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netsurf/framebuffer/fbtk/event.c

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/*
* Copyright 2010 Vincent Sanders <vince@simtec.co.uk>
*
* Framebuffer windowing toolkit event processing.
*
* 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/>.
*/
#include <sys/types.h>
#include <stdint.h>
#include <string.h>
#include <stdbool.h>
#include <libnsfb.h>
#include <libnsfb_plot.h>
#include <libnsfb_plot_util.h>
#include <libnsfb_event.h>
#include <libnsfb_cursor.h>
#include "utils/utils.h"
#include "utils/log.h"
#include "css/css.h"
#include "desktop/browser.h"
#include "desktop/plotters.h"
#include "desktop/textinput.h"
#include "framebuffer/gui.h"
#include "framebuffer/fbtk.h"
#include "framebuffer/image_data.h"
#include "widget.h"
/* exported function documented in fbtk.h */
void
fbtk_input(fbtk_widget_t *root, nsfb_event_t *event)
{
fbtk_widget_t *input;
root = fbtk_get_root_widget(root);
/* obtain widget with input focus */
input = root->u.root.input;
if (input == NULL) {
LOG(("No widget has input focus."));
return; /* no widget with input */
}
fbtk_post_callback(input, FBTK_CBT_INPUT, event);
}
/* exported function documented in fbtk.h */
void
fbtk_click(fbtk_widget_t *widget, nsfb_event_t *event)
{
fbtk_widget_t *root;
fbtk_widget_t *clicked;
nsfb_bbox_t cloc;
int x, y;
/* ensure we have the root widget */
root = fbtk_get_root_widget(widget);
nsfb_cursor_loc_get(root->u.root.fb, &cloc);
clicked = fbtk_get_widget_at(root, cloc.x0, cloc.y0);
if (clicked == NULL)
return;
if (fbtk_get_handler(clicked, FBTK_CBT_INPUT) != NULL) {
fbtk_set_focus(clicked);
}
x = fbtk_get_absx(clicked);
y = fbtk_get_absy(clicked);
LOG(("clicked %p at %d,%d", clicked, x, y));
/* post the click */
fbtk_post_callback(clicked, FBTK_CBT_CLICK, event, cloc.x0 - x, cloc.y0 - y);
}
/* exported function documented in fbtk.h */
bool
fbtk_tgrab_pointer(fbtk_widget_t *widget)
{
fbtk_widget_t *root;
/* ensure we have the root widget */
root = fbtk_get_root_widget(widget);
if (root->u.root.grabbed == widget) {
/* release pointer grab */
root->u.root.grabbed = NULL;
return true;
} else if (root->u.root.grabbed == NULL) {
/* set pointer grab */
root->u.root.grabbed = widget;
return true;
}
/* pointer was already grabbed */
return false;
}
/* exported function documented in fbtk.h */
void
fbtk_warp_pointer(fbtk_widget_t *widget, int x, int y, bool relative)
{
fbtk_widget_t *root;
fbtk_widget_t *moved;
nsfb_bbox_t cloc;
/* ensure we have the root widget */
root = fbtk_get_root_widget(widget);
if (relative) {
nsfb_cursor_loc_get(root->u.root.fb, &cloc);
cloc.x0 += x;
cloc.y0 += y;
} else {
cloc.x0 = x;
cloc.y0 = y;
}
/* ensure cursor location lies within the root widget */
if (cloc.x0 < root->x)
cloc.x0 = root->x;
if (cloc.x0 >= (root->x + root->width))
cloc.x0 = (root->x + root->width) - 1;
if (cloc.y0 < root->y)
cloc.y0 = root->y;
if (cloc.y0 >= (root->y + root->height))
cloc.y0 = (root->y + root->height) - 1;
if (root->u.root.grabbed == NULL) {
/* update the pointer cursor */
nsfb_cursor_loc_set(root->u.root.fb, &cloc);
moved = fbtk_get_widget_at(root, cloc.x0, cloc.y0);
x = fbtk_get_absx(moved);
y = fbtk_get_absy(moved);
/* post enter and leaving messages */
if (moved != root->u.root.prev) {
fbtk_post_callback(root->u.root.prev, FBTK_CBT_POINTERLEAVE);
root->u.root.prev = moved;
fbtk_post_callback(root->u.root.prev, FBTK_CBT_POINTERENTER);
}
} else {
/* pointer movement has been grabbed by a widget */
moved = root->u.root.grabbed;
/* ensure pointer remains within widget boundary */
x = fbtk_get_absx(moved);
y = fbtk_get_absy(moved);
if (cloc.x0 < x)
cloc.x0 = x;
if (cloc.y0 < y)
cloc.y0 = y;
if (cloc.x0 > (x + moved->width))
cloc.x0 = (x + moved->width);
if (cloc.y0 > (y + moved->height))
cloc.y0 = (y + moved->height);
/* update the pointer cursor */
nsfb_cursor_loc_set(root->u.root.fb, &cloc);
}
/* post the movement */
fbtk_post_callback(moved, FBTK_CBT_POINTERMOVE, cloc.x0 - x, cloc.y0 - y);
}
/* exported function documented in fbtk.h */
bool
fbtk_event(fbtk_widget_t *root, nsfb_event_t *event, int timeout)
{
nsfb_bbox_t cloc;
bool unused = false; /* is the event available */
bool move_pointer = false; /* whether pointer move events occured */
/* ensure we have the root widget */
root = fbtk_get_root_widget(root);
do {
if (nsfb_event(root->u.root.fb, event, timeout) == false) {
if (move_pointer)
fbtk_warp_pointer(root, cloc.x0, cloc.y0,
false);
return false;
}
if (move_pointer && event->type != NSFB_EVENT_MOVE_RELATIVE &&
event->type != NSFB_EVENT_MOVE_ABSOLUTE) {
/* Flush the movements */
fbtk_warp_pointer(root, cloc.x0, cloc.y0, false);
} else if (!move_pointer &&
event->type == NSFB_EVENT_MOVE_RELATIVE) {
/* Get current pointer coords */
nsfb_cursor_loc_get(root->u.root.fb, &cloc);
}
switch (event->type) {
case NSFB_EVENT_KEY_DOWN:
case NSFB_EVENT_KEY_UP:
if ((event->value.keycode >= NSFB_KEY_MOUSE_1) &&
(event->value.keycode <= NSFB_KEY_MOUSE_5)) {
fbtk_click(root, event);
} else {
fbtk_input(root, event);
}
break;
case NSFB_EVENT_CONTROL:
unused = true;
break;
case NSFB_EVENT_MOVE_RELATIVE:
/* Consecutive move events are consolidated into a
* single pointer warp */
move_pointer = true;
cloc.x0 += event->value.vector.x;
cloc.y0 += event->value.vector.y;
timeout = 0;
break;
case NSFB_EVENT_MOVE_ABSOLUTE:
/* Consecutive move events are consolidated into a
* single pointer warp */
move_pointer = true;
cloc.x0 = event->value.vector.x;
cloc.y0 = event->value.vector.y;
timeout = 0;
break;
default:
break;
}
} while (event->type == NSFB_EVENT_MOVE_RELATIVE ||
event->type == NSFB_EVENT_MOVE_ABSOLUTE);
return unused;
}
static int keymap[] = {
/* 0 1 2 3 4 5 6 7 8 9 */
-1, -1, -1, -1, -1, -1, -1, -1, 8, 9, /* 0 - 9 */
-1, -1, -1, 13, -1, -1, -1, -1, -1, -1, /* 10 - 19 */
-1, -1, -1, -1, -1, -1, -1, 27, -1, -1, /* 20 - 29 */
-1, -1, ' ', '!', '"', '#', '$', -1, '&','\'', /* 30 - 39 */
'(', ')', '*', '+', ',', '-', '.', '/', '0', '1', /* 40 - 49 */
'2', '3', '4', '5', '6', '7', '8', '9', ':', ';', /* 50 - 59 */
'<', '=', '>', '?', '@', -1, -1, -1, -1, -1, /* 60 - 69 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 70 - 79 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 80 - 89 */
-1, '[','\\', ']', '~', '_', '`', 'a', 'b', 'c', /* 90 - 99 */
'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', /* 100 - 109 */
'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', /* 110 - 119 */
'x', 'y', 'z', -1, -1, -1, -1, -1, -1, -1, /* 120 - 129 */
};
static int sh_keymap[] = {
/* 0 1 2 3 4 5 6 7 8 9 */
-1, -1, -1, -1, -1, -1, -1, -1, 8, 9, /* 0 - 9 */
-1, -1, -1, 13, -1, -1, -1, -1, -1, -1, /* 10 - 19 */
-1, -1, -1, -1, -1, -1, -1, 27, -1, -1, /* 20 - 29 */
-1, -1, ' ', '!', '"', '~', '$', -1, '&', '@', /* 30 - 39 */
'(', ')', '*', '+', '<', '_', '>', '?', ')', '!', /* 40 - 49 */
'"', 243, '$', '%', '^', '&', '*', '(', ';', ':', /* 50 - 59 */
'<', '+', '>', '?', '@', -1, -1, -1, -1, -1, /* 60 - 69 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 70 - 79 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 80 - 89 */
-1, '{', '|', '}', '~', '_', 254, 'A', 'B', 'C', /* 90 - 99 */
'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', /* 100 - 109 */
'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', /* 110 - 119 */
'X', 'Y', 'Z', -1, -1, -1, -1, -1, -1, -1, /* 120 - 129 */
};
/* exported function documented in fbtk.h */
int
fbtk_keycode_to_ucs4(int code, fbtk_modifier_type mods)
{
int ucs4 = -1;
if (mods & FBTK_MOD_LSHIFT || mods & FBTK_MOD_RSHIFT) {
if ((code >= 0) && (code < (int) NOF_ELEMENTS(sh_keymap)))
ucs4 = sh_keymap[code];
} else if (mods == FBTK_MOD_CLEAR) {
if ((code >= 0) && (code < (int) NOF_ELEMENTS(keymap)))
ucs4 = keymap[code];
} else if (mods & FBTK_MOD_LCTRL || mods & FBTK_MOD_RCTRL) {
switch (code) {
case NSFB_KEY_a:
ucs4 = KEY_SELECT_ALL;
break;
case NSFB_KEY_c:
ucs4 = KEY_COPY_SELECTION;
break;
case NSFB_KEY_u:
ucs4 = KEY_DELETE_LINE;
break;
case NSFB_KEY_v:
ucs4 = KEY_PASTE;
break;
case NSFB_KEY_x:
ucs4 = KEY_CUT_SELECTION;
break;
case NSFB_KEY_z:
ucs4 = KEY_CLEAR_SELECTION;
break;
default:
break;
}
}
return ucs4;
}
/*
* Local Variables:
* c-basic-offset:8
* End:
*/
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