hIcon = NULL;
w.hCursor = NULL;
w.hbrBackground = (HBRUSH)(COLOR_MENU + 1);
w.lpszMenuName = NULL;
w.lpszClassName = windowclassname_drawable;
w.hIconSm = NULL;
if (RegisterClassExW(&w) == 0) {
win_perror("DrawableClass");
ret = NSERROR_INIT_FAILED;
}
return ret;
}