519 lines
19 KiB
C
519 lines
19 KiB
C
/*
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* vim:ts=8:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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*
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* © 2009-2010 Michael Stapelberg and contributors
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*
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* See file LICENSE for license information.
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*
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* For more information on RandR, please see the X.org RandR specification at
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* http://cgit.freedesktop.org/xorg/proto/randrproto/tree/randrproto.txt
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* (take your time to read it completely, it answers all questions).
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdbool.h>
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#include <assert.h>
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#include <time.h>
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#include <unistd.h>
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#include <xcb/xcb.h>
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#include <xcb/randr.h>
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#include "queue.h"
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#include "i3.h"
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#include "data.h"
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#include "table.h"
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#include "util.h"
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#include "layout.h"
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#include "xcb.h"
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#include "config.h"
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#include "workspace.h"
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#include "log.h"
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#include "ewmh.h"
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/* While a clean namespace is usually a pretty good thing, we really need
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* to use shorter names than the whole xcb_randr_* default names. */
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typedef xcb_randr_get_crtc_info_reply_t crtc_info;
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typedef xcb_randr_mode_info_t mode_info;
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typedef xcb_randr_get_screen_resources_current_reply_t resources_reply;
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/* Stores all outputs available in your current session. */
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struct outputs_head outputs = TAILQ_HEAD_INITIALIZER(outputs);
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static bool randr_disabled = false;
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/*
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* Get a specific output by its internal X11 id. Used by randr_query_outputs
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* to check if the output is new (only in the first scan) or if we are
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* re-scanning.
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*
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*/
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static Output *get_output_by_id(xcb_randr_output_t id) {
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Output *output;
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TAILQ_FOREACH(output, &outputs, outputs)
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if (output->id == id)
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return output;
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return NULL;
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}
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/*
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* Returns the output with the given name if it is active (!) or NULL.
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*
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*/
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Output *get_output_by_name(const char *name) {
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Output *output;
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TAILQ_FOREACH(output, &outputs, outputs)
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if (output->active &&
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strcasecmp(output->name, name) == 0)
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return output;
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return NULL;
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}
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/*
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* Returns the first output which is active.
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*
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*/
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Output *get_first_output() {
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Output *output;
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TAILQ_FOREACH(output, &outputs, outputs)
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if (output->active)
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return output;
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return NULL;
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}
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/*
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* Returns the active (!) output which contains the coordinates x, y or NULL
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* if there is no output which contains these coordinates.
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*
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*/
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Output *get_output_containing(int x, int y) {
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Output *output;
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TAILQ_FOREACH(output, &outputs, outputs) {
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if (!output->active)
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continue;
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DLOG("comparing x=%d y=%d with x=%d and y=%d width %d height %d\n",
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x, y, output->rect.x, output->rect.y, output->rect.width, output->rect.height);
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if (x >= output->rect.x && x < (output->rect.x + output->rect.width) &&
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y >= output->rect.y && y < (output->rect.y + output->rect.height))
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return output;
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}
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return NULL;
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}
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/*
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* Gets the output which is the last one in the given direction, for example
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* the output on the most bottom when direction == D_DOWN, the output most
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* right when direction == D_RIGHT and so on.
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*
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* This function always returns a output.
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*
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*/
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Output *get_output_most(direction_t direction, Output *current) {
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Output *output, *candidate = NULL;
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int position = 0;
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TAILQ_FOREACH(output, &outputs, outputs) {
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if (!output->active)
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continue;
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/* Repeated calls of WIN determine the winner of the comparison */
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#define WIN(variable, condition) \
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if (variable condition) { \
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candidate = output; \
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position = variable; \
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} \
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break;
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if (((direction == D_UP) || (direction == D_DOWN)) &&
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(current->rect.x != output->rect.x))
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continue;
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if (((direction == D_LEFT) || (direction == D_RIGHT)) &&
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(current->rect.y != output->rect.y))
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continue;
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switch (direction) {
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case D_UP:
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WIN(output->rect.y, <= position);
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case D_DOWN:
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WIN(output->rect.y, >= position);
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case D_LEFT:
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WIN(output->rect.x, <= position);
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case D_RIGHT:
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WIN(output->rect.x, >= position);
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}
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}
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assert(candidate != NULL);
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return candidate;
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}
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/*
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* Initializes the specified output, assigning the specified workspace to it.
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*
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*/
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void initialize_output(xcb_connection_t *conn, Output *output, Workspace *workspace) {
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i3Font *font = load_font(conn, config.font);
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workspace->output = output;
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output->current_workspace = workspace;
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/* Copy rect for the workspace */
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memcpy(&(workspace->rect), &(output->rect), sizeof(Rect));
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/* Map clients on the workspace, if any */
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workspace_map_clients(conn, workspace);
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/* Create a xoutput for each output */
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Rect bar_rect = {output->rect.x,
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output->rect.y + output->rect.height - (font->height + 6),
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output->rect.x + output->rect.width,
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font->height + 6};
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uint32_t mask = XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
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uint32_t values[] = {1, XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_BUTTON_PRESS};
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output->bar = create_window(conn, bar_rect, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCB_CURSOR_LEFT_PTR, true, mask, values);
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output->bargc = xcb_generate_id(conn);
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xcb_create_gc(conn, output->bargc, output->bar, 0, 0);
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SLIST_INIT(&(output->dock_clients));
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DLOG("initialized output at (%d, %d) with %d x %d\n",
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output->rect.x, output->rect.y, output->rect.width, output->rect.height);
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}
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/*
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* Disables RandR support by creating exactly one output with the size of the
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* X11 screen.
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*
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*/
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void disable_randr(xcb_connection_t *conn) {
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xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
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DLOG("RandR extension unusable, disabling.\n");
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Output *s = scalloc(sizeof(Output));
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s->active = true;
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s->rect.x = 0;
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s->rect.y = 0;
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s->rect.width = root_screen->width_in_pixels;
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s->rect.height = root_screen->height_in_pixels;
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TAILQ_INSERT_TAIL(&outputs, s, outputs);
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randr_disabled = true;
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}
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/*
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* Searches for a mode in the current RandR configuration by the mode id.
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* Returns NULL if no such mode could be found (should never happen).
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*
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*/
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static mode_info *get_mode_by_id(resources_reply *reply, xcb_randr_mode_t mode) {
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xcb_randr_mode_info_iterator_t it;
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for (it = xcb_randr_get_screen_resources_current_modes_iterator(reply);
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it.rem > 0;
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xcb_randr_mode_info_next(&it)) {
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if (it.data->id == mode)
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return it.data;
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}
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return NULL;
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}
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/*
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* This function needs to be called when changing the mode of an output when
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* it already has some workspaces (or a bar window) assigned.
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*
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* It reconfigures the bar window for the new mode, copies the new rect into
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* each workspace on this output and forces all windows on the affected
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* workspaces to be reconfigured.
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*
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* It is necessary to call render_layout() afterwards.
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*
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*/
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static void output_change_mode(xcb_connection_t *conn, Output *output) {
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i3Font *font = load_font(conn, config.font);
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Workspace *ws;
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Client *client;
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DLOG("Output mode changed, reconfiguring bar, updating workspaces\n");
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Rect bar_rect = {output->rect.x,
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output->rect.y + output->rect.height - (font->height + 6),
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output->rect.x + output->rect.width,
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font->height + 6};
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xcb_set_window_rect(conn, output->bar, bar_rect);
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/* go through all workspaces and set force_reconfigure */
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TAILQ_FOREACH(ws, workspaces, workspaces) {
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if (ws->output != output)
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continue;
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/* Update dimensions from output */
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memcpy(&(ws->rect), &(ws->output->rect), sizeof(Rect));
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SLIST_FOREACH(client, &(ws->focus_stack), focus_clients)
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client->force_reconfigure = true;
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/* Update the dimensions of a fullscreen client, if any */
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if (ws->fullscreen_client != NULL) {
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DLOG("Updating fullscreen client size\n");
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client = ws->fullscreen_client;
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Rect r = ws->rect;
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xcb_set_window_rect(conn, client->frame, r);
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r.x = 0;
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r.y = 0;
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xcb_set_window_rect(conn, client->child, r);
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}
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}
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}
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/*
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* Gets called by randr_query_outputs() for each output. The function adds new
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* outputs to the list of outputs, checks if the mode of existing outputs has
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* been changed or if an existing output has been disabled. It will then change
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* either the "changed" or the "to_be_deleted" flag of the output, if
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* appropriate.
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*
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*/
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static void handle_output(xcb_connection_t *conn, xcb_randr_output_t id,
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xcb_randr_get_output_info_reply_t *output,
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xcb_timestamp_t cts, resources_reply *res) {
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/* each CRT controller has a position in which we are interested in */
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crtc_info *crtc;
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/* the CRTC runs in a specific mode, while the position is stored in
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* the output itself */
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mode_info *mode;
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Output *new = get_output_by_id(id);
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bool existing = (new != NULL);
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if (!existing)
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new = scalloc(sizeof(Output));
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new->id = id;
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asprintf(&new->name, "%.*s",
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xcb_randr_get_output_info_name_length(output),
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xcb_randr_get_output_info_name(output));
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DLOG("found output with name %s\n", new->name);
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/* Even if no CRTC is used at the moment, we store the output so that
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* we do not need to change the list ever again (we only update the
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* position/size) */
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if (output->crtc == XCB_NONE) {
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if (!existing)
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TAILQ_INSERT_TAIL(&outputs, new, outputs);
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else if (new->active) {
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new->to_be_disabled = true;
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}
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free(output);
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return;
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}
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xcb_randr_get_crtc_info_cookie_t icookie;
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icookie = xcb_randr_get_crtc_info(conn, output->crtc, cts);
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if ((crtc = xcb_randr_get_crtc_info_reply(conn, icookie, NULL)) == NULL ||
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(mode = get_mode_by_id(res, crtc->mode)) == NULL) {
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DLOG("Skipping output %s: could not get CRTC/mode (%p/%p)\n",
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new->name, crtc, mode);
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free(new);
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free(output);
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return;
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}
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new->active = true;
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bool updated = update_if_necessary(&(new->rect.x), crtc->x) |
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update_if_necessary(&(new->rect.y), crtc->y) |
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update_if_necessary(&(new->rect.width), mode->width) |
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update_if_necessary(&(new->rect.height), mode->height);
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DLOG("mode: %dx%d+%d+%d\n", new->rect.width, new->rect.height,
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new->rect.x, new->rect.y);
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/* If we don’t need to change an existing output or if the output
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* does not exist in the first place, the case is simple: we either
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* need to insert the new output or we are done. */
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if (!updated || !existing) {
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if (!existing)
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TAILQ_INSERT_TAIL(&outputs, new, outputs);
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free(output);
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return;
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}
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new->changed = true;
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}
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/*
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* (Re-)queries the outputs via RandR and stores them in the list of outputs.
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*
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*/
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void randr_query_outputs(xcb_connection_t *conn) {
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Workspace *ws;
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Output *output, *other, *first;
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xcb_randr_get_screen_resources_current_cookie_t rcookie;
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resources_reply *res;
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/* timestamp of the configuration so that we get consistent replies to all
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* requests (if the configuration changes between our different calls) */
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xcb_timestamp_t cts;
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/* an output is VGA-1, LVDS-1, etc. (usually physical video outputs) */
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xcb_randr_output_t *randr_outputs;
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if (randr_disabled)
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return;
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/* Get screen resources (crtcs, outputs, modes) */
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rcookie = xcb_randr_get_screen_resources_current(conn, root);
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if ((res = xcb_randr_get_screen_resources_current_reply(conn, rcookie, NULL)) == NULL) {
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disable_randr(conn);
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return;
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}
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cts = res->config_timestamp;
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int len = xcb_randr_get_screen_resources_current_outputs_length(res);
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randr_outputs = xcb_randr_get_screen_resources_current_outputs(res);
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/* Request information for each output */
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xcb_randr_get_output_info_cookie_t ocookie[len];
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for (int i = 0; i < len; i++)
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ocookie[i] = xcb_randr_get_output_info(conn, randr_outputs[i], cts);
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/* Loop through all outputs available for this X11 screen */
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for (int i = 0; i < len; i++) {
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xcb_randr_get_output_info_reply_t *output;
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if ((output = xcb_randr_get_output_info_reply(conn, ocookie[i], NULL)) == NULL)
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continue;
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handle_output(conn, randr_outputs[i], output, cts, res);
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}
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free(res);
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/* Check for clones, disable the clones and reduce the mode to the
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* lowest common mode */
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TAILQ_FOREACH(output, &outputs, outputs) {
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if (!output->active || output->to_be_disabled)
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continue;
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DLOG("output %p, position (%d, %d), checking for clones\n",
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output, output->rect.x, output->rect.y);
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for (other = output;
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other != TAILQ_END(&outputs);
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other = TAILQ_NEXT(other, outputs)) {
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if (other == output || !other->active || other->to_be_disabled)
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continue;
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if (other->rect.x != output->rect.x ||
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other->rect.y != output->rect.y)
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continue;
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DLOG("output %p has the same position, his mode = %d x %d\n",
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other, other->rect.width, other->rect.height);
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uint32_t width = min(other->rect.width, output->rect.width);
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uint32_t height = min(other->rect.height, output->rect.height);
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if (update_if_necessary(&(output->rect.width), width) |
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update_if_necessary(&(output->rect.height), height))
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output->changed = true;
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update_if_necessary(&(other->rect.width), width);
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update_if_necessary(&(other->rect.height), height);
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DLOG("disabling output %p (%s)\n", other, other->name);
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other->to_be_disabled = true;
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DLOG("new output mode %d x %d, other mode %d x %d\n",
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output->rect.width, output->rect.height,
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other->rect.width, other->rect.height);
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}
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}
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/* Handle outputs which have a new mode or are disabled now (either
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* because the user disabled them or because they are clones) */
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TAILQ_FOREACH(output, &outputs, outputs) {
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if (output->to_be_disabled) {
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output->active = false;
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DLOG("Output %s disabled, re-assigning workspaces/docks\n", output->name);
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if ((first = get_first_output()) == NULL)
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die("No usable outputs available\n");
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bool needs_init = (first->current_workspace == NULL);
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TAILQ_FOREACH(ws, workspaces, workspaces) {
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if (ws->output != output)
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continue;
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workspace_assign_to(ws, first, true);
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if (!needs_init)
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continue;
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initialize_output(conn, first, ws);
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needs_init = false;
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}
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Client *dock;
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while (!SLIST_EMPTY(&(output->dock_clients))) {
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dock = SLIST_FIRST(&(output->dock_clients));
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SLIST_INSERT_HEAD(&(first->dock_clients), dock, dock_clients);
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SLIST_REMOVE_HEAD(&(output->dock_clients), dock_clients);
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}
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output->current_workspace = NULL;
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output->to_be_disabled = false;
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} else if (output->changed) {
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output_change_mode(conn, output);
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output->changed = false;
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}
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}
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ewmh_update_workarea();
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/* Just go through each active output and associate one workspace */
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TAILQ_FOREACH(output, &outputs, outputs) {
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if (!output->active || output->current_workspace != NULL)
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continue;
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ws = get_first_workspace_for_output(output);
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initialize_output(conn, output, ws);
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}
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/* render_layout flushes */
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render_layout(conn);
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}
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/*
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* We have just established a connection to the X server and need the initial
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* XRandR information to setup workspaces for each screen.
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*
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*/
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void initialize_randr(xcb_connection_t *conn, int *event_base) {
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const xcb_query_extension_reply_t *extreply;
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extreply = xcb_get_extension_data(conn, &xcb_randr_id);
|
||
if (!extreply->present)
|
||
disable_randr(conn);
|
||
else randr_query_outputs(conn);
|
||
|
||
if (event_base != NULL)
|
||
*event_base = extreply->first_event;
|
||
|
||
xcb_randr_select_input(conn, root,
|
||
XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE |
|
||
XCB_RANDR_NOTIFY_MASK_OUTPUT_CHANGE |
|
||
XCB_RANDR_NOTIFY_MASK_CRTC_CHANGE |
|
||
XCB_RANDR_NOTIFY_MASK_OUTPUT_PROPERTY);
|
||
|
||
xcb_flush(conn);
|
||
}
|