gri3-wm/src/x.c

638 lines
22 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/*
* vim:ts=4:sw=4:expandtab
*/
#include "all.h"
/* Stores the X11 window ID of the currently focused window */
static xcb_window_t focused_id = XCB_NONE;
/*
* Describes the X11 state we may modify (map state, position, window stack).
* There is one entry per container. The state represents the current situation
* as X11 sees it (with the exception of the order in the state_head CIRCLEQ,
* which represents the order that will be pushed to X11, while old_state_head
* represents the current order). It will be updated in x_push_changes().
*
*/
typedef struct con_state {
xcb_window_t id;
bool mapped;
/* For reparenting, we have a flag (need_reparent) and the X ID of the old
* frame this window was in. The latter is necessary because we need to
* ignore UnmapNotify events (by changing the window event mask). */
bool need_reparent;
xcb_window_t old_frame;
Rect rect;
Rect window_rect;
bool initial;
char *name;
CIRCLEQ_ENTRY(con_state) state;
CIRCLEQ_ENTRY(con_state) old_state;
} con_state;
CIRCLEQ_HEAD(state_head, con_state) state_head =
CIRCLEQ_HEAD_INITIALIZER(state_head);
CIRCLEQ_HEAD(old_state_head, con_state) old_state_head =
CIRCLEQ_HEAD_INITIALIZER(old_state_head);
/*
* Returns the container state for the given frame. This function always
* returns a container state (otherwise, there is a bug in the code and the
* container state of a container for which x_con_init() was not called was
* requested).
*
*/
static con_state *state_for_frame(xcb_window_t window) {
con_state *state;
CIRCLEQ_FOREACH(state, &state_head, state)
if (state->id == window)
return state;
/* TODO: better error handling? */
ELOG("No state found\n");
assert(false);
return NULL;
}
/*
* Initializes the X11 part for the given container. Called exactly once for
* every container from con_new().
*
*/
void x_con_init(Con *con) {
/* TODO: maybe create the window when rendering first? we could then even
* get the initial geometry right */
uint32_t mask = 0;
uint32_t values[2];
/* our own frames should not be managed */
mask |= XCB_CW_OVERRIDE_REDIRECT;
values[0] = 1;
/* We want to know when… */
mask |= XCB_CW_EVENT_MASK;
values[1] = FRAME_EVENT_MASK;
Rect dims = { -15, -15, 10, 10 };
con->frame = create_window(conn, dims, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCURSOR_CURSOR_POINTER, false, mask, values);
con->gc = xcb_generate_id(conn);
xcb_create_gc(conn, con->gc, con->frame, 0, 0);
struct con_state *state = scalloc(sizeof(struct con_state));
state->id = con->frame;
state->mapped = false;
state->initial = true;
CIRCLEQ_INSERT_HEAD(&state_head, state, state);
CIRCLEQ_INSERT_HEAD(&old_state_head, state, old_state);
LOG("adding new state for window id 0x%08x\n", state->id);
}
/*
* Re-initializes the associated X window state for this container. You have
* to call this when you assign a client to an empty container to ensure that
* its state gets updated correctly.
*
*/
void x_reinit(Con *con) {
struct con_state *state;
if ((state = state_for_frame(con->frame)) == NULL) {
ELOG("window state not found\n");
return;
}
LOG("resetting state %p to initial\n", state);
state->initial = true;
memset(&(state->window_rect), 0, sizeof(Rect));
}
/*
* Reparents the child window of the given container (necessary for sticky
* containers). The reparenting happens in the next call of x_push_changes().
*
*/
void x_reparent_child(Con *con, Con *old) {
struct con_state *state;
if ((state = state_for_frame(con->frame)) == NULL) {
ELOG("window state for con not found\n");
return;
}
state->need_reparent = true;
state->old_frame = old->frame;
}
/*
* Moves a child window from Container src to Container dest.
*
*/
void x_move_win(Con *src, Con *dest) {
struct con_state *state_src, *state_dest;
if ((state_src = state_for_frame(src->frame)) == NULL) {
ELOG("window state for src not found\n");
return;
}
if ((state_dest = state_for_frame(dest->frame)) == NULL) {
ELOG("window state for dest not found\n");
return;
}
Rect zero;
memset(&zero, 0, sizeof(Rect));
if (memcmp(&(state_dest->window_rect), &(zero), sizeof(Rect)) == 0) {
memcpy(&(state_dest->window_rect), &(state_src->window_rect), sizeof(Rect));
LOG("COPYING RECT\n");
}
}
/*
* Kills the window decoration associated with the given container.
*
*/
void x_con_kill(Con *con) {
con_state *state;
xcb_destroy_window(conn, con->frame);
state = state_for_frame(con->frame);
CIRCLEQ_REMOVE(&state_head, state, state);
CIRCLEQ_REMOVE(&old_state_head, state, old_state);
}
/*
* Returns true if the client supports the given protocol atom (like WM_DELETE_WINDOW)
*
*/
static bool window_supports_protocol(xcb_window_t window, xcb_atom_t atom) {
xcb_get_property_cookie_t cookie;
xcb_get_wm_protocols_reply_t protocols;
bool result = false;
cookie = xcb_get_wm_protocols_unchecked(conn, window, atoms[WM_PROTOCOLS]);
if (xcb_get_wm_protocols_reply(conn, cookie, &protocols, NULL) != 1)
return false;
/* Check if the clients protocols have the requested atom set */
for (uint32_t i = 0; i < protocols.atoms_len; i++)
if (protocols.atoms[i] == atom)
result = true;
xcb_get_wm_protocols_reply_wipe(&protocols);
return result;
}
/*
* Kills the given X11 window using WM_DELETE_WINDOW (if supported).
*
*/
void x_window_kill(xcb_window_t window) {
/* if this window does not support WM_DELETE_WINDOW, we kill it the hard way */
if (!window_supports_protocol(window, atoms[WM_DELETE_WINDOW])) {
LOG("Killing window the hard way\n");
xcb_kill_client(conn, window);
return;
}
xcb_client_message_event_t ev;
memset(&ev, 0, sizeof(xcb_client_message_event_t));
ev.response_type = XCB_CLIENT_MESSAGE;
ev.window = window;
ev.type = atoms[WM_PROTOCOLS];
ev.format = 32;
ev.data.data32[0] = atoms[WM_DELETE_WINDOW];
ev.data.data32[1] = XCB_CURRENT_TIME;
LOG("Sending WM_DELETE to the client\n");
xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char*)&ev);
xcb_flush(conn);
}
/*
* Draws the decoration of the given container onto its parent.
*
*/
void x_draw_decoration(Con *con) {
/* This code needs to run for:
* • leaf containers
* • non-leaf containers which are in a stacking container
*
* It does not need to run for:
* • floating containers (they dont have a decoration)
*/
if ((!con_is_leaf(con) && con->parent->layout != L_STACKED) ||
con->type == CT_FLOATING_CON)
return;
DLOG("decoration should be rendered for con %p\n", con);
/* 1: find out which colors to use */
struct Colortriple *color;
if (con->urgent)
color = &config.client.urgent;
else if (con == focused)
color = &config.client.focused;
else if (con == TAILQ_FIRST(&(con->parent->focus_head)))
color = &config.client.focused_inactive;
else
color = &config.client.unfocused;
Con *parent = con->parent;
int border_style = con_border_style(con);
/* 2: draw a rectangle in border color around the client */
if (border_style != BS_NONE && con_is_leaf(con)) {
Rect br = con_border_style_rect(con);
Rect *r = &(con->rect);
#if 0
DLOG("con->rect spans %d x %d\n", con->rect.width, con->rect.height);
DLOG("border_rect spans (%d, %d) with %d x %d\n", border_rect.x, border_rect.y, border_rect.width, border_rect.height);
DLOG("window_rect spans (%d, %d) with %d x %d\n", con->window_rect.x, con->window_rect.y, con->window_rect.width, con->window_rect.height);
#endif
/* These rectangles represents the border around the child window
* (left, bottom and right part). We dont just fill the whole
* rectangle because some childs are not freely resizable and we want
* their background color to "shine through". */
xcb_change_gc_single(conn, con->gc, XCB_GC_FOREGROUND, color->background);
xcb_rectangle_t borders[] = {
{ 0, 0, br.x, r->height },
{ 0, r->height + br.height + br.y, r->width, r->height },
{ r->width + br.width + br.x, 0, r->width, r->height }
};
xcb_poly_fill_rectangle(conn, con->frame, con->gc, 3, borders);
/* 1pixel border needs an additional line at the top */
if (border_style == BS_1PIXEL) {
xcb_rectangle_t topline = { br.x, 0, con->rect.width + br.width + br.x, br.y };
xcb_poly_fill_rectangle(conn, con->frame, con->gc, 1, &topline);
}
}
/* if this is a borderless/1pixel window, we dont * need to render the
* decoration. */
if (border_style != BS_NORMAL) {
DLOG("border style not BS_NORMAL, aborting rendering of decoration\n");
return;
}
/* 3: paint the bar */
xcb_change_gc_single(conn, parent->gc, XCB_GC_FOREGROUND, color->background);
xcb_rectangle_t drect = { con->deco_rect.x, con->deco_rect.y, con->deco_rect.width, con->deco_rect.height };
xcb_poly_fill_rectangle(conn, parent->frame, parent->gc, 1, &drect);
/* 4: draw the two lines in border color */
xcb_draw_line(conn, parent->frame, parent->gc, color->border,
con->deco_rect.x, /* x */
con->deco_rect.y, /* y */
con->deco_rect.x + con->deco_rect.width, /* to_x */
con->deco_rect.y); /* to_y */
xcb_draw_line(conn, parent->frame, parent->gc, color->border,
con->deco_rect.x, /* x */
con->deco_rect.y + con->deco_rect.height - 1, /* y */
con->deco_rect.x + con->deco_rect.width, /* to_x */
con->deco_rect.y + con->deco_rect.height - 1); /* to_y */
/* 5: draw the title */
i3Font *font = load_font(conn, config.font);
uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
uint32_t values[] = { color->text, color->background, font->id };
xcb_change_gc(conn, parent->gc, mask, values);
int text_offset_y = font->height + (con->deco_rect.height - font->height) / 2 - 1;
struct Window *win = con->window;
if (win == NULL || win->name_x == NULL) {
/* this is a non-leaf container, we need to make up a good description */
// TODO: use a good description instead of just "another container"
xcb_image_text_8(
conn,
strlen("another container"),
parent->frame,
parent->gc,
con->deco_rect.x + 2,
con->deco_rect.y + text_offset_y,
"another container"
);
return;
}
int indent_level = 0,
indent_mult = 0;
Con *il_parent = con->parent;
if (il_parent->type != L_STACKED) {
while (1) {
DLOG("il_parent = %p, layout = %d\n", il_parent, il_parent->layout);
if (il_parent->layout == L_STACKED)
indent_level++;
if (il_parent->type == CT_WORKSPACE)
break;
il_parent = il_parent->parent;
indent_mult++;
}
}
DLOG("indent_level = %d, indent_mult = %d\n", indent_level, indent_mult);
int indent_px = (indent_level * 5) * indent_mult;
if (win->uses_net_wm_name)
xcb_image_text_16(
conn,
win->name_len,
parent->frame,
parent->gc,
con->deco_rect.x + 2 + indent_px,
con->deco_rect.y + text_offset_y,
(xcb_char2b_t*)win->name_x
);
else
xcb_image_text_8(
conn,
win->name_len,
parent->frame,
parent->gc,
con->deco_rect.x + 2 + indent_px,
con->deco_rect.y + text_offset_y,
win->name_x
);
}
/*
* This function pushes the properties of each node of the layout tree to
* X11 if they have changed (like the map state, position of the window, …).
* It recursively traverses all children of the given node.
*
*/
static void x_push_node(Con *con) {
Con *current;
con_state *state;
Rect rect = con->rect;
LOG("Pushing changes for node %p / %s\n", con, con->name);
state = state_for_frame(con->frame);
if (state->name != NULL) {
DLOG("pushing name %s for con %p\n", state->name, con);
xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->frame,
WM_NAME, STRING, 8, strlen(state->name), state->name);
FREE(state->name);
}
if (con->window == NULL) {
/* Calculate the height of all window decorations which will be drawn on to
* this frame. */
uint32_t max_y = 0, max_height = 0;
TAILQ_FOREACH(current, &(con->nodes_head), nodes) {
Rect *dr = &(current->deco_rect);
if (dr->y >= max_y && dr->height >= max_height) {
max_y = dr->y;
max_height = dr->height;
}
}
rect.height = max_y + max_height;
if (rect.height == 0) {
DLOG("Unmapping container because it does not contain anything atm.\n");
con->mapped = false;
}
}
/* reparent the child window (when the window was moved due to a sticky
* container) */
if (state->need_reparent && con->window != NULL) {
LOG("Reparenting child window\n");
/* Temporarily set the event masks to XCB_NONE so that we wont get
* UnmapNotify events (otherwise the handler would close the container).
* These events are generated automatically when reparenting. */
uint32_t values[] = { XCB_NONE };
xcb_change_window_attributes(conn, state->old_frame, XCB_CW_EVENT_MASK, values);
xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
xcb_reparent_window(conn, con->window->id, con->frame, 0, 0);
values[0] = FRAME_EVENT_MASK;
xcb_change_window_attributes(conn, state->old_frame, XCB_CW_EVENT_MASK, values);
values[0] = CHILD_EVENT_MASK;
xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
state->old_frame = XCB_NONE;
state->need_reparent = false;
con->ignore_unmap++;
DLOG("ignore_unmap for reparenting of con %p (win 0x%08x) is now %d\n",
con, con->window->id, con->ignore_unmap);
}
bool fake_notify = false;
/* set new position if rect changed */
if (memcmp(&(state->rect), &rect, sizeof(Rect)) != 0) {
LOG("setting rect (%d, %d, %d, %d)\n", rect.x, rect.y, rect.width, rect.height);
xcb_set_window_rect(conn, con->frame, rect);
memcpy(&(state->rect), &rect, sizeof(Rect));
fake_notify = true;
}
/* dito, but for child windows */
if (con->window != NULL &&
memcmp(&(state->window_rect), &(con->window_rect), sizeof(Rect)) != 0) {
LOG("setting window rect (%d, %d, %d, %d)\n",
con->window_rect.x, con->window_rect.y, con->window_rect.width, con->window_rect.height);
xcb_set_window_rect(conn, con->window->id, con->window_rect);
memcpy(&(state->window_rect), &(con->window_rect), sizeof(Rect));
fake_notify = true;
}
/* Map if map state changed, also ensure that the child window
* is changed if we are mapped *and* in initial state (meaning the
* container was empty before, but now got a child). Unmaps are handled in
* x_push_node_unmaps(). */
if ((state->mapped != con->mapped || (con->mapped && state->initial)) &&
con->mapped) {
xcb_void_cookie_t cookie;
if (con->window != NULL) {
/* Set WM_STATE_NORMAL because GTK applications dont want to
* drag & drop if we dont. Also, xprop(1) needs it. */
long data[] = { XCB_WM_STATE_NORMAL, XCB_NONE };
xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
atoms[WM_STATE], atoms[WM_STATE], 32, 2, data);
}
if (state->initial && con->window != NULL) {
cookie = xcb_map_window(conn, con->window->id);
LOG("mapping child window (serial %d)\n", cookie.sequence);
/* Ignore enter_notifies which are generated when mapping */
add_ignore_event(cookie.sequence);
}
cookie = xcb_map_window(conn, con->frame);
LOG("mapping container (serial %d)\n", cookie.sequence);
/* Ignore enter_notifies which are generated when mapping */
add_ignore_event(cookie.sequence);
state->mapped = con->mapped;
}
if (fake_notify) {
LOG("Sending fake configure notify\n");
fake_absolute_configure_notify(con);
}
/* handle all children and floating windows of this node */
TAILQ_FOREACH(current, &(con->nodes_head), nodes)
x_push_node(current);
TAILQ_FOREACH(current, &(con->floating_head), floating_windows)
x_push_node(current);
if (con->type != CT_ROOT && con->type != CT_OUTPUT)
x_draw_decoration(con);
}
/*
* Same idea as in x_push_node(), but this function only unmaps windows. It is
* necessary to split this up to handle new fullscreen clients properly: The
* new window needs to be mapped and focus needs to be set *before* the
* underlying windows are unmapped. Otherwise, focus will revert to the
* PointerRoot and will then be set to the new window, generating unnecessary
* FocusIn/FocusOut events.
*
*/
static void x_push_node_unmaps(Con *con) {
Con *current;
con_state *state;
LOG("Pushing changes (with unmaps) for node %p / %s\n", con, con->name);
state = state_for_frame(con->frame);
/* map/unmap if map state changed, also ensure that the child window
* is changed if we are mapped *and* in initial state (meaning the
* container was empty before, but now got a child) */
if ((state->mapped != con->mapped || (con->mapped && state->initial)) &&
!con->mapped) {
xcb_void_cookie_t cookie;
if (con->window != NULL) {
/* Set WM_STATE_WITHDRAWN, it seems like Java apps need it */
long data[] = { XCB_WM_STATE_WITHDRAWN, XCB_NONE };
xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
atoms[WM_STATE], atoms[WM_STATE], 32, 2, data);
}
cookie = xcb_unmap_window(conn, con->frame);
LOG("unmapping container (serial %d)\n", cookie.sequence);
/* we need to increase ignore_unmap for this container (if it
* contains a window) and for every window "under" this one which
* contains a window */
if (con->window != NULL) {
con->ignore_unmap++;
DLOG("ignore_unmap for con %p (frame 0x%08x) now %d\n", con, con->frame, con->ignore_unmap);
}
/* Ignore enter_notifies which are generated when unmapping */
add_ignore_event(cookie.sequence);
state->mapped = con->mapped;
}
/* handle all children and floating windows of this node */
TAILQ_FOREACH(current, &(con->nodes_head), nodes)
x_push_node_unmaps(current);
TAILQ_FOREACH(current, &(con->floating_head), floating_windows)
x_push_node_unmaps(current);
}
/*
* Pushes all changes (state of each node, see x_push_node() and the window
* stack) to X11.
*
*/
void x_push_changes(Con *con) {
con_state *state;
LOG("\n\n PUSHING CHANGES\n\n");
x_push_node(con);
LOG("-- PUSHING WINDOW STACK --\n");
bool order_changed = false;
/* X11 correctly represents the stack if we push it from bottom to top */
CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
LOG("stack: 0x%08x\n", state->id);
con_state *prev = CIRCLEQ_PREV(state, state);
con_state *old_prev = CIRCLEQ_PREV(state, old_state);
if (prev != old_prev)
order_changed = true;
if ((state->initial || order_changed) && prev != CIRCLEQ_END(&state_head)) {
LOG("Stacking 0x%08x above 0x%08x\n", prev->id, state->id);
uint32_t mask = 0;
mask |= XCB_CONFIG_WINDOW_SIBLING;
mask |= XCB_CONFIG_WINDOW_STACK_MODE;
uint32_t values[] = {state->id, XCB_STACK_MODE_ABOVE};
xcb_configure_window(conn, prev->id, mask, values);
}
state->initial = false;
}
xcb_window_t to_focus = focused->frame;
if (focused->window != NULL)
to_focus = focused->window->id;
if (focused_id != to_focus) {
LOG("Updating focus (focused: %p / %s)\n", focused, focused->name);
xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, to_focus, XCB_CURRENT_TIME);
focused_id = to_focus;
}
xcb_flush(conn);
LOG("\n\n ENDING CHANGES\n\n");
x_push_node_unmaps(con);
/* save the current stack as old stack */
CIRCLEQ_FOREACH(state, &state_head, state) {
CIRCLEQ_REMOVE(&old_state_head, state, old_state);
CIRCLEQ_INSERT_TAIL(&old_state_head, state, old_state);
}
CIRCLEQ_FOREACH(state, &old_state_head, old_state) {
LOG("old stack: 0x%08x\n", state->id);
}
}
/*
* Raises the specified container in the internal stack of X windows. The
* next call to x_push_changes() will make the change visible in X11.
*
*/
void x_raise_con(Con *con) {
con_state *state;
LOG("raising in new stack: %p / %s\n", con, con->name);
state = state_for_frame(con->frame);
CIRCLEQ_REMOVE(&state_head, state, state);
CIRCLEQ_INSERT_HEAD(&state_head, state, state);
}
/*
* Sets the WM_NAME property (so, no UTF8, but used only for debugging anyways)
* of the given name. Used for properly tagging the windows for easily spotting
* i3 windows in xwininfo -root -all.
*
*/
void x_set_name(Con *con, const char *name) {
struct con_state *state;
if ((state = state_for_frame(con->frame)) == NULL) {
ELOG("window state not found\n");
return;
}
FREE(state->name);
state->name = sstrdup(name);
}