456 lines
17 KiB
C
456 lines
17 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 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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* workspace.c: Functions for modifying workspaces
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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 <limits.h>
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#include <err.h>
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#include "util.h"
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#include "data.h"
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#include "i3.h"
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#include "config.h"
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#include "xcb.h"
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#include "table.h"
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#include "xinerama.h"
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#include "layout.h"
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#include "workspace.h"
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#include "client.h"
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/*
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* Returns a pointer to the workspace with the given number (starting at 0),
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* creating the workspace if necessary (by allocating the necessary amount of
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* memory and initializing the data structures correctly).
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*
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*/
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Workspace *workspace_get(int number) {
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if (number > (num_workspaces-1)) {
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int old_num_workspaces = num_workspaces;
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/* Convert all container->workspace and client->workspace
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* pointers to numbers representing their workspace. Necessary
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* because the realloc() may make all the pointers invalid, so
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* we need to preserve them this way and restore them later.
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*
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* To distinguish between the first workspace and a NULL
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* pointer, we store <workspace number> + 1. */
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for (int c = 0; c < num_workspaces; c++)
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FOR_TABLE(&(workspaces[c])) {
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Container *con = workspaces[c].table[cols][rows];
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if (con->workspace != NULL) {
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LOG("Handling con %p with pointer %p (num %d)\n", con, con->workspace, con->workspace->num);
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con->workspace = (Workspace*)(con->workspace->num + 1);
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}
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Client *current;
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SLIST_FOREACH(current, &(workspaces[c].focus_stack), focus_clients) {
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if (current->workspace == NULL)
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continue;
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LOG("Handling client %p with pointer %p (num %d)\n", current, current->workspace, current->workspace->num);
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current->workspace = (Workspace*)(current->workspace->num + 1);
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}
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}
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/* preserve c_ws */
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c_ws = (Workspace*)(c_ws->num);
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LOG("We need to initialize that one\n");
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num_workspaces = number+1;
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workspaces = realloc(workspaces, num_workspaces * sizeof(Workspace));
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for (int c = old_num_workspaces; c < num_workspaces; c++) {
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memset(&workspaces[c], 0, sizeof(Workspace));
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workspaces[c].screen = NULL;
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workspaces[c].num = c;
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TAILQ_INIT(&(workspaces[c].floating_clients));
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expand_table_cols(&(workspaces[c]));
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expand_table_rows(&(workspaces[c]));
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workspace_set_name(&(workspaces[c]), NULL);
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}
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c_ws = workspace_get((int)c_ws);
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for (int c = 0; c < old_num_workspaces; c++)
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FOR_TABLE(&(workspaces[c])) {
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Container *con = workspaces[c].table[cols][rows];
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if (con->workspace != NULL) {
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LOG("Handling con %p with (num %d)\n", con, con->workspace);
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con->workspace = workspace_get((int)con->workspace - 1);
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}
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Client *current;
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SLIST_FOREACH(current, &(workspaces[c].focus_stack), focus_clients) {
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if (current->workspace == NULL)
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continue;
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LOG("Handling client %p with (num %d)\n", current, current->workspace);
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current->workspace = workspace_get((int)current->workspace - 1);
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}
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}
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LOG("done\n");
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}
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return &(workspaces[number]);
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}
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/*
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* Sets the name (or just its number) for the given workspace. This has to
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* be called for every workspace as the rendering function
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* (render_internal_bar) relies on workspace->name and workspace->name_len
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* being ready-to-use.
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*
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*/
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void workspace_set_name(Workspace *ws, const char *name) {
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char *label;
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int ret;
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if (name != NULL)
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ret = asprintf(&label, "%d: %s", ws->num + 1, name);
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else ret = asprintf(&label, "%d", ws->num + 1);
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if (ret == -1)
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errx(1, "asprintf() failed");
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FREE(ws->name);
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ws->name = convert_utf8_to_ucs2(label, &(ws->name_len));
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if (config.font != NULL)
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ws->text_width = predict_text_width(global_conn, config.font, ws->name, ws->name_len);
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else ws->text_width = 0;
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free(label);
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}
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/*
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* Returns true if the workspace is currently visible. Especially important for
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* multi-monitor environments, as they can have multiple currenlty active
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* workspaces.
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*
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*/
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bool workspace_is_visible(Workspace *ws) {
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return (ws->screen->current_workspace == ws->num);
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}
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/*
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* Switches to the given workspace
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*
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*/
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void workspace_show(xcb_connection_t *conn, int workspace) {
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bool need_warp = false;
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xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
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/* t_ws (to workspace) is just a convenience pointer to the workspace we’re switching to */
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Workspace *t_ws = workspace_get(workspace-1);
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LOG("show_workspace(%d)\n", workspace);
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/* Store current_row/current_col */
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c_ws->current_row = current_row;
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c_ws->current_col = current_col;
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/* Check if the workspace has not been used yet */
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workspace_initialize(t_ws, c_ws->screen);
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if (c_ws->screen != t_ws->screen) {
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/* We need to switch to the other screen first */
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LOG("moving over to other screen.\n");
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/* Store the old client */
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Client *old_client = CUR_CELL->currently_focused;
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c_ws = workspace_get(t_ws->screen->current_workspace);
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current_col = c_ws->current_col;
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current_row = c_ws->current_row;
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if (CUR_CELL->currently_focused != NULL)
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need_warp = true;
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else {
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Rect *dims = &(c_ws->screen->rect);
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xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0,
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dims->x + (dims->width / 2), dims->y + (dims->height / 2));
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}
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/* Re-decorate the old client, it’s not focused anymore */
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if ((old_client != NULL) && !old_client->dock)
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redecorate_window(conn, old_client);
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else xcb_flush(conn);
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}
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/* Check if we need to change something or if we’re already there */
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if (c_ws->screen->current_workspace == (workspace-1)) {
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Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
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if (last_focused != SLIST_END(&(c_ws->focus_stack)))
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set_focus(conn, last_focused, true);
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if (need_warp) {
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client_warp_pointer_into(conn, last_focused);
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xcb_flush(conn);
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}
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return;
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}
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t_ws->screen->current_workspace = workspace-1;
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Workspace *old_workspace = c_ws;
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c_ws = workspace_get(workspace-1);
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/* Unmap all clients of the old workspace */
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workspace_unmap_clients(conn, old_workspace);
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current_row = c_ws->current_row;
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current_col = c_ws->current_col;
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LOG("new current row = %d, current col = %d\n", current_row, current_col);
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workspace_map_clients(conn, c_ws);
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/* POTENTIAL TO IMPROVE HERE: due to the call to _map_clients first and
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* render_layout afterwards, there is a short flickering on the source
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* workspace (assign ws 3 to screen 0, ws 4 to screen 1, create single
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* client on ws 4, move it to ws 3, switch to ws 3, you’ll see the
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* flickering). */
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/* Restore focus on the new workspace */
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Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
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if (last_focused != SLIST_END(&(c_ws->focus_stack)))
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set_focus(conn, last_focused, true);
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else xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, root, XCB_CURRENT_TIME);
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render_layout(conn);
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/* We can warp the pointer only after the window has been
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* reconfigured in render_layout, otherwise the pointer will
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* be warped to the old position, which will not work when we
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* moved it to another screen. */
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if (last_focused != SLIST_END(&(c_ws->focus_stack)) && need_warp) {
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client_warp_pointer_into(conn, last_focused);
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xcb_flush(conn);
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}
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}
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/*
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* Parses the preferred_screen property of a workspace. You can either specify
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* the screen number (it is not given that the screen numbering always stays
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* the same) or the screen coordinates (exact coordinates, e.g. 1280 will match
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* the screen starting at x=1280, but 1281 will not). For coordinates, you can
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* either specify an x coordinate ("1280") or an y coordinate ("x800") or both
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* ("1280x800").
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*
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*/
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static i3Screen *get_screen_from_preference(struct screens_head *slist, char *preference) {
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i3Screen *screen;
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char *rest;
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int preferred_screen = strtol(preference, &rest, 10);
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LOG("Getting screen for preference \"%s\" (%d)\n", preference, preferred_screen);
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if ((rest == preference) || (preferred_screen >= num_screens)) {
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int x = INT_MAX, y = INT_MAX;
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if (strchr(preference, 'x') != NULL) {
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/* Check if only the y coordinate was specified */
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if (*preference == 'x')
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y = atoi(preference+1);
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else {
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x = atoi(preference);
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y = atoi(strchr(preference, 'x') + 1);
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}
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} else {
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x = atoi(preference);
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}
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LOG("Looking for screen at %d x %d\n", x, y);
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TAILQ_FOREACH(screen, slist, screens)
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if ((x == INT_MAX || screen->rect.x == x) &&
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(y == INT_MAX || screen->rect.y == y)) {
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LOG("found %p\n", screen);
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return screen;
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}
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LOG("none found\n");
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return NULL;
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} else {
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int c = 0;
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TAILQ_FOREACH(screen, slist, screens)
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if (c++ == preferred_screen)
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return screen;
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}
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return NULL;
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}
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/*
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* Initializes the given workspace if it is not already initialized. The given
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* screen is to be understood as a fallback, if the workspace itself either
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* was not assigned to a particular screen or cannot be placed there because
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* the screen is not attached at the moment.
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*
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*/
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void workspace_initialize(Workspace *ws, i3Screen *screen) {
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if (ws->screen != NULL) {
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LOG("Workspace already initialized\n");
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return;
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}
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/* If this workspace has no preferred screen or if the screen it wants
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* to be on is not available at the moment, we initialize it with
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* the screen which was given */
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if (ws->preferred_screen == NULL ||
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(ws->screen = get_screen_from_preference(virtual_screens, ws->preferred_screen)) == NULL)
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ws->screen = screen;
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else { LOG("yay, found assignment\n"); }
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/* Copy the dimensions from the virtual screen */
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memcpy(&(ws->rect), &(ws->screen->rect), sizeof(Rect));
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}
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/*
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* Gets the first unused workspace for the given screen, taking into account
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* the preferred_screen setting of every workspace (workspace assignments).
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*
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*/
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Workspace *get_first_workspace_for_screen(struct screens_head *slist, i3Screen *screen) {
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Workspace *result = NULL;
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for (int c = 0; c < num_workspaces; c++) {
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Workspace *ws = workspace_get(c);
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if (ws->preferred_screen == NULL ||
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!screens_are_equal(get_screen_from_preference(slist, ws->preferred_screen), screen))
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continue;
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result = ws;
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break;
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}
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if (result == NULL) {
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/* No assignment found, returning first unused workspace */
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for (int c = 0; c < num_workspaces; c++) {
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if (workspaces[c].screen != NULL)
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continue;
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result = workspace_get(c);
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break;
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}
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}
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if (result != NULL) {
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workspace_initialize(result, screen);
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return result;
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}
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LOG("WARNING: No free workspace found to assign!\n");
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return NULL;
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}
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/*
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* Maps all clients (and stack windows) of the given workspace.
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*
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*/
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void workspace_map_clients(xcb_connection_t *conn, Workspace *ws) {
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Client *client;
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ignore_enter_notify_forall(conn, ws, true);
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/* Map all clients on the new workspace */
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FOR_TABLE(ws)
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CIRCLEQ_FOREACH(client, &(ws->table[cols][rows]->clients), clients)
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client_map(conn, client);
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/* Map all floating clients */
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if (!ws->floating_hidden)
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TAILQ_FOREACH(client, &(ws->floating_clients), floating_clients)
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client_map(conn, client);
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/* Map all stack windows, if any */
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struct Stack_Window *stack_win;
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SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
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if (stack_win->container->workspace == ws)
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xcb_map_window(conn, stack_win->window);
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ignore_enter_notify_forall(conn, ws, false);
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}
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/*
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* Unmaps all clients (and stack windows) of the given workspace.
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*
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* This needs to be called separately when temporarily rendering
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* a workspace which is not the active workspace to force
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* reconfiguration of all clients, like in src/xinerama.c when
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* re-assigning a workspace to another screen.
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*
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*/
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void workspace_unmap_clients(xcb_connection_t *conn, Workspace *u_ws) {
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Client *client;
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struct Stack_Window *stack_win;
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/* Ignore notify events because they would cause focus to be changed */
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ignore_enter_notify_forall(conn, u_ws, true);
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/* Unmap all clients of the given workspace */
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int unmapped_clients = 0;
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FOR_TABLE(u_ws)
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CIRCLEQ_FOREACH(client, &(u_ws->table[cols][rows]->clients), clients) {
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LOG("unmapping normal client %p / %p / %p\n", client, client->frame, client->child);
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client_unmap(conn, client);
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unmapped_clients++;
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}
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/* To find floating clients, we traverse the focus stack */
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SLIST_FOREACH(client, &(u_ws->focus_stack), focus_clients) {
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if (!client_is_floating(client))
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continue;
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LOG("unmapping floating client %p / %p / %p\n", client, client->frame, client->child);
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client_unmap(conn, client);
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unmapped_clients++;
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}
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/* If we did not unmap any clients, the workspace is empty and we can destroy it, at least
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* if it is not the current workspace. */
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if (unmapped_clients == 0 && u_ws != c_ws) {
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/* Re-assign the workspace of all dock clients which use this workspace */
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Client *dock;
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LOG("workspace %p is empty\n", u_ws);
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SLIST_FOREACH(dock, &(u_ws->screen->dock_clients), dock_clients) {
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if (dock->workspace != u_ws)
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continue;
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LOG("Re-assigning dock client to c_ws (%p)\n", c_ws);
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dock->workspace = c_ws;
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}
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u_ws->screen = NULL;
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}
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/* Unmap the stack windows on the given workspace, if any */
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SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
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if (stack_win->container->workspace == u_ws)
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xcb_unmap_window(conn, stack_win->window);
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ignore_enter_notify_forall(conn, u_ws, false);
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}
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/*
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* Goes through all clients on the given workspace and updates the workspace’s
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* urgent flag accordingly.
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*
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*/
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void workspace_update_urgent_flag(Workspace *ws) {
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Client *current;
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SLIST_FOREACH(current, &(ws->focus_stack), focus_clients) {
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if (!current->urgent)
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continue;
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ws->urgent = true;
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return;
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}
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ws->urgent = false;
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}
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