gri3-wm/src/floating.c

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/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
*
* floating.c: Floating windows.
*
*/
#include "all.h"
extern xcb_connection_t *conn;
void floating_enable(Con *con, bool automatic) {
bool set_focus = (con == focused);
if (con->parent && con->parent->type == CT_DOCKAREA) {
LOG("Container is a dock window, not enabling floating mode.\n");
return;
}
if (con_is_floating(con)) {
LOG("Container is already in floating mode, not doing anything.\n");
return;
}
/* 1: If the container is a workspace container, we need to create a new
* split-container with the same orientation and make that one floating. We
* cannot touch the workspace container itself because floating containers
* are children of the workspace. */
if (con->type == CT_WORKSPACE) {
LOG("This is a workspace, creating new container around content\n");
if (con_num_children(con) == 0) {
LOG("Workspace is empty, aborting\n");
return;
}
/* TODO: refactor this with src/con.c:con_set_layout */
Con *new = con_new(NULL, NULL);
new->parent = con;
new->orientation = con->orientation;
/* since the new container will be set into floating mode directly
* afterwards, we need to copy the workspace rect. */
memcpy(&(new->rect), &(con->rect), sizeof(Rect));
Con *old_focused = TAILQ_FIRST(&(con->focus_head));
if (old_focused == TAILQ_END(&(con->focus_head)))
old_focused = NULL;
/* 4: move the existing cons of this workspace below the new con */
DLOG("Moving cons\n");
Con *child;
while (!TAILQ_EMPTY(&(con->nodes_head))) {
child = TAILQ_FIRST(&(con->nodes_head));
con_detach(child);
con_attach(child, new, true);
}
/* 4: attach the new split container to the workspace */
DLOG("Attaching new split to ws\n");
con_attach(new, con, false);
if (old_focused)
con_focus(old_focused);
con = new;
set_focus = false;
}
/* 1: detach the container from its parent */
/* TODO: refactor this with tree_close() */
TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
con_fix_percent(con->parent);
/* 2: create a new container to render the decoration on, add
* it as a floating window to the workspace */
Con *nc = con_new(NULL, NULL);
/* we need to set the parent afterwards instead of passing it as an
* argument to con_new() because nc would be inserted into the tiling layer
* otherwise. */
Con *ws = con_get_workspace(con);
nc->parent = ws;
/* check if the parent container is empty and close it if so */
if ((con->parent->type == CT_CON || con->parent->type == CT_FLOATING_CON) && con_num_children(con->parent) == 0) {
DLOG("Old container empty after setting this child to floating, closing\n");
tree_close(con->parent, DONT_KILL_WINDOW, false, false);
}
char *name;
sasprintf(&name, "[i3 con] floatingcon around %p", con);
x_set_name(nc, name);
free(name);
/* find the height for the decorations */
int deco_height = config.font.height + 5;
DLOG("Original rect: (%d, %d) with %d x %d\n", con->rect.x, con->rect.y, con->rect.width, con->rect.height);
DLOG("Geometry = (%d, %d) with %d x %d\n", con->geometry.x, con->geometry.y, con->geometry.width, con->geometry.height);
Rect zero = { 0, 0, 0, 0 };
nc->rect = con->geometry;
/* If the geometry was not set (split containers), we need to determine a
* sensible one by combining the geometry of all children */
if (memcmp(&(nc->rect), &zero, sizeof(Rect)) == 0) {
DLOG("Geometry not set, combining children\n");
Con *child;
TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
DLOG("child geometry: %d x %d\n", child->geometry.width, child->geometry.height);
nc->rect.width += child->geometry.width;
nc->rect.height = max(nc->rect.height, child->geometry.height);
}
}
/* Raise the width/height to at least 75x50 (minimum size for windows) */
nc->rect.width = max(nc->rect.width, 75);
nc->rect.height = max(nc->rect.height, 50);
/* add pixels for the decoration */
/* TODO: dont add them when the user automatically puts new windows into
* 1pixel/borderless mode */
nc->rect.height += deco_height + 2;
nc->rect.width += 4;
/* Honor the X11 border */
nc->rect.height += con->border_width * 2;
nc->rect.width += con->border_width * 2;
/* Some clients (like GIMPs color picker window) get mapped
* to (0, 0), so we push them to a reasonable position
* (centered over their leader) */
if (nc->rect.x == 0 && nc->rect.y == 0) {
Con *leader;
if (con->window && con->window->leader != XCB_NONE &&
(leader = con_by_window_id(con->window->leader)) != NULL) {
DLOG("Centering above leader\n");
nc->rect.x = leader->rect.x + (leader->rect.width / 2) - (nc->rect.width / 2);
nc->rect.y = leader->rect.y + (leader->rect.height / 2) - (nc->rect.height / 2);
} else {
/* center the window on workspace as fallback */
nc->rect.x = ws->rect.x + (ws->rect.width / 2) - (nc->rect.width / 2);
nc->rect.y = ws->rect.y + (ws->rect.height / 2) - (nc->rect.height / 2);
}
}
/* Sanity check: Are the coordinates on the appropriate output? If not, we
* need to change them */
Output *current_output = get_output_containing(nc->rect.x, nc->rect.y);
Con *correct_output = con_get_output(ws);
if (!current_output || current_output->con != correct_output) {
DLOG("This floating window is on the wrong output, fixing coordinates (currently (%d, %d))\n",
nc->rect.x, nc->rect.y);
/* Take the relative coordinates of the current output, then add them
* to the coordinate space of the correct output */
uint32_t rel_x = (nc->rect.x - (current_output ? current_output->con->rect.x : 0));
uint32_t rel_y = (nc->rect.y - (current_output ? current_output->con->rect.y : 0));
nc->rect.x = correct_output->rect.x + rel_x;
nc->rect.y = correct_output->rect.y + rel_y;
}
DLOG("Floating rect: (%d, %d) with %d x %d\n", nc->rect.x, nc->rect.y, nc->rect.width, nc->rect.height);
nc->orientation = NO_ORIENTATION;
nc->type = CT_FLOATING_CON;
TAILQ_INSERT_TAIL(&(ws->floating_head), nc, floating_windows);
TAILQ_INSERT_TAIL(&(ws->focus_head), nc, focused);
/* 3: attach the child to the new parent container */
con->parent = nc;
con->percent = 1.0;
con->floating = FLOATING_USER_ON;
/* 4: set the border style as specified with new_float */
if (automatic)
con->border_style = config.default_floating_border;
TAILQ_INSERT_TAIL(&(nc->nodes_head), con, nodes);
TAILQ_INSERT_TAIL(&(nc->focus_head), con, focused);
/* render the cons to get initial window_rect correct */
render_con(nc, false);
render_con(con, false);
if (set_focus)
con_focus(con);
/* Check if we need to re-assign it to a different workspace because of its
* coordinates and exit if that was done successfully. */
if (floating_maybe_reassign_ws(nc))
return;
/* Sanitize coordinates: Check if they are on any output */
if (get_output_containing(nc->rect.x, nc->rect.y) != NULL)
return;
ELOG("No output found at destination coordinates, centering floating window on current ws\n");
nc->rect.x = ws->rect.x + (ws->rect.width / 2) - (nc->rect.width / 2);
nc->rect.y = ws->rect.y + (ws->rect.height / 2) - (nc->rect.height / 2);
}
void floating_disable(Con *con, bool automatic) {
if (!con_is_floating(con)) {
LOG("Container isn't floating, not doing anything.\n");
return;
}
Con *ws = con_get_workspace(con);
/* 1: detach from parent container */
TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
/* 2: kill parent container */
TAILQ_REMOVE(&(con->parent->parent->floating_head), con->parent, floating_windows);
TAILQ_REMOVE(&(con->parent->parent->focus_head), con->parent, focused);
tree_close(con->parent, DONT_KILL_WINDOW, false, false);
/* 3: re-attach to the parent of the currently focused con on the workspace
* this floating con was on */
Con *focused = con_descend_tiling_focused(ws);
/* if there is no other container on this workspace, focused will be the
* workspace itself */
if (focused->type == CT_WORKSPACE)
con->parent = focused;
else con->parent = focused->parent;
/* con_fix_percent will adjust the percent value */
con->percent = 0.0;
TAILQ_INSERT_TAIL(&(con->parent->nodes_head), con, nodes);
TAILQ_INSERT_TAIL(&(con->parent->focus_head), con, focused);
con->floating = FLOATING_USER_OFF;
con_fix_percent(con->parent);
// TODO: dont influence focus handling when Con was not focused before.
con_focus(con);
}
/*
* Toggles floating mode for the given container.
*
* If the automatic flag is set to true, this was an automatic update by a change of the
* window class from the application which can be overwritten by the user.
*
*/
void toggle_floating_mode(Con *con, bool automatic) {
/* see if the client is already floating */
if (con_is_floating(con)) {
LOG("already floating, re-setting to tiling\n");
floating_disable(con, automatic);
return;
}
floating_enable(con, automatic);
}
/*
* Raises the given container in the list of floating containers
*
*/
void floating_raise_con(Con *con) {
DLOG("Raising floating con %p / %s\n", con, con->name);
TAILQ_REMOVE(&(con->parent->floating_head), con, floating_windows);
TAILQ_INSERT_TAIL(&(con->parent->floating_head), con, floating_windows);
}
/*
* Checks if cons coordinates are within its workspace and re-assigns it to
* the actual workspace if not.
*
*/
bool floating_maybe_reassign_ws(Con *con) {
Output *output = get_output_containing(
con->rect.x + (con->rect.width / 2),
con->rect.y + (con->rect.height / 2));
if (!output) {
ELOG("No output found at destination coordinates?\n");
return false;
}
if (con_get_output(con) == output->con) {
DLOG("still the same ws\n");
return false;
}
DLOG("Need to re-assign!\n");
Con *content = output_get_content(output->con);
Con *ws = TAILQ_FIRST(&(content->focus_head));
DLOG("Moving con %p / %s to workspace %p / %s\n", con, con->name, ws, ws->name);
con_move_to_workspace(con, ws, false, true);
con_focus(con_descend_focused(con));
return true;
}
DRAGGING_CB(drag_window_callback) {
const struct xcb_button_press_event_t *event = extra;
/* Reposition the client correctly while moving */
con->rect.x = old_rect->x + (new_x - event->root_x);
con->rect.y = old_rect->y + (new_y - event->root_y);
render_con(con, false);
x_push_node(con);
xcb_flush(conn);
/* Check if we cross workspace boundaries while moving */
if (!floating_maybe_reassign_ws(con))
return;
tree_render();
}
/*
* Called when the user clicked on the titlebar of a floating window.
* Calls the drag_pointer function with the drag_window callback
*
*/
void floating_drag_window(Con *con, const xcb_button_press_event_t *event) {
DLOG("floating_drag_window\n");
/* Push changes before dragging, so that the window gets raised now and not
* after the user releases the mouse button */
tree_render();
/* Drag the window */
drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, drag_window_callback, event);
tree_render();
}
/*
* This is an ugly data structure which we need because there is no standard
* way of having nested functions (only available as a gcc extension at the
* moment, clang doesnt support it) or blocks (only available as a clang
* extension and only on Mac OS X systems at the moment).
*
*/
struct resize_window_callback_params {
const border_t corner;
const bool proportional;
const xcb_button_press_event_t *event;
};
DRAGGING_CB(resize_window_callback) {
const struct resize_window_callback_params *params = extra;
const xcb_button_press_event_t *event = params->event;
border_t corner = params->corner;
int32_t dest_x = con->rect.x;
int32_t dest_y = con->rect.y;
uint32_t dest_width;
uint32_t dest_height;
double ratio = (double) old_rect->width / old_rect->height;
/* First guess: We resize by exactly the amount the mouse moved,
* taking into account in which corner the client was grabbed */
if (corner & BORDER_LEFT)
dest_width = old_rect->width - (new_x - event->root_x);
else dest_width = old_rect->width + (new_x - event->root_x);
if (corner & BORDER_TOP)
dest_height = old_rect->height - (new_y - event->root_y);
else dest_height = old_rect->height + (new_y - event->root_y);
/* Obey minimum window size */
Rect minimum = con_minimum_size(con);
dest_width = max(dest_width, minimum.width);
dest_height = max(dest_height, minimum.height);
/* User wants to keep proportions, so we may have to adjust our values */
if (params->proportional) {
dest_width = max(dest_width, (int) (dest_height * ratio));
dest_height = max(dest_height, (int) (dest_width / ratio));
}
/* If not the lower right corner is grabbed, we must also reposition
* the client by exactly the amount we resized it */
if (corner & BORDER_LEFT)
dest_x = old_rect->x + (old_rect->width - dest_width);
if (corner & BORDER_TOP)
dest_y = old_rect->y + (old_rect->height - dest_height);
con->rect = (Rect) { dest_x, dest_y, dest_width, dest_height };
/* TODO: dont re-render the whole tree just because we change
* coordinates of a floating window */
tree_render();
x_push_changes(croot);
}
/*
* Called when the user clicked on a floating window while holding the
* floating_modifier and the right mouse button.
* Calls the drag_pointer function with the resize_window callback
*
*/
void floating_resize_window(Con *con, const bool proportional,
const xcb_button_press_event_t *event) {
DLOG("floating_resize_window\n");
/* corner saves the nearest corner to the original click. It contains
* a bitmask of the nearest borders (BORDER_LEFT, BORDER_RIGHT, …) */
border_t corner = 0;
if (event->event_x <= (con->rect.width / 2))
corner |= BORDER_LEFT;
else corner |= BORDER_RIGHT;
if (event->event_y <= (con->rect.height / 2))
corner |= BORDER_TOP;
else corner |= BORDER_BOTTOM;
struct resize_window_callback_params params = { corner, proportional, event };
drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, resize_window_callback, &params);
}
/*
* This function grabs your pointer and lets you drag stuff around (borders).
* Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
* and the given callback will be called with the parameters specified (client,
* border on which the click originally was), the original rect of the client,
* the event and the new coordinates (x, y).
*
*/
void drag_pointer(Con *con, const xcb_button_press_event_t *event, xcb_window_t
confine_to, border_t border, callback_t callback, const void *extra)
{
uint32_t new_x, new_y;
Rect old_rect;
if (con != NULL)
memcpy(&old_rect, &(con->rect), sizeof(Rect));
/* Grab the pointer */
xcb_grab_pointer_cookie_t cookie;
xcb_grab_pointer_reply_t *reply;
cookie = xcb_grab_pointer(conn,
false, /* get all pointer events specified by the following mask */
root, /* grab the root window */
XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
XCB_GRAB_MODE_ASYNC, /* keyboard mode */
confine_to, /* confine_to = in which window should the cursor stay */
XCB_NONE, /* dont display a special cursor */
XCB_CURRENT_TIME);
if ((reply = xcb_grab_pointer_reply(conn, cookie, NULL)) == NULL) {
ELOG("Could not grab pointer\n");
return;
}
free(reply);
/* Go into our own event loop */
xcb_flush(conn);
xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
bool loop_done = false;
/* Ive always wanted to have my own eventhandler… */
while (!loop_done && (inside_event = xcb_wait_for_event(conn))) {
/* We now handle all events we can get using xcb_poll_for_event */
do {
/* skip x11 errors */
if (inside_event->response_type == 0) {
free(inside_event);
continue;
}
/* Strip off the highest bit (set if the event is generated) */
int type = (inside_event->response_type & 0x7F);
switch (type) {
case XCB_BUTTON_RELEASE:
loop_done = true;
break;
case XCB_MOTION_NOTIFY:
/* motion_notify events are saved for later */
FREE(last_motion_notify);
last_motion_notify = inside_event;
break;
case XCB_UNMAP_NOTIFY:
case XCB_KEY_PRESS:
case XCB_KEY_RELEASE:
DLOG("Unmap-notify, aborting\n");
handle_event(type, inside_event);
loop_done = true;
break;
default:
DLOG("Passing to original handler\n");
/* Use original handler */
handle_event(type, inside_event);
break;
}
if (last_motion_notify != inside_event)
free(inside_event);
} while ((inside_event = xcb_poll_for_event(conn)) != NULL);
if (last_motion_notify == NULL)
continue;
new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
callback(con, &old_rect, new_x, new_y, extra);
FREE(last_motion_notify);
}
xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
xcb_flush(conn);
}
#if 0
/*
* Moves the client 10px to the specified direction.
*
*/
void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
DLOG("floating move\n");
Rect destination = currently_focused->rect;
Rect *screen = &(currently_focused->workspace->output->rect);
switch (direction) {
case D_LEFT:
destination.x -= 10;
break;
case D_RIGHT:
destination.x += 10;
break;
case D_UP:
destination.y -= 10;
break;
case D_DOWN:
destination.y += 10;
break;
/* to make static analyzers happy */
default:
break;
}
/* Prevent windows from vanishing completely */
if ((int32_t)(destination.x + destination.width - 5) <= (int32_t)screen->x ||
(int32_t)(destination.x + 5) >= (int32_t)(screen->x + screen->width) ||
(int32_t)(destination.y + destination.height - 5) <= (int32_t)screen->y ||
(int32_t)(destination.y + 5) >= (int32_t)(screen->y + screen->height)) {
DLOG("boundary check failed, not moving\n");
return;
}
currently_focused->rect = destination;
reposition_client(conn, currently_focused);
/* Because reposition_client does not send a faked configure event (only resize does),
* we need to initiate that on our own */
fake_absolute_configure_notify(conn, currently_focused);
/* fake_absolute_configure_notify flushes */
}
/*
* Hides all floating clients (or show them if they are currently hidden) on
* the specified workspace.
*
*/
void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
Client *client;
workspace->floating_hidden = !workspace->floating_hidden;
DLOG("floating_hidden is now: %d\n", workspace->floating_hidden);
TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
if (workspace->floating_hidden)
client_unmap(conn, client);
else client_map(conn, client);
}
/* If we just unmapped all floating windows we should ensure that the focus
* is set correctly, that ist, to the first non-floating client in stack */
if (workspace->floating_hidden)
SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
if (client_is_floating(client))
continue;
set_focus(conn, client, true);
return;
}
xcb_flush(conn);
}
#endif