gri3-wm/src/layout.c

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/*
* vim:ts=8:expandtab
*
* i3 - an improved dynamic tiling window manager
*
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* © 2009 Michael Stapelberg and contributors
*
* See file LICENSE for license information.
*
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* layout.c: Functions handling layout/drawing of window decorations
*
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <xcb/xcb.h>
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#include <assert.h>
#include <math.h>
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#include "config.h"
#include "i3.h"
#include "xcb.h"
#include "table.h"
#include "util.h"
#include "xinerama.h"
#include "layout.h"
#include "client.h"
#include "floating.h"
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/*
* Updates *destination with new_value and returns true if it was changed or false
* if it was the same
*
*/
static bool update_if_necessary(uint32_t *destination, const uint32_t new_value) {
uint32_t old_value = *destination;
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return ((*destination = new_value) != old_value);
}
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/*
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* Gets the unoccupied space (= space which is available for windows which were resized by the user)
* for the given row. This is necessary to render both, customly resized windows and never touched
* windows correctly, meaning that the aspect ratio will be maintained when opening new windows.
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*
*/
int get_unoccupied_x(Workspace *workspace) {
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int unoccupied = workspace->rect.width;
float default_factor = ((float)workspace->rect.width / workspace->cols) / workspace->rect.width;
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LOG("get_unoccupied_x(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
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for (int cols = 0; cols < workspace->cols; cols++) {
LOG("width_factor[%d] = %f\n", cols, workspace->width_factor[cols]);
if (workspace->width_factor[cols] == 0)
unoccupied -= workspace->rect.width * default_factor;
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}
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LOG("unoccupied space: %d\n", unoccupied);
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return unoccupied;
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}
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/* See get_unoccupied_x() */
int get_unoccupied_y(Workspace *workspace, int col) {
int unoccupied = workspace->rect.height;
float default_factor = ((float)workspace->rect.height / workspace->rows) / workspace->rect.height;
LOG("get_unoccupied_y(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
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for (int rows = 0; rows < workspace->rows; rows++) {
LOG("height_factor[%d] = %f\n", rows, workspace->height_factor[rows]);
if (workspace->height_factor[rows] == 0)
unoccupied -= workspace->rect.height * default_factor;
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}
LOG("unoccupied space: %d\n", unoccupied);
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return unoccupied;
}
/*
* Redecorates the given client correctly by checking if its in a stacking container and
* re-rendering the stack window or just calling decorate_window if its not in a stacking
* container.
*
*/
void redecorate_window(xcb_connection_t *conn, Client *client) {
if (client->container != NULL && client->container->mode == MODE_STACK) {
render_container(conn, client->container);
/* We clear the frame to generate exposure events, because the color used
in drawing may be different */
xcb_clear_area(conn, true, client->frame, 0, 0, client->rect.width, client->rect.height);
} else decorate_window(conn, client, client->frame, client->titlegc, 0);
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xcb_flush(conn);
}
/*
* (Re-)draws window decorations for a given Client onto the given drawable/graphic context.
* When in stacking mode, the window decorations are drawn onto an own window.
*
*/
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void decorate_window(xcb_connection_t *conn, Client *client, xcb_drawable_t drawable, xcb_gcontext_t gc, int offset) {
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i3Font *font = load_font(conn, config.font);
int decoration_height = font->height + 2 + 2;
struct Colortriple *color;
/* Clients without a container (docks) wont get decorated */
if (client->dock)
return;
LOG("redecorating child %08x\n", client->child);
if (client_is_floating(client) || client->container->currently_focused == client) {
/* Distinguish if the window is currently focused… */
if (client_is_floating(client) || CUR_CELL->currently_focused == client)
color = &(config.client.focused);
/* …or if it is the focused window in a not focused container */
else color = &(config.client.focused_inactive);
} else color = &(config.client.unfocused);
/* Our plan is the following:
- Draw a rect around the whole client in color->background
- Draw two lines in a lighter color
- Draw the windows title
*/
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/* Draw a rectangle in background color around the window */
xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, color->background);
/* In stacking mode, we only render the rect for this specific decoration */
if (client->container != NULL && client->container->mode == MODE_STACK) {
/* We need to use the containers width because it is the more recent value - when
in stacking mode, clients get reconfigured only on demand (the not active client
is not reconfigured), so the clients rect.width would be wrong */
xcb_rectangle_t rect = {0, offset, client->container->width, offset + decoration_height };
xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
} else {
xcb_rectangle_t rect = {0, 0, client->rect.width, client->rect.height};
xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
/* Draw the inner background to have a black frame around clients (such as mplayer)
which cannot be resized exactly in our frames and therefore are centered */
xcb_change_gc_single(conn, client->titlegc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
xcb_rectangle_t crect = {2, decoration_height,
client->rect.width - (2 + 2), client->rect.height - 2 - decoration_height};
xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
}
/* Draw the lines */
xcb_draw_line(conn, drawable, gc, color->border, 0, offset, client->rect.width, offset);
xcb_draw_line(conn, drawable, gc, color->border, 2, offset + font->height + 3,
client->rect.width - 3, offset + font->height + 3);
/* If the client has a title, we draw it */
if (client->name != NULL) {
/* Draw the 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, gc, mask, values);
/* name_len == -1 means this is a legacy application which does not specify _NET_WM_NAME,
and we dont handle the old window name (COMPOUND_TEXT) but only _NET_WM_NAME, which
is UTF-8 */
if (client->name_len == -1)
xcb_image_text_8(conn, strlen(client->name), drawable, gc, 3 /* X */,
offset + font->height /* Y = baseline of font */, client->name);
else
xcb_image_text_16(conn, client->name_len, drawable, gc, 3 /* X */,
offset + font->height /* Y = baseline of font */, (xcb_char2b_t*)client->name);
}
}
/*
* Pushes the clients x and y coordinates to X11
*
*/
void reposition_client(xcb_connection_t *conn, Client *client) {
i3Screen *screen;
LOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
/* Note: We can use a pointer to client->x like an array of uint32_ts
because it is followed by client->y by definition */
xcb_configure_window(conn, client->frame, XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->rect.x));
if (!client_is_floating(client))
return;
/* If the client is floating, we need to check if we moved it to a different workspace */
if (client->workspace->screen == (screen = get_screen_containing(client->rect.x, client->rect.y)))
return;
if (screen == NULL) {
LOG("Boundary checking disabled, no screen found for (%d, %d)\n", client->rect.x, client->rect.y);
return;
}
LOG("Client is on workspace %p with screen %p\n", client->workspace, client->workspace->screen);
LOG("but screen at %d, %d is %p\n", client->rect.x, client->rect.y, screen);
floating_assign_to_workspace(client, &workspaces[screen->current_workspace]);
LOG("fixed that\n");
}
/*
* Pushes the clients width/height to X11 and resizes the child window
*
*/
void resize_client(xcb_connection_t *conn, Client *client) {
i3Font *font = load_font(conn, config.font);
LOG("resizing client 0x%08x to %d x %d\n", client->frame, client->rect.width, client->rect.height);
xcb_configure_window(conn, client->frame,
XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
&(client->rect.width));
/* Adjust the position of the child inside its frame.
* The coordinates of the child are relative to its frame, we
* add a border of 2 pixel to each value */
uint32_t mask = XCB_CONFIG_WINDOW_X |
XCB_CONFIG_WINDOW_Y |
XCB_CONFIG_WINDOW_WIDTH |
XCB_CONFIG_WINDOW_HEIGHT;
Rect *rect = &(client->child_rect);
switch ((client->container != NULL ? client->container->mode : MODE_DEFAULT)) {
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case MODE_STACK:
rect->x = 2;
rect->y = 0;
rect->width = client->rect.width - (2 + 2);
rect->height = client->rect.height - 2;
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break;
default:
if (client->titlebar_position == TITLEBAR_OFF) {
rect->x = 0;
rect->y = 0;
rect->width = client->rect.width;
rect->height = client->rect.height;
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} else {
rect->x = 2;
rect->y = font->height + 2 + 2;
rect->width = client->rect.width - (2 + 2);
rect->height = client->rect.height - ((font->height + 2 + 2) + 2);
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}
break;
}
/* Obey the ratio, if any */
if (client->proportional_height != 0 &&
client->proportional_width != 0) {
LOG("proportional height = %d, width = %d\n", client->proportional_height, client->proportional_width);
double new_height = rect->height + 1;
int new_width = rect->width;
while (new_height > rect->height) {
new_height = ((double)client->proportional_height / client->proportional_width) * new_width;
if (new_height > rect->height)
new_width--;
}
/* Center the window */
rect->y += ceil(rect->height / 2) - floor(new_height / 2);
rect->x += ceil(rect->width / 2) - floor(new_width / 2);
rect->height = new_height;
rect->width = new_width;
LOG("new_height = %f, new_width = %d\n", new_height, new_width);
}
LOG("child will be at %dx%d with size %dx%d\n", rect->x, rect->y, rect->width, rect->height);
xcb_configure_window(conn, client->child, mask, &(rect->x));
/* After configuring a child window we need to fake a configure_notify_event (see ICCCM 4.2.3).
* This is necessary to inform the client of its position relative to the root window,
* not relative to its frame (as done in the configure_notify_event by the x server). */
fake_absolute_configure_notify(conn, client);
}
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/*
* Renders the given container. Is called by render_layout() or individually (for example
* when focus changes in a stacking container)
*
*/
void render_container(xcb_connection_t *conn, Container *container) {
Client *client;
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int num_clients = 0, current_client = 0;
CIRCLEQ_FOREACH(client, &(container->clients), clients)
num_clients++;
if (container->mode == MODE_DEFAULT) {
LOG("got %d clients in this default container.\n", num_clients);
CIRCLEQ_FOREACH(client, &(container->clients), clients) {
/* If the client is in fullscreen mode, it does not get reconfigured */
if (container->workspace->fullscreen_client == client) {
current_client++;
continue;
}
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/* Check if we changed client->x or client->y by updating it.
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* Note the bitwise OR instead of logical OR to force evaluation of both statements */
if (client->force_reconfigure |
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update_if_necessary(&(client->rect.x), container->x) |
update_if_necessary(&(client->rect.y), container->y +
(container->height / num_clients) * current_client))
reposition_client(conn, client);
/* TODO: vertical default layout */
if (client->force_reconfigure |
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update_if_necessary(&(client->rect.width), container->width) |
update_if_necessary(&(client->rect.height), container->height / num_clients))
resize_client(conn, client);
client->force_reconfigure = false;
current_client++;
}
} else {
i3Font *font = load_font(conn, config.font);
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int decoration_height = (font->height + 2 + 2);
struct Stack_Window *stack_win = &(container->stack_win);
/* Check if we need to remap our stack title window, it gets unmapped when the container
is empty in src/handlers.c:unmap_notify() */
if (stack_win->rect.height == 0)
xcb_map_window(conn, stack_win->window);
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/* Check if we need to reconfigure our stack title window */
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if (update_if_necessary(&(stack_win->rect.x), container->x) |
update_if_necessary(&(stack_win->rect.y), container->y) |
update_if_necessary(&(stack_win->rect.width), container->width) |
update_if_necessary(&(stack_win->rect.height), decoration_height * num_clients)) {
/* Configuration can happen in two slightly different ways:
If there is no client in fullscreen mode, 5 parameters are passed
(x, y, width, height, stack mode is set to above which means top-most position).
If there is a fullscreen client, the fourth parameter is set to to the
fullscreen window as sibling and the stack mode is set to below, which means
that the stack_window will be placed just below the sibling, that is, under
the fullscreen window.
*/
uint32_t values[] = { stack_win->rect.x, stack_win->rect.y,
stack_win->rect.width, stack_win->rect.height,
XCB_STACK_MODE_ABOVE, XCB_STACK_MODE_BELOW };
uint32_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT |
XCB_CONFIG_WINDOW_STACK_MODE;
/* Raise the stack window, but keep it below the first floating client
* and below the fullscreen client (if any) */
Client *first_floating = TAILQ_FIRST(&(container->workspace->floating_clients));
if (first_floating != TAILQ_END(&(container->workspace->floating_clients))) {
mask |= XCB_CONFIG_WINDOW_SIBLING;
values[4] = first_floating->frame;
} else if (container->workspace->fullscreen_client != NULL) {
mask |= XCB_CONFIG_WINDOW_SIBLING;
values[4] = container->workspace->fullscreen_client->frame;
}
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xcb_configure_window(conn, stack_win->window, mask, values);
}
/* Prepare the pixmap for usage */
cached_pixmap_prepare(conn, &(stack_win->pixmap));
/* Render the decorations of all clients */
CIRCLEQ_FOREACH(client, &(container->clients), clients) {
/* If the client is in fullscreen mode, it does not get reconfigured */
if (container->workspace->fullscreen_client == client) {
current_client++;
continue;
}
/* Check if we changed client->x or client->y by updating it.
* Note the bitwise OR instead of logical OR to force evaluation of both statements */
if (client->force_reconfigure |
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update_if_necessary(&(client->rect.x), container->x) |
update_if_necessary(&(client->rect.y), container->y + (decoration_height * num_clients)))
reposition_client(conn, client);
if (client->force_reconfigure |
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update_if_necessary(&(client->rect.width), container->width) |
update_if_necessary(&(client->rect.height), container->height - (decoration_height * num_clients)))
resize_client(conn, client);
client->force_reconfigure = false;
decorate_window(conn, client, stack_win->pixmap.id, stack_win->pixmap.gc,
current_client++ * decoration_height);
}
xcb_copy_area(conn, stack_win->pixmap.id, stack_win->window, stack_win->pixmap.gc,
0, 0, 0, 0, stack_win->rect.width, stack_win->rect.height);
}
}
static void render_bars(xcb_connection_t *conn, Workspace *r_ws, int width, int *height) {
Client *client;
SLIST_FOREACH(client, &(r_ws->screen->dock_clients), dock_clients) {
LOG("client is at %d, should be at %d\n", client->rect.y, *height);
if (client->force_reconfigure |
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update_if_necessary(&(client->rect.x), 0) |
update_if_necessary(&(client->rect.y), *height))
reposition_client(conn, client);
if (client->force_reconfigure |
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update_if_necessary(&(client->rect.width), width) |
update_if_necessary(&(client->rect.height), client->desired_height))
resize_client(conn, client);
client->force_reconfigure = false;
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LOG("desired_height = %d\n", client->desired_height);
*height += client->desired_height;
}
}
static void render_internal_bar(xcb_connection_t *conn, Workspace *r_ws, int width, int height) {
LOG("Rendering internal bar\n");
i3Font *font = load_font(conn, config.font);
i3Screen *screen = r_ws->screen;
enum { SET_NORMAL = 0, SET_FOCUSED = 1 };
char label[3];
/* Fill the whole bar in black */
xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
xcb_rectangle_t rect = {0, 0, width, height};
xcb_poly_fill_rectangle(conn, screen->bar, screen->bargc, 1, &rect);
/* Set font */
xcb_change_gc_single(conn, screen->bargc, XCB_GC_FONT, font->id);
int drawn = 0;
for (int c = 0; c < 10; c++) {
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if (workspaces[c].screen != screen)
continue;
struct Colortriple *color = (screen->current_workspace == c ? &(config.bar.focused) :
&(config.bar.unfocused));
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xcb_draw_rect(conn, screen->bar, screen->bargc, color->border,
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drawn * height, 1, height - 2, height - 2);
xcb_draw_rect(conn, screen->bar, screen->bargc, color->background,
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drawn * height + 1, 2, height - 4, height - 4);
snprintf(label, sizeof(label), "%d", c+1);
xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, color->text);
xcb_change_gc_single(conn, screen->bargc, XCB_GC_BACKGROUND, color->background);
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xcb_image_text_8(conn, strlen(label), screen->bar, screen->bargc, drawn * height + 5 /* X */,
font->height + 1 /* Y = baseline of font */, label);
drawn++;
}
LOG("done rendering internal\n");
}
/*
* Modifies the event mask of all clients on the given workspace to either ignore or to handle
* enter notifies. It is handy to ignore notifies because they will be sent when a window is mapped
* under the cursor, thus when the user didnt enter the window actively at all.
*
*/
void ignore_enter_notify_forall(xcb_connection_t *conn, Workspace *workspace, bool ignore_enter_notify) {
Client *client;
uint32_t values[1];
LOG("Ignore enter_notify = %d\n", ignore_enter_notify);
FOR_TABLE(workspace)
CIRCLEQ_FOREACH(client, &(workspace->table[cols][rows]->clients), clients) {
/* Change event mask for the decorations */
values[0] = FRAME_EVENT_MASK;
if (ignore_enter_notify)
values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
xcb_change_window_attributes(conn, client->frame, XCB_CW_EVENT_MASK, values);
/* Change event mask for the child itself */
values[0] = CHILD_EVENT_MASK;
if (ignore_enter_notify)
values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
xcb_change_window_attributes(conn, client->child, XCB_CW_EVENT_MASK, values);
}
}
/*
* Renders the given workspace on the given screen
*
*/
void render_workspace(xcb_connection_t *conn, i3Screen *screen, Workspace *r_ws) {
i3Font *font = load_font(conn, config.font);
int width = r_ws->rect.width;
int height = r_ws->rect.height;
/* Reserve space for dock clients */
Client *client;
SLIST_FOREACH(client, &(screen->dock_clients), dock_clients)
height -= client->desired_height;
/* Space for the internal bar */
height -= (font->height + 6);
LOG("got %d rows and %d cols\n", r_ws->rows, r_ws->cols);
int xoffset[r_ws->rows];
int yoffset[r_ws->cols];
/* Initialize offsets */
for (int cols = 0; cols < r_ws->cols; cols++)
yoffset[cols] = r_ws->rect.y;
for (int rows = 0; rows < r_ws->rows; rows++)
xoffset[rows] = r_ws->rect.x;
dump_table(conn, r_ws);
ignore_enter_notify_forall(conn, r_ws, true);
/* Go through the whole table and render whats necessary */
FOR_TABLE(r_ws) {
Container *container = r_ws->table[cols][rows];
int single_width = -1, single_height;
LOG("\n");
LOG("========\n");
LOG("container has %d colspan, %d rowspan\n",
container->colspan, container->rowspan);
LOG("container at %d, %d\n", xoffset[rows], yoffset[cols]);
/* Update position of the container */
container->row = rows;
container->col = cols;
container->x = xoffset[rows];
container->y = yoffset[cols];
container->width = 0;
for (int c = 0; c < container->colspan; c++) {
if (r_ws->width_factor[cols+c] == 0)
container->width += (width / r_ws->cols);
else container->width += get_unoccupied_x(r_ws) * r_ws->width_factor[cols+c];
if (single_width == -1)
single_width = container->width;
}
//if (container->height_factor == 0)
container->height = (height / r_ws->rows);
//else container->height = get_unoccupied_y(r_ws, cols) * container->height_factor;
single_height = container->height;
container->height *= container->rowspan;
/* Render the container if it is not empty */
render_container(conn, container);
xoffset[rows] += single_width;
yoffset[cols] += single_height;
LOG("==========\n");
}
ignore_enter_notify_forall(conn, r_ws, false);
render_bars(conn, r_ws, width, &height);
render_internal_bar(conn, r_ws, width, font->height + 6);
}
/*
* Renders the whole layout, that is: Go through each screen, each workspace, each container
* and render each client. This also renders the bars.
*
* If you dont need to render *everything*, you should call render_container on the container
* you want to refresh.
*
*/
void render_layout(xcb_connection_t *conn) {
i3Screen *screen;
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TAILQ_FOREACH(screen, virtual_screens, screens) {
LOG("Rendering screen %d\n", screen->num);
render_workspace(conn, screen, &(workspaces[screen->current_workspace]));
}
xcb_flush(conn);
}