sway/sway/input_state.c
2016-09-01 08:18:37 -04:00

494 lines
13 KiB
C

#include <string.h>
#include <stdbool.h>
#include <ctype.h>
#include "sway/input_state.h"
#include "sway/config.h"
#include "log.h"
#define KEY_STATE_MAX_LENGTH 64
struct key_state {
/*
* Aims to store state regardless of modifiers.
* If you press a key, then hold shift, then release the key, we'll
* get two different key syms, but the same key code. This handles
* that scenario and makes sure we can use the right bindings.
*/
uint32_t key_sym;
uint32_t alt_sym;
uint32_t key_code;
};
static struct key_state key_state_array[KEY_STATE_MAX_LENGTH];
static struct key_state last_released;
static uint32_t modifiers_state;
void input_init(void) {
int i;
for (i = 0; i < KEY_STATE_MAX_LENGTH; ++i) {
struct key_state none = { 0, 0, 0 };
key_state_array[i] = none;
}
struct key_state none = { 0, 0, 0 };
last_released = none;
modifiers_state = 0;
}
uint32_t modifier_state_changed(uint32_t new_state, uint32_t mod) {
if ((new_state & mod) != 0) { // pressed
if ((modifiers_state & mod) != 0) { // already pressed
return MOD_STATE_UNCHANGED;
} else { // pressed
return MOD_STATE_PRESSED;
}
} else { // not pressed
if ((modifiers_state & mod) != 0) { // released
return MOD_STATE_RELEASED;
} else { // already released
return MOD_STATE_UNCHANGED;
}
}
}
void modifiers_state_update(uint32_t new_state) {
modifiers_state = new_state;
}
static uint8_t find_key(uint32_t key_sym, uint32_t key_code, bool update) {
int i;
for (i = 0; i < KEY_STATE_MAX_LENGTH; ++i) {
if (0 == key_sym && 0 == key_code && key_state_array[i].key_sym == 0) {
break;
}
if (key_sym != 0 && (key_state_array[i].key_sym == key_sym
|| key_state_array[i].alt_sym == key_sym)) {
break;
}
if (update && key_state_array[i].key_code == key_code) {
key_state_array[i].alt_sym = key_sym;
break;
}
if (key_sym == 0 && key_code != 0 && key_state_array[i].key_code == key_code) {
break;
}
}
return i;
}
bool check_key(uint32_t key_sym, uint32_t key_code) {
return find_key(key_sym, key_code, false) < KEY_STATE_MAX_LENGTH;
}
bool check_released_key(uint32_t key_sym) {
return (key_sym != 0
&& (last_released.key_sym == key_sym
|| last_released.alt_sym == key_sym));
}
void press_key(uint32_t key_sym, uint32_t key_code) {
if (key_code == 0) {
return;
}
// Check if key exists
if (!check_key(key_sym, key_code)) {
// Check that we don't exceed buffer length
int insert = find_key(0, 0, true);
if (insert < KEY_STATE_MAX_LENGTH) {
key_state_array[insert].key_sym = key_sym;
key_state_array[insert].key_code = key_code;
}
}
}
void release_key(uint32_t key_sym, uint32_t key_code) {
uint8_t index = find_key(key_sym, key_code, true);
if (index < KEY_STATE_MAX_LENGTH) {
last_released.key_sym = key_state_array[index].key_sym;
last_released.alt_sym = key_state_array[index].alt_sym;
last_released.key_code = key_state_array[index].key_code;
struct key_state none = { 0, 0, 0 };
key_state_array[index] = none;
}
}
// Pointer state and mode
struct pointer_state pointer_state;
static struct mode_state {
// initial view state
double x, y, w, h;
swayc_t *ptr;
// Containers used for resizing horizontally
struct {
double w;
swayc_t *ptr;
struct {
double w;
swayc_t *ptr;
} parent;
} horiz;
// Containers used for resizing vertically
struct {
double h;
swayc_t *ptr;
struct {
double h;
swayc_t *ptr;
} parent;
} vert;
} initial;
static struct {
bool left;
bool top;
} lock;
// initial set/unset
static void set_initial_view(swayc_t *view) {
initial.ptr = view;
initial.x = view->x;
initial.y = view->y;
initial.w = view->width;
initial.h = view->height;
}
static void set_initial_sibling(void) {
bool reset = true;
swayc_t *ws = swayc_active_workspace_for(initial.ptr);
if ((initial.horiz.ptr = get_swayc_in_direction_under(initial.ptr,
lock.left ? MOVE_RIGHT: MOVE_LEFT, ws))) {
initial.horiz.w = initial.horiz.ptr->width;
initial.horiz.parent.ptr = get_swayc_in_direction_under(initial.horiz.ptr,
lock.left ? MOVE_LEFT : MOVE_RIGHT, ws);
initial.horiz.parent.w = initial.horiz.parent.ptr->width;
reset = false;
}
if ((initial.vert.ptr = get_swayc_in_direction_under(initial.ptr,
lock.top ? MOVE_DOWN: MOVE_UP, ws))) {
initial.vert.h = initial.vert.ptr->height;
initial.vert.parent.ptr = get_swayc_in_direction_under(initial.vert.ptr,
lock.top ? MOVE_UP : MOVE_DOWN, ws);
initial.vert.parent.h = initial.vert.parent.ptr->height;
reset = false;
}
// If nothing will change just undo the mode
if (reset) {
pointer_state.mode = 0;
}
}
static void reset_initial_view(void) {
initial.ptr->x = initial.x;
initial.ptr->y = initial.y;
initial.ptr->width = initial.w;
initial.ptr->height = initial.h;
arrange_windows(initial.ptr, -1, -1);
pointer_state.mode = 0;
}
static void reset_initial_sibling(void) {
initial.horiz.ptr->width = initial.horiz.w;
initial.horiz.parent.ptr->width = initial.horiz.parent.w;
initial.vert.ptr->height = initial.vert.h;
initial.vert.parent.ptr->height = initial.vert.parent.h;
arrange_windows(initial.horiz.ptr->parent, -1, -1);
arrange_windows(initial.vert.ptr->parent, -1, -1);
pointer_state.mode = 0;
}
void pointer_position_set(struct wlc_point *new_origin, bool force_focus) {
struct wlc_point origin;
wlc_pointer_get_position(&origin);
pointer_state.delta.x = new_origin->x - origin.x;
pointer_state.delta.y = new_origin->y - origin.y;
wlc_pointer_set_position(new_origin);
// Update view under pointer
swayc_t *prev_view = pointer_state.view;
pointer_state.view = container_under_pointer();
// If pointer is in a mode, update it
if (pointer_state.mode) {
pointer_mode_update();
// Otherwise change focus if config is set
} else if (force_focus || (prev_view != pointer_state.view && config->focus_follows_mouse)) {
if (pointer_state.view && pointer_state.view->type == C_VIEW) {
set_focused_container(pointer_state.view);
}
}
}
void center_pointer_on(swayc_t *view) {
struct wlc_point new_origin;
new_origin.x = view->x + view->width/2;
new_origin.y = view->y + view->height/2;
pointer_position_set(&new_origin, true);
}
// Mode set left/right click
static void pointer_mode_set_dragging(void) {
switch (config->dragging_key) {
case M_LEFT_CLICK:
set_initial_view(pointer_state.left.view);
break;
case M_RIGHT_CLICK:
set_initial_view(pointer_state.right.view);
break;
}
if (initial.ptr->is_floating) {
pointer_state.mode = M_DRAGGING | M_FLOATING;
} else {
pointer_state.mode = M_DRAGGING | M_TILING;
// unset mode if we can't drag tile
if (initial.ptr->parent->type == C_WORKSPACE &&
initial.ptr->parent->children->length == 1) {
pointer_state.mode = 0;
}
}
}
static void pointer_mode_set_resizing(void) {
switch (config->resizing_key) {
case M_LEFT_CLICK:
set_initial_view(pointer_state.left.view);
break;
case M_RIGHT_CLICK:
set_initial_view(pointer_state.right.view);
break;
}
// Setup locking information
int midway_x = initial.ptr->x + initial.ptr->width/2;
int midway_y = initial.ptr->y + initial.ptr->height/2;
struct wlc_point origin;
wlc_pointer_get_position(&origin);
lock.left = origin.x > midway_x;
lock.top = origin.y > midway_y;
if (initial.ptr->is_floating) {
pointer_state.mode = M_RESIZING | M_FLOATING;
} else {
pointer_state.mode = M_RESIZING | M_TILING;
set_initial_sibling();
}
}
// Mode set/update/reset
void pointer_mode_set(uint32_t button, bool condition) {
// switch on drag/resize mode
switch (pointer_state.mode & (M_DRAGGING | M_RESIZING)) {
case M_DRAGGING:
// end drag mode when 'dragging' click is unpressed
if (config->dragging_key == M_LEFT_CLICK && !pointer_state.left.held) {
pointer_state.mode = 0;
} else if (config->dragging_key == M_RIGHT_CLICK && !pointer_state.right.held) {
pointer_state.mode = 0;
}
break;
case M_RESIZING:
// end resize mode when 'resizing' click is unpressed
if (config->resizing_key == M_LEFT_CLICK && !pointer_state.left.held) {
pointer_state.mode = 0;
} else if (config->resizing_key == M_RIGHT_CLICK && !pointer_state.right.held) {
pointer_state.mode = 0;
}
break;
// No mode case
default:
// return if failed condition, or no view
if (!condition || !pointer_state.view) {
break;
}
// Set mode depending on current button press
switch (button) {
// Start left-click mode
case M_LEFT_CLICK:
// if button release don't do anything
if (pointer_state.left.held) {
if (config->dragging_key == M_LEFT_CLICK) {
pointer_mode_set_dragging();
} else if (config->resizing_key == M_LEFT_CLICK) {
pointer_mode_set_resizing();
}
}
break;
// Start right-click mode
case M_RIGHT_CLICK:
// if button release don't do anyhting
if (pointer_state.right.held) {
if (config->dragging_key == M_RIGHT_CLICK) {
pointer_mode_set_dragging();
} else if (config->resizing_key == M_RIGHT_CLICK) {
pointer_mode_set_resizing();
}
}
break;
}
}
}
void pointer_mode_update(void) {
if (initial.ptr->type != C_VIEW) {
pointer_state.mode = 0;
return;
}
struct wlc_point origin;
wlc_pointer_get_position(&origin);
int dx = origin.x;
int dy = origin.y;
switch (pointer_state.mode) {
case M_FLOATING | M_DRAGGING:
// Update position
switch (config->dragging_key) {
case M_LEFT_CLICK:
dx -= pointer_state.left.x;
dy -= pointer_state.left.y;
break;
case M_RIGHT_CLICK:
dx -= pointer_state.right.x;
dy -= pointer_state.right.y;
break;
}
if (initial.x + dx != initial.ptr->x) {
initial.ptr->x = initial.x + dx;
}
if (initial.y + dy != initial.ptr->y) {
initial.ptr->y = initial.y + dy;
}
update_geometry(initial.ptr);
break;
case M_FLOATING | M_RESIZING:
switch (config->resizing_key) {
case M_LEFT_CLICK:
dx -= pointer_state.left.x;
dy -= pointer_state.left.y;
initial.ptr = pointer_state.left.view;
break;
case M_RIGHT_CLICK:
dx -= pointer_state.right.x;
dy -= pointer_state.right.y;
initial.ptr = pointer_state.right.view;
break;
}
if (lock.left) {
if (initial.w + dx > min_sane_w) {
initial.ptr->width = initial.w + dx;
}
} else { // lock.right
if (initial.w - dx > min_sane_w) {
initial.ptr->width = initial.w - dx;
initial.ptr->x = initial.x + dx;
}
}
if (lock.top) {
if (initial.h + dy > min_sane_h) {
initial.ptr->height = initial.h + dy;
}
} else { // lock.bottom
if (initial.h - dy > min_sane_h) {
initial.ptr->height = initial.h - dy;
initial.ptr->y = initial.y + dy;
}
}
update_geometry(initial.ptr);
break;
case M_TILING | M_DRAGGING:
// swap current view under pointer with dragged view
if (pointer_state.view && pointer_state.view->type == C_VIEW
&& pointer_state.view != initial.ptr
&& !pointer_state.view->is_floating) {
// Swap them around
swap_container(pointer_state.view, initial.ptr);
swap_geometry(pointer_state.view, initial.ptr);
update_geometry(pointer_state.view);
update_geometry(initial.ptr);
// Set focus back to initial view
set_focused_container(initial.ptr);
// Arrange the windows
arrange_windows(&root_container, -1, -1);
}
break;
case M_TILING | M_RESIZING:
switch (config->resizing_key) {
case M_LEFT_CLICK:
dx -= pointer_state.left.x;
dy -= pointer_state.left.y;
break;
case M_RIGHT_CLICK:
dx -= pointer_state.right.x;
dy -= pointer_state.right.y;
break;
}
// resize if we can
if (initial.horiz.ptr) {
if (lock.left) {
// Check whether its fine to resize
if (initial.w + dx > min_sane_w && initial.horiz.w - dx > min_sane_w) {
initial.horiz.ptr->width = initial.horiz.w - dx;
initial.horiz.parent.ptr->width = initial.horiz.parent.w + dx;
}
} else { // lock.right
if (initial.w - dx > min_sane_w && initial.horiz.w + dx > min_sane_w) {
initial.horiz.ptr->width = initial.horiz.w + dx;
initial.horiz.parent.ptr->width = initial.horiz.parent.w - dx;
}
}
arrange_windows(initial.horiz.ptr->parent, -1, -1);
}
if (initial.vert.ptr) {
if (lock.top) {
if (initial.h + dy > min_sane_h && initial.vert.h - dy > min_sane_h) {
initial.vert.ptr->height = initial.vert.h - dy;
initial.vert.parent.ptr->height = initial.vert.parent.h + dy;
}
} else { // lock.bottom
if (initial.h - dy > min_sane_h && initial.vert.h + dy > min_sane_h) {
initial.vert.ptr->height = initial.vert.h + dy;
initial.vert.parent.ptr->height = initial.vert.parent.h - dy;
}
}
arrange_windows(initial.vert.ptr->parent, -1, -1);
}
default:
return;
}
}
void pointer_mode_reset(void) {
switch (pointer_state.mode) {
case M_FLOATING | M_RESIZING:
case M_FLOATING | M_DRAGGING:
reset_initial_view();
break;
case M_TILING | M_RESIZING:
(void) reset_initial_sibling;
break;
case M_TILING | M_DRAGGING:
default:
break;
}
}