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i3/src/resize.c
Michael Stapelberg 818e02ef35 huge change: implement RandR instead of Xinerama 
Thanks to Merovius for doing a proof of concept on this one and
being a driving force behind the idea.

Using RandR instead of Xinerama means that we are now able to use
the full potential of the modern way of configuring screens. That
means, i3 now has an idea of the outputs your graphic driver
provides, which allowed us to get rid of the ugly way of detecting
changes in the screen configuration which we used before. Now, your
workspaces should not be confused when changing output modes anymore.

Also, instead of having ugly heuristics to assign your workspaces
to (the screen at position X or the second screen in the list of
screens) you will be able to just specify an output name.

As this change basically touches everything, you should be prepared
for bugs. Please test and report them!
2010-03-02 12:47:21 +01:00

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/*
* vim:ts=8:expandtab
*
* i3 - an improved dynamic tiling window manager
*
* © 2009 Michael Stapelberg and contributors
*
* See file LICENSE for license information.
*
* This file contains the functions for resizing table columns/rows because
* it’s actually lots of work, compared to the other handlers.
*
*/
#include <stdlib.h>
#include <assert.h>
#include <xcb/xcb.h>
#include <xcb/xcb_event.h>
#include "i3.h"
#include "data.h"
#include "resize.h"
#include "util.h"
#include "xcb.h"
#include "debug.h"
#include "layout.h"
#include "randr.h"
#include "config.h"
#include "floating.h"
#include "workspace.h"
#include "log.h"
/*
* Renders the resize window between the first/second container and resizes
* the table column/row.
*
*/
int resize_graphical_handler(xcb_connection_t *conn, Workspace *ws, int first, int second,
resize_orientation_t orientation, xcb_button_press_event_t *event) {
int new_position;
struct xoutput *screen = get_screen_containing(event->root_x, event->root_y);
if (screen == NULL) {
ELOG("BUG: No screen found at this position (%d, %d)\n", event->root_x, event->root_y);
return 1;
}
/* We cannot use the X root window's width_in_pixels or height_in_pixels
* attributes here since they are not updated when you configure new
* screens during runtime. Instead, we just use the most right and most
* bottom Xinerama screen and use their position + width/height to get
* the area of pixels currently in use */
struct xoutput *most_right = get_screen_most(D_RIGHT, screen),
*most_bottom = get_screen_most(D_DOWN, screen);
DLOG("event->event_x = %d, event->root_x = %d\n", event->event_x, event->root_x);
DLOG("Screen dimensions: (%d, %d) %d x %d\n", screen->rect.x, screen->rect.y, screen->rect.width, screen->rect.height);
uint32_t mask = 0;
uint32_t values[2];
mask = XCB_CW_OVERRIDE_REDIRECT;
values[0] = 1;
/* Open a new window, the resizebar. Grab the pointer and move the window around
as the user moves the pointer. */
Rect grabrect = {0,
0,
most_right->rect.x + most_right->rect.width,
most_bottom->rect.x + most_bottom->rect.height};
xcb_window_t grabwin = create_window(conn, grabrect, XCB_WINDOW_CLASS_INPUT_ONLY, -1, true, mask, values);
Rect helprect;
if (orientation == O_VERTICAL) {
helprect.x = event->root_x;
helprect.y = screen->rect.y;
helprect.width = 2;
helprect.height = screen->rect.height;
new_position = event->root_x;
} else {
helprect.x = screen->rect.x;
helprect.y = event->root_y;
helprect.width = screen->rect.width;
helprect.height = 2;
new_position = event->root_y;
}
mask = XCB_CW_BACK_PIXEL;
values[0] = config.client.focused.border;
mask |= XCB_CW_OVERRIDE_REDIRECT;
values[1] = 1;
xcb_window_t helpwin = create_window(conn, helprect, XCB_WINDOW_CLASS_INPUT_OUTPUT,
(orientation == O_VERTICAL ?
XCB_CURSOR_SB_H_DOUBLE_ARROW :
XCB_CURSOR_SB_V_DOUBLE_ARROW), true, mask, values);
xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
xcb_flush(conn);
void resize_callback(Rect *old_rect, uint32_t new_x, uint32_t new_y) {
DLOG("new x = %d, y = %d\n", new_x, new_y);
if (orientation == O_VERTICAL) {
/* Check if the new coordinates are within screen boundaries */
if (new_x > (screen->rect.x + screen->rect.width - 25) ||
new_x < (screen->rect.x + 25))
return;
values[0] = new_position = new_x;
xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_X, values);
} else {
if (new_y > (screen->rect.y + screen->rect.height - 25) ||
new_y < (screen->rect.y + 25))
return;
values[0] = new_position = new_y;
xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_Y, values);
}
xcb_flush(conn);
}
drag_pointer(conn, NULL, event, grabwin, BORDER_TOP, resize_callback);
xcb_destroy_window(conn, helpwin);
xcb_destroy_window(conn, grabwin);
xcb_flush(conn);
int pixels;
if (orientation == O_VERTICAL)
pixels = (new_position - event->root_x);
else pixels = (new_position - event->root_y);
resize_container(conn, ws, first, second, orientation, pixels);
return 1;
}
/*
* Resizes a column/row by the given amount of pixels. Called by
* resize_graphical_handler (the user clicked) or parse_resize_command (the
* user issued the command)
*
*/
void resize_container(xcb_connection_t *conn, Workspace *ws, int first, int second,
resize_orientation_t orientation, int pixels) {
/* TODO: refactor this, both blocks are very identical */
if (orientation == O_VERTICAL) {
int default_width = ws->rect.width / ws->cols;
int old_unoccupied_x = get_unoccupied_x(ws);
/* We pre-calculate the unoccupied space to see if we need to adapt sizes before
* doing the resize */
int new_unoccupied_x = old_unoccupied_x;
if (old_unoccupied_x == 0)
old_unoccupied_x = ws->rect.width;
if (ws->width_factor[first] == 0)
new_unoccupied_x += default_width;
if (ws->width_factor[second] == 0)
new_unoccupied_x += default_width;
DLOG("\n\n\n");
DLOG("old = %d, new = %d\n", old_unoccupied_x, new_unoccupied_x);
int cols_without_wf = 0;
int old_width, old_second_width;
for (int col = 0; col < ws->cols; col++)
if (ws->width_factor[col] == 0)
cols_without_wf++;
DLOG("old_unoccupied_x = %d\n", old_unoccupied_x);
DLOG("Updating first (before = %f)\n", ws->width_factor[first]);
/* Convert 0 (for default width_factor) to actual numbers */
if (ws->width_factor[first] == 0)
old_width = (old_unoccupied_x / max(cols_without_wf, 1));
else old_width = ws->width_factor[first] * old_unoccupied_x;
DLOG("second (before = %f)\n", ws->width_factor[second]);
if (ws->width_factor[second] == 0)
old_second_width = (old_unoccupied_x / max(cols_without_wf, 1));
else old_second_width = ws->width_factor[second] * old_unoccupied_x;
DLOG("middle = %f\n", ws->width_factor[first]);
/* If the space used for customly resized columns has changed we need to adapt the
* other customly resized columns, if any */
if (new_unoccupied_x != old_unoccupied_x)
for (int col = 0; col < ws->cols; col++) {
if (ws->width_factor[col] == 0)
continue;
DLOG("Updating other column (%d) (current width_factor = %f)\n", col, ws->width_factor[col]);
ws->width_factor[col] = (ws->width_factor[col] * old_unoccupied_x) / new_unoccupied_x;
DLOG("to %f\n", ws->width_factor[col]);
}
DLOG("Updating first (before = %f)\n", ws->width_factor[first]);
/* Convert 0 (for default width_factor) to actual numbers */
if (ws->width_factor[first] == 0)
ws->width_factor[first] = ((float)ws->rect.width / ws->cols) / new_unoccupied_x;
DLOG("first->width = %d, pixels = %d\n", old_width, pixels);
ws->width_factor[first] *= (float)(old_width + pixels) / old_width;
DLOG("-> %f\n", ws->width_factor[first]);
DLOG("Updating second (before = %f)\n", ws->width_factor[second]);
if (ws->width_factor[second] == 0)
ws->width_factor[second] = ((float)ws->rect.width / ws->cols) / new_unoccupied_x;
DLOG("middle = %f\n", ws->width_factor[second]);
DLOG("second->width = %d, pixels = %d\n", old_second_width, pixels);
ws->width_factor[second] *= (float)(old_second_width - pixels) / old_second_width;
DLOG("-> %f\n", ws->width_factor[second]);
DLOG("new unoccupied_x = %d\n", get_unoccupied_x(ws));
DLOG("\n\n\n");
} else {
int ws_height = workspace_height(ws);
int default_height = ws_height / ws->rows;
int old_unoccupied_y = get_unoccupied_y(ws);
/* We pre-calculate the unoccupied space to see if we need to adapt sizes before
* doing the resize */
int new_unoccupied_y = old_unoccupied_y;
if (old_unoccupied_y == 0)
old_unoccupied_y = ws_height;
if (ws->height_factor[first] == 0)
new_unoccupied_y += default_height;
if (ws->height_factor[second] == 0)
new_unoccupied_y += default_height;
int cols_without_hf = 0;
int old_height, old_second_height;
for (int row = 0; row < ws->rows; row++)
if (ws->height_factor[row] == 0)
cols_without_hf++;
DLOG("old_unoccupied_y = %d\n", old_unoccupied_y);
DLOG("Updating first (before = %f)\n", ws->height_factor[first]);
/* Convert 0 (for default width_factor) to actual numbers */
if (ws->height_factor[first] == 0)
old_height = (old_unoccupied_y / max(cols_without_hf, 1));
else old_height = ws->height_factor[first] * old_unoccupied_y;
DLOG("second (before = %f)\n", ws->height_factor[second]);
if (ws->height_factor[second] == 0)
old_second_height = (old_unoccupied_y / max(cols_without_hf, 1));
else old_second_height = ws->height_factor[second] * old_unoccupied_y;
DLOG("middle = %f\n", ws->height_factor[first]);
DLOG("\n\n\n");
DLOG("old = %d, new = %d\n", old_unoccupied_y, new_unoccupied_y);
/* If the space used for customly resized columns has changed we need to adapt the
* other customly resized columns, if any */
if (new_unoccupied_y != old_unoccupied_y)
for (int row = 0; row < ws->rows; row++) {
if (ws->height_factor[row] == 0)
continue;
DLOG("Updating other column (%d) (current width_factor = %f)\n", row, ws->height_factor[row]);
ws->height_factor[row] = (ws->height_factor[row] * old_unoccupied_y) / new_unoccupied_y;
DLOG("to %f\n", ws->height_factor[row]);
}
DLOG("Updating first (before = %f)\n", ws->height_factor[first]);
/* Convert 0 (for default width_factor) to actual numbers */
if (ws->height_factor[first] == 0)
ws->height_factor[first] = ((float)ws_height / ws->rows) / new_unoccupied_y;
DLOG("first->width = %d, pixels = %d\n", old_height, pixels);
ws->height_factor[first] *= (float)(old_height + pixels) / old_height;
DLOG("-> %f\n", ws->height_factor[first]);
DLOG("Updating second (before = %f)\n", ws->height_factor[second]);
if (ws->height_factor[second] == 0)
ws->height_factor[second] = ((float)ws_height / ws->rows) / new_unoccupied_y;
DLOG("middle = %f\n", ws->height_factor[second]);
DLOG("second->width = %d, pixels = %d\n", old_second_height, pixels);
ws->height_factor[second] *= (float)(old_second_height - pixels) / old_second_height;
DLOG("-> %f\n", ws->height_factor[second]);
DLOG("new unoccupied_y = %d\n", get_unoccupied_y(ws));
DLOG("\n\n\n");
}
render_layout(conn);
}
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