630 lines
21 KiB
C
630 lines
21 KiB
C
/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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*
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* © 2009-2011 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 <time.h>
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#include <xcb/randr.h>
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#include "all.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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#if 0
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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 bar window on each output */
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if (!config.disable_workspace_bar) {
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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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}
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SLIST_INIT(&(output->dock_clients));
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ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"init\"}");
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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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DLOG("assigning configured workspaces to this output...\n");
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Workspace *ws;
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TAILQ_FOREACH(ws, workspaces, workspaces) {
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if (ws == workspace)
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continue;
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if (ws->preferred_output == NULL ||
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get_output_by_name(ws->preferred_output) != output)
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continue;
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DLOG("assigning ws %d\n", ws->num + 1);
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workspace_assign_to(ws, output, true);
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}
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}
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#endif
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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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s->name = "xroot-0";
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output_init_con(s);
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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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* Initializes a CT_OUTPUT Con (searches existing ones from inplace restart
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* before) to use for the given Output.
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*
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* XXX: for assignments, we probably need to move workspace creation from here
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* to after the loop in randr_query_outputs().
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*
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*/
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void output_init_con(Output *output) {
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Con *con = NULL, *current;
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bool reused = false;
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DLOG("init_con for output %s\n", output->name);
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/* Search for a Con with that name directly below the root node. There
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* might be one from a restored layout. */
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TAILQ_FOREACH(current, &(croot->nodes_head), nodes) {
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if (strcmp(current->name, output->name) != 0)
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continue;
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con = current;
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reused = true;
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DLOG("Using existing con %p / %s\n", con, con->name);
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break;
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}
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if (con == NULL) {
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con = con_new(croot);
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FREE(con->name);
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con->name = sstrdup(output->name);
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con->type = CT_OUTPUT;
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}
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con->rect = output->rect;
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output->con = con;
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char *name;
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asprintf(&name, "[i3 con] output %s", con->name);
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x_set_name(con, name);
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free(name);
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if (reused) {
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DLOG("Not adding workspace, this was a reused con\n");
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return;
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}
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DLOG("Now adding a workspace\n");
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/* add a workspace to this output */
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Con *ws = con_new(NULL);
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ws->type = CT_WORKSPACE;
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/* get the next unused workspace number */
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DLOG("Getting next unused workspace\n");
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int c = 0;
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bool exists = true;
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while (exists) {
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Con *out, *current;
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c++;
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FREE(ws->name);
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asprintf(&(ws->name), "%d", c);
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exists = false;
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TAILQ_FOREACH(out, &(croot->nodes_head), nodes) {
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TAILQ_FOREACH(current, &(out->nodes_head), nodes) {
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if (strcasecmp(current->name, ws->name) != 0)
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continue;
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exists = true;
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break;
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}
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}
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DLOG("result for ws %s / %d: exists = %d\n", ws->name, c, exists);
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}
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ws->num = c;
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con_attach(ws, con, false);
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asprintf(&name, "[i3 con] workspace %s", ws->name);
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x_set_name(ws, name);
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free(name);
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ws->fullscreen_mode = CF_OUTPUT;
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ws->orientation = HORIZ;
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/* TODO: Set focus in main.c */
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con_focus(ws);
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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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DLOG("Output mode changed, updating rect\n");
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assert(output->con != NULL);
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output->con->rect = output->rect;
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#if 0
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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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SLIST_FOREACH(client, &(ws->focus_stack), focus_clients) {
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client->force_reconfigure = true;
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if (!client_is_floating(client))
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continue;
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/* For floating clients we need to translate the
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* coordinates (old workspace to new workspace) */
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DLOG("old: (%x, %x)\n", client->rect.x, client->rect.y);
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client->rect.x -= ws->rect.x;
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client->rect.y -= ws->rect.y;
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client->rect.x += ws->output->rect.x;
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client->rect.y += ws->output->rect.y;
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DLOG("new: (%x, %x)\n", client->rect.x, client->rect.y);
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}
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/* Update dimensions from output */
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memcpy(&(ws->rect), &(ws->output->rect), sizeof(Rect));
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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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#endif
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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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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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FREE(new->name);
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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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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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DLOG("Skipping output %s: could not get CRTC (%p)\n",
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new->name, crtc);
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free(new);
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return;
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}
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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), crtc->width) |
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update_if_necessary(&(new->rect.height), crtc->height);
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free(crtc);
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new->active = (new->rect.width != 0 && new->rect.height != 0);
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if (!new->active) {
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DLOG("width/height 0/0, disabling output\n");
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return;
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}
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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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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() {
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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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free(output);
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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);
|
||
uint32_t height = min(other->rect.height, output->rect.height);
|
||
|
||
if (update_if_necessary(&(output->rect.width), width) |
|
||
update_if_necessary(&(output->rect.height), height))
|
||
output->changed = true;
|
||
|
||
update_if_necessary(&(other->rect.width), width);
|
||
update_if_necessary(&(other->rect.height), height);
|
||
|
||
DLOG("disabling output %p (%s)\n", other, other->name);
|
||
other->to_be_disabled = true;
|
||
|
||
DLOG("new output mode %d x %d, other mode %d x %d\n",
|
||
output->rect.width, output->rect.height,
|
||
other->rect.width, other->rect.height);
|
||
}
|
||
}
|
||
|
||
/* Handle outputs which have a new mode or are disabled now (either
|
||
* because the user disabled them or because they are clones) */
|
||
TAILQ_FOREACH(output, &outputs, outputs) {
|
||
if (output->to_be_disabled) {
|
||
output->active = false;
|
||
DLOG("Output %s disabled, re-assigning workspaces/docks\n", output->name);
|
||
|
||
if ((first = get_first_output()) == NULL)
|
||
die("No usable outputs available\n");
|
||
|
||
if (output->con != NULL) {
|
||
/* We need to move the workspaces from the disappearing output to the first output */
|
||
/* 1: Get the con to focus next, if the disappearing ws is focused */
|
||
Con *next = NULL;
|
||
if (TAILQ_FIRST(&(croot->focus_head)) == output->con) {
|
||
DLOG("This output (%p) was focused! Getting next\n", output->con);
|
||
next = con_next_focused(output->con);
|
||
DLOG("next = %p\n", next);
|
||
}
|
||
|
||
/* 2: iterate through workspaces and re-assign them */
|
||
Con *current;
|
||
while (!TAILQ_EMPTY(&(output->con->nodes_head))) {
|
||
current = TAILQ_FIRST(&(output->con->nodes_head));
|
||
DLOG("Detaching current = %p / %s\n", current, current->name);
|
||
con_detach(current);
|
||
DLOG("Re-attaching current = %p / %s\n", current, current->name);
|
||
con_attach(current, first->con, false);
|
||
DLOG("Done, next\n");
|
||
}
|
||
DLOG("re-attached all workspaces\n");
|
||
|
||
if (next) {
|
||
DLOG("now focusing next = %p\n", next);
|
||
con_focus(next);
|
||
}
|
||
|
||
DLOG("destroying disappearing con %p\n", output->con);
|
||
tree_close(output->con, false, true);
|
||
DLOG("Done. Should be fine now\n");
|
||
output->con = NULL;
|
||
}
|
||
|
||
output->to_be_disabled = false;
|
||
}
|
||
|
||
if (output->active && output->con == NULL) {
|
||
DLOG("Need to initialize a Con for output %s\n", output->name);
|
||
output_init_con(output);
|
||
output->changed = false;
|
||
}
|
||
|
||
if (output->changed) {
|
||
output_change_mode(conn, output);
|
||
output->changed = false;
|
||
}
|
||
}
|
||
|
||
if (TAILQ_EMPTY(&outputs)) {
|
||
ELOG("No outputs found via RandR, disabling\n");
|
||
disable_randr(conn);
|
||
}
|
||
|
||
//ewmh_update_workarea();
|
||
|
||
#if 0
|
||
/* Just go through each active output and associate one workspace */
|
||
TAILQ_FOREACH(output, &outputs, outputs) {
|
||
if (!output->active || output->current_workspace != NULL)
|
||
continue;
|
||
ws = get_first_workspace_for_output(output);
|
||
initialize_output(conn, output, ws);
|
||
}
|
||
#endif
|
||
|
||
/* render_layout flushes */
|
||
tree_render();
|
||
}
|
||
|
||
/*
|
||
* We have just established a connection to the X server and need the initial
|
||
* XRandR information to setup workspaces for each screen.
|
||
*
|
||
*/
|
||
void randr_init(int *event_base) {
|
||
const xcb_query_extension_reply_t *extreply;
|
||
|
||
extreply = xcb_get_extension_data(conn, &xcb_randr_id);
|
||
if (!extreply->present)
|
||
disable_randr(conn);
|
||
else randr_query_outputs();
|
||
|
||
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);
|
||
}
|