diff options
Diffstat (limited to 'vwm.c')
| -rw-r--r-- | vwm.c | 1376 |
1 files changed, 1376 insertions, 0 deletions
@@ -0,0 +1,1376 @@ +/* + * VWM - Vito's Window Manager, a minimal, non-reparenting X11 window manager + * + * Copyright (C) 2012 Vito Caputo - <vcaputo@gnugeneration.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +/* Work started 8/3/2012, in the form of research into creating WM's using xcb, + * clearly I decided to just use Xlib instead at some point, and here we are. + */ + +#include <X11/Xlib.h> +#include <X11/keysym.h> +#include <X11/cursorfont.h> +#include <X11/Xatom.h> +#include <unistd.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <stdint.h> +#include <string.h> +#include <inttypes.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <sys/wait.h> + +#include "vwm.h" + +#define WINDOW_BORDER_WIDTH 1 +#define WINDOW_CASCADE_DELTA 100 + +typedef enum _vwm_context_focus_t { + VWM_CONTEXT_FOCUS_OTHER = 0, + VWM_CONTEXT_FOCUS_DESKTOP, + VWM_CONTEXT_FOCUS_SHELF +} vwm_context_focus_t; + + +static LIST_HEAD(desktops); /* global list of all (virtual) desktops in spatial created-in order */ +static LIST_HEAD(desktops_mru); /* global list of all (virtual) desktops in MRU order */ +static LIST_HEAD(windows); /* global list of all managed windows kept in MRU order */ +static vwm_desktop_t *focused_desktop = NULL; /* currently focused (virtual) desktop */ +static vwm_window_t *focused_shelf = NULL; /* currently focused shelved window */ +static vwm_context_focus_t focused_context = VWM_CONTEXT_FOCUS_DESKTOP; /* currently focused context */ +static int key_is_grabbed = 0; /* flag for tracking keyboard grab state */ + +static Display *display; +static Colormap cmap; + +#define color(_sym, _str) \ +static XColor _sym ## _color; +#include "colors.def" +#undef color + +static int screen_num; +static GC gc; +static Atom wm_delete_atom; +static Atom wm_protocols_atom; + +static void vwm_win_focus(vwm_window_t *vwin); +static void vwm_keypressed(Window win, XEvent *keypress); + +/* animated vwm logo done with simple XOR'd lines, a display of the WM being started and ready */ +typedef struct _vwm_point_t { + float x, y; +} vwm_point_t; + +vwm_point_t vwm_logo[] = { {0.0, 0.0}, + {0.170731, 1.0}, + {0.341463, 0.0}, + {0.463414, 1.0}, + {0.536585, 0.6}, + {0.609756, 1.0}, + {0.731707, 0.0}, + {0.804878, 0.4}, + {0.878048, 0.0}, + {1.0, 1.0} }; + +static void vwm_draw_logo(void) +{ + Window root; + int x, y, i; + unsigned int width, height, border_width, depth, yoff, xoff; + XPoint points[sizeof(vwm_logo) / sizeof(vwm_point_t)]; + + XGrabServer(display); + + /* learn the dimensions of the root window */ + XGetGeometry(display, RootWindow(display, screen_num), &root, &x, &y, &width, &height, &border_width, &depth); + + yoff = ((float)height * .375); + xoff = 0; + height /= 4; + + /* the logo gets shrunken vertically until it's essentially a flat line */ + while(height--) { + /* scale and center the points to the screen size */ + for(i = 0; i < sizeof(points) / sizeof(XPoint); i++) { + points[i].x = xoff + (vwm_logo[i].x * (float)width); + points[i].y = (vwm_logo[i].y * (float)height) + yoff; + } + + XDrawLines(display, RootWindow(display, screen_num), gc, points, sizeof(points) / sizeof(XPoint), CoordModeOrigin); + XFlush(display); + usleep(3333); + XDrawLines(display, RootWindow(display, screen_num), gc, points, sizeof(points) / sizeof(XPoint), CoordModeOrigin); + + /* the width is shrunken as well, but only by as much as it is tall */ + yoff++; + width -= 4; + xoff += 2; + } + + XUngrabServer(display); +} + + +/* XXX: for now just double forks to avoid having to collect return statuses of the long-running process */ +static void vwm_launch(char **argv) +{ + if(!fork()) { + if(!fork()) { + /* child */ + execvp(argv[0], argv); + } + exit(0); + } + wait(NULL); +} + + +/* switch to the desired context if it isn't already the focused one, inform caller if anything happened */ +static int vwm_context_focus(vwm_context_focus_t desired_context) +{ + vwm_context_focus_t entry_context = focused_context; + + switch(focused_context) { + vwm_window_t *vwin; + + case VWM_CONTEXT_FOCUS_SHELF: + if(desired_context == VWM_CONTEXT_FOCUS_SHELF) break; + + /* desired == DESKTOP && focused == SHELF */ + + VWM_TRACE("unmapping shelf window \"%s\"", focused_shelf->name); + XUnmapWindow(display, focused_shelf->window); + XFlush(display); /* for a more responsive feel */ + + /* map the focused desktop */ + list_for_each_entry(vwin, &windows, windows) { + if(vwin->desktop == focused_desktop && !vwin->shelved) { + VWM_TRACE("Mapping desktop window \"%s\"", vwin->name); + XMapWindow(display, vwin->window); + } + } + + if(focused_desktop->focused_window) { + VWM_TRACE("Focusing \"%s\"", focused_desktop->focused_window->name); + XSetInputFocus(display, focused_desktop->focused_window->window, RevertToPointerRoot, CurrentTime); + } + + focused_context = VWM_CONTEXT_FOCUS_DESKTOP; + break; + + case VWM_CONTEXT_FOCUS_DESKTOP: + /* unmap everything, map the shelf */ + if(desired_context == VWM_CONTEXT_FOCUS_DESKTOP) break; + + /* desired == SHELF && focused == DESKTOP */ + + /* there should be a focused shelf if the shelf contains any windows, we NOOP the switch if the shelf is empty. */ + if(focused_shelf) { + /* unmap everything on the current desktop */ + list_for_each_entry(vwin, &windows, windows) { + if(vwin->desktop == focused_desktop) { + VWM_TRACE("Unmapping desktop window \"%s\"", vwin->name); + XUnmapWindow(display, vwin->window); + } + } + + XFlush(display); /* for a more responsive feel */ + + VWM_TRACE("Mapping shelf window \"%s\"", focused_shelf->name); + XMapWindow(display, focused_shelf->window); + vwm_win_focus(focused_shelf); + + focused_context = VWM_CONTEXT_FOCUS_SHELF; + } + break; + + default: + VWM_BUG("unexpected focused context %x", focused_context); + break; + } + + /* return if the context has been changed, the caller may need to branch differently if nothing happened */ + return (focused_context != entry_context); +} + + +/* make the specified desktop the most recently used one */ +static void vwm_desktop_mru(vwm_desktop_t *d) +{ + list_move(&d->desktops_mru, &desktops_mru); +} + + +/* focus a virtual desktop */ +/* this switches to the desktop context if necessary, maps and unmaps windows accordingly if necessary */ +static int vwm_desktop_focus(vwm_desktop_t *d) +{ + XGrabServer(display); + XSync(display, False); + + /* if the context switched and the focused desktop is the desired desktop there's nothing else to do */ + if( (vwm_context_focus(VWM_CONTEXT_FOCUS_DESKTOP) && focused_desktop != d) || focused_desktop != d) { + vwm_window_t *w; + + /* unmap the windows on the currently focused desktop, map those on the newly focused one */ + list_for_each_entry(w, &windows, windows) { + if(w->shelved) continue; + + if(w->desktop == focused_desktop) { + VWM_TRACE("Unmapping \"%s\"", w->name); + XUnmapWindow(display, w->window); + } + } + + XFlush(display); + + list_for_each_entry(w, &windows, windows) { + if(w->shelved) continue; + + if(w->desktop == d) { + VWM_TRACE("Mapping \"%s\"", w->name); + XMapWindow(display, w->window); + } + } + + focused_desktop = d; + } + + /* directly focus the desktop's focused window if there is one, we don't use vwm_win_focus() intentionally XXX */ + if(focused_desktop->focused_window) { + VWM_TRACE("Focusing \"%s\"", focused_desktop->focused_window->name); + XSetInputFocus(display, focused_desktop->focused_window->window, RevertToPointerRoot, CurrentTime); + } + + XUngrabServer(display); + + return 1; +} + + +/* create a virtual desktop */ +static vwm_desktop_t * vwm_desktop_create(char *name) +{ + vwm_desktop_t *d; + + d = malloc(sizeof(vwm_desktop_t)); + if(d == NULL) { + VWM_PERROR("Failed to allocate desktop"); + goto _fail; + } + + d->name = name == NULL ? name : strdup(name); + d->focused_window = NULL; + + list_add_tail(&d->desktops, &desktops); + list_add_tail(&d->desktops_mru, &desktops_mru); + + return d; + +_fail: + return NULL; +} + + +/* destroy a virtual desktop */ +static void vwm_desktop_destroy(vwm_desktop_t *d) +{ + /* silently refuse to destroy a desktop having windows (for now) */ + /* there's _always_ a focused window on a desktop having mapped windows */ + /* also silently refuse to destroy the last desktop (for now) */ + if(d->focused_window || (d->desktops.next == d->desktops.prev)) return; + + /* focus another desktop if we're the focused desktop */ + if(d == focused_desktop) { + /* we just look for one that is different from ours, relative to ours, looking at the next one then the previous */ + if(d->desktops.next != &desktops) { + vwm_desktop_focus(list_entry(d->desktops.next, vwm_desktop_t, desktops)); + } else if(d->desktops.prev != &desktops) { + vwm_desktop_focus(list_entry(d->desktops.prev, vwm_desktop_t, desktops)); + } + } + + list_del(&d->desktops); + list_del(&d->desktops_mru); +} + + +/* make the specified window the most recently used one */ +static void vwm_win_mru(vwm_window_t *vwin) +{ + list_move(&vwin->windows, &windows); +} + + +/* send a client message to a window (currently used for WM_DELETE) */ +static void vwm_win_message(vwm_window_t *vwin, Atom type, long foo) +{ + XEvent event; + + memset(&event, 0, sizeof(event)); + event.xclient.type = ClientMessage; + event.xclient.window = vwin->window; + event.xclient.message_type = type; + event.xclient.format = 32; + event.xclient.data.l[0] = foo; + event.xclient.data.l[1] = CurrentTime; /* XXX TODO: is CurrentTime actually correct to use for this purpose? */ + + XSendEvent(display, vwin->window, False, 0, &event); +} + + +/* looks up the window in the global window list */ +static vwm_window_t * vwm_win_lookup(Window win) +{ + vwm_window_t *tmp, *vwin = NULL; + + list_for_each_entry(tmp, &windows, windows) { + if(tmp->window == win) { + vwin = tmp; + break; + } + } + + return vwin; +} + + +/* helper for returning the currently focused window (considers current context...), may return NULL */ +static vwm_window_t * vwm_win_focused(void) +{ + vwm_window_t *vwin = NULL; + + switch(focused_context) { + case VWM_CONTEXT_FOCUS_SHELF: + vwin = focused_shelf; + break; + + case VWM_CONTEXT_FOCUS_DESKTOP: + if(focused_desktop) vwin = focused_desktop->focused_window; + break; + + default: + VWM_BUG("Unsupported context"); + break; + } + + return vwin; +} + +/* fullscreen a window with borders obscured "allscreen" */ +static void vwm_win_allscreen(vwm_window_t *vwin) +{ + Window root; + int x, y; + unsigned int width, height, border_width, depth; + + if(vwin->fullscreened == 2) return; + + XGetGeometry(display, RootWindow(display, screen_num), &root, &x, &y, &width, &height, &border_width, &depth); + XGetGeometry(display, vwin->window, &root, &vwin->client.x, &vwin->client.y, &vwin->client.width, &vwin->client.height, &border_width, &depth); + XMoveResizeWindow(display, vwin->window, -border_width, -border_width, width, height); + vwin->fullscreened = 2; +} + +/* fullscreen a window */ +static void vwm_win_fullscreen(vwm_window_t *vwin) +{ + Window root; + int x, y; + unsigned int width, height, border_width, depth; + + if(vwin->fullscreened == 1) return; + + XGetGeometry(display, RootWindow(display, screen_num), &root, &x, &y, &width, &height, &border_width, &depth); + /* TODO: do not remember the current geometry if we're going from allscreen to fullscreen! */ + XGetGeometry(display, vwin->window, &root, &vwin->client.x, &vwin->client.y, &vwin->client.width, &vwin->client.height, &border_width, &depth); + XMoveResizeWindow(display, vwin->window, 0, 0, width - (border_width * 2), height - (border_width * 2)); + vwin->fullscreened = 1; +} + + +/* restore a window to its non-fullscreened size and coordinates */ +static void vwm_win_restore(vwm_window_t *vwin) +{ + if(!vwin->fullscreened) return; + + XMoveResizeWindow(display, vwin->window, vwin->client.x, vwin->client.y, vwin->client.width, vwin->client.height); + vwin->fullscreened = 0; +} + + +/* focus a window */ +/* this updates window borders as needed and the X input focus */ +static void vwm_win_focus(vwm_window_t *vwin) +{ + VWM_TRACE("focusing: %#x", (unsigned int)vwin->window); + + /* change the focus to the new window */ + XSetInputFocus(display, vwin->window, RevertToPointerRoot, CurrentTime); + + /* update the border color accordingly */ + if(vwin->shelved) { + /* set the border of the newly focused window to the shelved color */ + XSetWindowBorder(display, vwin->window, shelved_window_border_color.pixel); + } else { + if(vwin->desktop == focused_desktop && focused_desktop->focused_window) { + /* if we've changed focus within the same desktop, set the currently focused window border to the + * unfocused color. Otherwise, we want to leave the focused color on the old window on the old desktop */ + XSetWindowBorder(display, focused_desktop->focused_window->window, unfocused_window_border_color.pixel); + } + + /* set the border of the newly focused window to the focused color */ + XSetWindowBorder(display, vwin->window, focused_window_border_color.pixel); + + /* persist this on a per-desktop basis so it can be restored on desktop switches */ + focused_desktop->focused_window = vwin; + } +} + + +/* focus the next window on a virtual desktop relative to the supplied window */ +static vwm_window_t * vwm_win_focus_next(vwm_window_t *vwin, vwm_context_focus_t context) +{ + vwm_window_t *next; + + list_for_each_entry(next, &vwin->windows, windows) { + /* searching for the next mapped window in this context, using vwin->windows as the head */ + if(&next->windows == &windows) continue; /* XXX: skip the containerless head, we're leveraging the circular list implementation */ + + if(next->mapped && ((context == VWM_CONTEXT_FOCUS_SHELF && next->shelved) || (context == VWM_CONTEXT_FOCUS_DESKTOP && !next->shelved && next->desktop == focused_desktop))) break; + } + + switch(context) { + case VWM_CONTEXT_FOCUS_DESKTOP: + if(next != next->desktop->focused_window) { + /* focus the changed window */ + vwm_win_focus(next); + XRaiseWindow(display, next->window); + } + break; + + case VWM_CONTEXT_FOCUS_SHELF: + if(next != focused_shelf) { + /* shelf switch, unmap the focused shelf and take it over */ + VWM_TRACE("Unmapping window \"%s\"", focused_shelf->name); + XUnmapWindow(display, focused_shelf->window); + + XFlush(display); + + VWM_TRACE("Mapping window \"%s\"", next->name); + XMapWindow(display, next->window); + focused_shelf = next; + vwm_win_focus(next); + } + break; + + default: + VWM_ERROR("Unhandled focus context %#x", context); + break; + } + + VWM_TRACE("\"%s\"", next->name); + + return next; +} + + +/* shelves a window, if the window is focused we focus the next one (if possible) */ +static void vwm_win_shelve(vwm_window_t *vwin) +{ + /* already shelved, NOOP */ + if(vwin->shelved) return; + + /* shelving focused window, focus the next window */ + if(vwin == vwin->desktop->focused_window) { + vwm_win_mru(vwm_win_focus_next(vwin, VWM_CONTEXT_FOCUS_DESKTOP)); + } + + if(vwin == vwin->desktop->focused_window) { + /* TODO: we can probably put this into vwm_win_focus_next() and have it always handled there... */ + vwin->desktop->focused_window = NULL; + } + + vwin->shelved = 1; + vwm_win_mru(vwin); + + /* newly shelved windows always become the focused shelf */ + focused_shelf = vwin; + + VWM_TRACE("Unmapping \"%s\"", vwin->name); + XUnmapWindow(display, vwin->window); +} + + +typedef enum _vwm_grab_mode_t { + VWM_NOT_GRABBED = 0, + VWM_GRABBED +} vwm_grab_mode_t; + +/* manages a new window (called in response to CreateNotify events, and during startup to manage existing windows) */ +static vwm_window_t * vwm_win_manage(Window win, vwm_grab_mode_t grabbed) +{ + XWindowAttributes attrs; + vwm_window_t *vwin, *focused; + + /* prevent races */ + if(!grabbed) { + XGrabServer(display); + XSync(display, False); + } + + /* verify the window still exists */ + if(!XGetWindowAttributes(display, win, &attrs)) goto _fail_grabbed; + + /* honor overrides, don't manage InputOnly windows */ + if(attrs.override_redirect || attrs.class == InputOnly) goto _fail_grabbed; + + VWM_TRACE("Managing %#x", (unsigned int)win); + + /* if no desktops exist, implicitly create one */ + if(!focused_desktop) { + /* TODO: interactively name desktops */ + vwm_desktop_focus(vwm_desktop_create(NULL)); + vwm_desktop_mru(focused_desktop); + } + + /* allocate and initialize our per-managed-window structure and get it on the global windows list */ + vwin = (vwm_window_t *)malloc(sizeof(vwm_window_t)); + if(vwin == NULL) { + VWM_PERROR("Failed to allocate vwin"); + goto _fail_grabbed; + } + + XUngrabButton(display, AnyButton, AnyModifier, win); + XGrabButton(display, AnyButton, Mod1Mask, win, False, (PointerMotionMask | ButtonPressMask | ButtonReleaseMask), GrabModeAsync, GrabModeAsync, None, None); + XGrabKey(display, AnyKey, Mod1Mask, win, False, GrabModeAsync, GrabModeAsync); + XSetWindowBorder(display, win, unfocused_window_border_color.pixel); + + vwin->name = NULL; + XFetchName(display, win, &vwin->name); + + vwin->hints = XAllocSizeHints(); + if(!vwin->hints) { + VWM_PERROR("Failed to allocate WM hints"); + goto _fail_grabbed; + } + XGetWMNormalHints(display, win, vwin->hints, &vwin->hints_supplied); + + vwin->desktop = focused_desktop; + vwin->window = win; + vwin->fullscreened = 0; + vwin->shelved = (focused_context == VWM_CONTEXT_FOCUS_SHELF); /* if we're in the shelf when the window is created, the window is shelved */ + vwin->mapped = (attrs.map_state != IsUnmapped); + + /* remember whatever the current attributes are */ + vwin->client.x = attrs.x; + vwin->client.y = attrs.y; + vwin->client.width = attrs.width; + vwin->client.height = attrs.height; + + VWM_TRACE("hints: flags=%lx x=%i y=%i w=%i h=%i minw=%i minh=%i maxw=%i maxh=%i winc=%i hinc=%i basew=%i baseh=%i grav=%x", + vwin->hints->flags, + vwin->hints->x, vwin->hints->y, + vwin->hints->width, vwin->hints->height, + vwin->hints->min_width, vwin->hints->min_height, + vwin->hints->max_width, vwin->hints->max_height, + vwin->hints->width_inc, vwin->hints->height_inc, + vwin->hints->base_width, vwin->hints->base_height, + vwin->hints->win_gravity); + + if((vwin->hints_supplied & (USSize | PSize))) { + vwin->client.width = vwin->hints->base_width; + vwin->client.height = vwin->hints->base_height; + } + + /* put it on the global windows list, if there's a focused window insert the new one after it */ + if(!list_empty(&windows) && (focused = vwm_win_focused())) { + /* insert the vwin immediately after the focused window, so Mod1+Tab goes to the new window */ + list_add(&vwin->windows, &focused->windows); + } else { + list_add(&vwin->windows, &windows); + } + + /* if the desktop has no focused window yet, automatically focus the newly managed one */ + /* TODO: how does this interact with the shelf? */ + if(!focused_desktop->focused_window) { + VWM_TRACE("Mapped window \"%s\" is alone on desktop \"%s\", focusing", vwin->name, focused_desktop->name); + vwm_win_focus(vwin); + } + + if(!grabbed) XUngrabServer(display); + + return vwin; + +_fail_grabbed: + if(!grabbed) XUngrabServer(display); + + return NULL; +} + + +/* helper for (idempotently) unfocusing a window, deals with context switching etc... */ +static void vwm_win_unfocus(vwm_window_t *vwin) +{ + /* if we're the shelved window, cycle the focus to the next shelved window if possible, if there's no more shelf, switch to the desktop */ + /* TODO: what if it's not mapped but goes away??? we don't want to try take the InputFocus it when not mapped... XXX TODO */ + if(vwin == focused_shelf) { + VWM_TRACE("unfocusing focused shelf"); + vwm_win_focus_next(vwin, VWM_CONTEXT_FOCUS_SHELF); + + if(vwin == focused_shelf) { + VWM_TRACE("shelf empty, leaving"); + /* no other shelved windows, exit the shelf context */ + vwm_context_focus(VWM_CONTEXT_FOCUS_DESKTOP); + focused_shelf = NULL; + } + } + + /* if we're the focused window cycle the focus to the next window on the desktop if possible */ + if(vwin->desktop->focused_window == vwin) { + VWM_TRACE("unfocusing focused window"); + vwm_win_focus_next(vwin, VWM_CONTEXT_FOCUS_DESKTOP); + } + + if(vwin->desktop->focused_window == vwin) { + VWM_TRACE("desktop empty"); + vwin->desktop->focused_window = NULL; + } +} + + +/* migrate a window to a new desktop, focuses the destionation desktop as well */ +static void vwm_win_migrate(vwm_window_t *vwin, vwm_desktop_t *desktop) +{ + /* go through the motions of unfocusing the window if it is focused */ + vwm_win_unfocus(vwin); + + /* ensure not shelved */ + vwin->shelved = 0; + + /* assign the new desktop */ + vwin->desktop = desktop; + + /* currently we always focus the new desktop in a migrate */ + vwm_desktop_focus(desktop); + + /* focus the window so borders get updated */ + vwm_win_focus(vwin); + vwm_win_mru(vwin); + + /* ensure the window is raised */ + XRaiseWindow(display, vwin->window); +} + + +/* unmanages a managed window (called in response to DestroyNotify) */ +static void vwm_win_unmanage(Window win) +{ + vwm_window_t *vwin; + + VWM_TRACE("unmanaging %x", (unsigned int)win); + + XGrabServer(display); + XSync(display, False); + + /* find the window */ + vwin = vwm_win_lookup(win); + + if(!vwin) { + VWM_TRACE("window %x not managed", (unsigned int)win); + goto _ungrab; + } + + /* unfocus the window */ + vwm_win_unfocus(vwin); + + /* remove the window from the global windows list */ + list_del(&vwin->windows); + + if(vwin->name) XFree(vwin->name); + + free(vwin); + +_ungrab: + XUngrabServer(display); +} + + +/* manage all existing windows (for startup) */ +static int vwm_manage_existing(void) +{ + Window root, parent; + Window *children = NULL; + unsigned int n_children, i; + vwm_window_t *vwin; + + XGrabServer(display); + XSync(display, False); + XQueryTree(display, RootWindow(display, screen_num), &root, &parent, &children, &n_children); + + for(i = 0; i < n_children; i++) { + if (children[i] == None) continue; + + if((vwin = vwm_win_manage(children[i], VWM_GRABBED)) == NULL) goto _fail_grabbed; + } + + XUngrabServer(display); + + if(children) XFree(children); + + return 1; + +_fail_grabbed: + XUngrabServer(display); + + if(children) XFree(children); + + return 0; +} + + +/* helper function for resizing a window, how the motion is applied depends on where in the window the impetus event occurred */ +static void compute_resize(vwm_window_t *vwin, XWindowAttributes *attrs, XEvent *impetus, XEvent *terminus, XWindowAttributes *new) +{ + int dw = (attrs->width / 2); + int dh = (attrs->height / 2); + int xdelta = (terminus->xbutton.x_root - impetus->xbutton.x_root); + int ydelta = (terminus->xbutton.y_root - impetus->xbutton.y_root); + int min_width = 0, min_height = 0; + int width_inc = 1, height_inc = 1; + + /* TODO: there's probably a problem here WRT border width, I probably should be considering it. */ + + if(vwin && vwin->hints) { + if((vwin->hints_supplied & PMinSize)) { + min_width = vwin->hints->min_width; + min_height = vwin->hints->min_height; + VWM_TRACE("window size hints exist and minimum sizes are w=%i h=%i", min_width, min_height); + } + + if((vwin->hints_supplied & PResizeInc)) { + width_inc = vwin->hints->width_inc; + height_inc = vwin->hints->height_inc; + VWM_TRACE("window size hints exist and resize increments are w=%i h=%i", width_inc, height_inc); + if(!width_inc) width_inc = 1; + if(!height_inc) height_inc = 1; + } + } + + xdelta = xdelta / width_inc * width_inc; + ydelta = ydelta / height_inc * height_inc; + + if(impetus->xbutton.x < dw && impetus->xbutton.y < dh) { + /* grabbed top left */ + new->x = attrs->x + xdelta; + new->y = attrs->y + ydelta; + new->width = attrs->width - xdelta; + new->height = attrs->height - ydelta; + } else if(impetus->xbutton.x > dw && impetus->xbutton.y < dh) { + /* grabbed top right */ + new->x = attrs->x; + new->y = attrs->y + ydelta; + new->width = attrs->width + xdelta; + new->height = attrs->height - ydelta; + } else if(impetus->xbutton.x < dw && impetus->xbutton.y > dh) { + /* grabbed bottom left */ + new->x = attrs->x + xdelta; + new->y = attrs->y; + new->width = attrs->width - xdelta; + new->height = attrs->height + ydelta; + } else if(impetus->xbutton.x > dw && impetus->xbutton.y > dh) { + /* grabbed bottom right */ + new->x = attrs->x; + new->y = attrs->y; + new->width = attrs->width + xdelta; + new->height = attrs->height + ydelta; + } + + /* constrain the width and height of the window according to the minimums */ + if(new->width < min_width) { + if(attrs->x != new->x) { + new->x -= (min_width - new->width); + } + + new->width = min_width; + } + + if(new->height < min_height) { + if(attrs->y != new->y) { + new->y -= (min_height - new->height); + } + + new->height = min_height; + } +} + + +typedef enum _vwm_adjust_mode_t { + VWM_ADJUST_RESIZE, + VWM_ADJUST_MOVE +} vwm_adjust_mode_t; + +/* XXX: impetus is currently assumed to be an xbutton event */ +static int vwm_clicked(Window win, XEvent *impetus) +{ + XWindowAttributes orig, lastrect; + vwm_window_t *vwin; + + /* verify the window still exists */ + if(!XGetWindowAttributes(display, win, &orig)) goto _fail; + + if(!(vwin = vwm_win_lookup(win))) goto _fail; + + if(impetus->xbutton.state & Mod1Mask) { + int finished = 0; + vwm_adjust_mode_t mode; + + switch(impetus->xbutton.button) { + case Button1: + /* immediately raise the window if we're relocating, + * resizes are supported without raising (which also enables NULL resizes to focus without raising) */ + mode = VWM_ADJUST_MOVE; + XRaiseWindow(display, win); + break; + + case Button3: + /* grab the server on resize for the xor rubber-banding's sake */ + XGrabServer(display); + XSync(display, False); + + XDrawRectangle(display, RootWindow(display, screen_num), gc, orig.x, orig.y, orig.width, orig.height); + lastrect = orig; + + mode = VWM_ADJUST_RESIZE; + break; + + default: + goto _fail; + } + + /* apply Motion events until the button is released, move vs. move+resize is performed depending on the supplied mode */ + while(!finished) { + XEvent event; + XWindowAttributes resized; + + XNextEvent(display, &event); + switch(event.type) { + case ButtonRelease: + switch(mode) { + case VWM_ADJUST_MOVE: + XMoveWindow(display, win, + orig.x + (event.xbutton.x_root - impetus->xbutton.x_root), + orig.y + (event.xbutton.y_root - impetus->xbutton.y_root)); + break; + + case VWM_ADJUST_RESIZE: + compute_resize(vwin, &orig, impetus, &event, &resized); + /* move and resize the window @ resized */ + XDrawRectangle(display, RootWindow(display, screen_num), gc, lastrect.x, lastrect.y, lastrect.width, lastrect.height); + XMoveResizeWindow(display, win, resized.x, resized.y, resized.width, resized.height); + XUngrabServer(display); + + break; + + default: + break; + } + /* once you manipulate the window it's no longer fullscreened, simply hitting Mod1+Return once will restore fullscreened mode */ + vwin->fullscreened = 0; + finished = 1; + break; + + case MotionNotify: + switch(mode) { + case VWM_ADJUST_MOVE: + XMoveWindow(display, win, + orig.x + (event.xmotion.x_root - impetus->xbutton.x_root), + orig.y + (event.xmotion.y_root - impetus->xbutton.y_root)); + break; + + case VWM_ADJUST_RESIZE: + /* XXX: it just so happens the XMotionEvent structure is identical to XButtonEvent in the fields + * needed by compute_resize... */ + compute_resize(vwin, &orig, impetus, &event, &resized); + /* erase the last rectangle */ + XDrawRectangle(display, RootWindow(display, screen_num), gc, lastrect.x, lastrect.y, lastrect.width, lastrect.height); + /* draw a frame @ resized coordinates */ + XDrawRectangle(display, RootWindow(display, screen_num), gc, resized.x, resized.y, resized.width, resized.height); + /* remember the last rectangle */ + lastrect = resized; + break; + + default: + break; + } + break; + + default: + VWM_ERROR("unexpected event during window adjust %i", event.type); + break; + } + } + } + + /* always set the input focus to the clicked window, note if we allow this to happen on the root window, it enters sloppy focus mode + * until a non-root window is clicked, which is an interesting hybrid but not how I prefer it. */ + if(vwin != focused_desktop->focused_window && vwin->window != RootWindow(display, screen_num)) { + vwm_win_focus(vwin); + vwm_win_mru(vwin); + } + + XFlush(display); + XUngrabPointer(display, CurrentTime); + + return 1; + +_fail: + XUngrabPointer(display, CurrentTime); + + return 0; +} + + +/* Called in response to KeyRelease events, for now only interesting for detecting when Mod1 is released termintaing + * window cycling for application of MRU on the focused window */ +static void vwm_keyreleased(Window win, XEvent *keyrelease) +{ + vwm_window_t *vwin; + KeySym sym; + + switch((sym = XLookupKeysym(&keyrelease->xkey, 0))) { + case XK_Alt_R: + case XK_Alt_L: /* TODO: actually use the modifier mapping, for me XK_Alt_[LR] is Mod1. XGetModifierMapping()... */ + VWM_TRACE("XK_Alt_[LR] released"); + /* make the focused window the most recently used */ + if((vwin = vwm_win_focused())) { + vwm_win_mru(vwin); + } + + /* make the focused desktop the most recently used */ + if(focused_context == VWM_CONTEXT_FOCUS_DESKTOP && focused_desktop) { + vwm_desktop_mru(focused_desktop); + } + + if(key_is_grabbed) { + XUngrabKeyboard(display, CurrentTime); + XFlush(display); + key_is_grabbed = 0; + } + break; + + default: + VWM_TRACE("Unhandled keycode: %x", (unsigned int)sym); + break; + } +} + + +/* Called in response to KeyPress events, I currenly only grab Mod1 keypress events */ +static void vwm_keypressed(Window win, XEvent *keypress) +{ + vwm_window_t *vwin; + KeySym sym; + static KeySym last_sym; + static int repeat_cnt = 0; + int do_grab = 0; + + sym = XLookupKeysym(&keypress->xkey, 0); + + /* detect repeaters, note repeaters do not span interrupted Mod1 sequences! */ + if(key_is_grabbed && sym == last_sym) { + repeat_cnt++; + } else { + repeat_cnt = 0; + } + + switch(sym) { + +#define launcher(_sym, _argv...)\ + case _sym: \ + { \ + char *args[] = {_argv, NULL};\ + vwm_launch(args);\ + break; \ + } +#include "launchers.def" +#undef launcher + + case XK_grave: /* toggle shelf visibility */ + vwm_context_focus(VWM_CONTEXT_FOCUS_OTHER); + break; + + case XK_Tab: /* cycle focused window */ + do_grab = 1; /* grab the keyboard so we can respond to the Mod1 release */ + + /* focus the next window, note this doesn't affect MRU, that happens on Mod1 release */ + if((vwin = vwm_win_focused())) { + vwm_win_focus_next(vwin, focused_context); + } + break; + + case XK_space: /* cycle focused desktop utilizing MRU */ + do_grab = 1; /* grab the keyboard so we can respond to the Mod1 release for MRU updating */ + + /* XXX: note the sensitivity to the desktops_mru head here, we want to look past it. */ + vwm_desktop_focus(list_entry(focused_desktop->desktops_mru.next == &desktops_mru ? focused_desktop->desktops_mru.next->next : focused_desktop->desktops_mru.next, vwm_desktop_t, desktops_mru)); + break; + + case XK_d: /* destroy focused */ + if((vwin = vwm_win_focused())) { + if(keypress->xkey.state & ShiftMask) { /* brutally destroy the focused window */ + XKillClient(display, vwin->window); + } else { /* kindly destroy the focused window */ + vwm_win_message(vwin, wm_protocols_atom, wm_delete_atom); + } + } else if(focused_context == VWM_CONTEXT_FOCUS_DESKTOP) { + /* destroy the focused desktop when destroy occurs without any windows */ + vwm_desktop_destroy(focused_desktop); + } + break; + + case XK_Escape: /* leave VWM rudely */ + exit(42); + + case XK_v: /* instantiate (and focus) a new (potentially empty, unless migrating) virtual desktop */ + if(keypress->xkey.state & ShiftMask) { + if((vwin = vwm_win_focused())) { + /* migrate the focused window to a newly created virtual desktop, focusing the new desktop simultaneously */ + vwm_win_migrate(vwin, vwm_desktop_create(NULL)); + } + } else { + vwm_desktop_focus(vwm_desktop_create(NULL)); + vwm_desktop_mru(focused_desktop); + } + break; + + case XK_h: /* previous virtual desktop, if we're in the shelf context this will simply switch to desktop context */ + do_grab = 1; /* grab the keyboard so we can respond to the Mod1 release for MRU updating */ + + if(keypress->xkey.state & ShiftMask) { + if((vwin = vwm_win_focused()) && vwin->desktop->desktops.prev != &desktops) { + /* migrate the focused window with the desktop focus to the previous desktop */ + vwm_win_migrate(vwin, list_entry(vwin->desktop->desktops.prev, vwm_desktop_t, desktops)); + } + } else { + if(focused_context == VWM_CONTEXT_FOCUS_SHELF) { + /* focus the focused desktop instead of the shelf */ + vwm_context_focus(VWM_CONTEXT_FOCUS_DESKTOP); + } else if(focused_desktop->desktops.prev != &desktops) { + /* focus the previous desktop */ + vwm_desktop_focus(list_entry(focused_desktop->desktops.prev, vwm_desktop_t, desktops)); + } + } + break; + + case XK_l: /* next virtual desktop, if we're in the shelf context this will simply switch to desktop context */ + do_grab = 1; /* grab the keyboard so we can respond to the Mod1 release for MRU updating */ + + if(keypress->xkey.state & ShiftMask) { + if((vwin = vwm_win_focused()) && vwin->desktop->desktops.next != &desktops) { + /* migrate the focused window with the desktop focus to the next desktop */ + vwm_win_migrate(vwin, list_entry(vwin->desktop->desktops.next, vwm_desktop_t, desktops)); + } + } else { + if(focused_context == VWM_CONTEXT_FOCUS_SHELF) { + /* focus the focused desktop instead of the shelf */ + vwm_context_focus(VWM_CONTEXT_FOCUS_DESKTOP); + } else if(focused_desktop->desktops.next != &desktops) { + /* focus the next desktop */ + vwm_desktop_focus(list_entry(focused_desktop->desktops.next, vwm_desktop_t, desktops)); + } + } + break; + + case XK_k: /* raise or shelve the focused window */ + if((vwin = vwm_win_focused())) { + if(keypress->xkey.state & ShiftMask) { /* shelf the window and focus the shelf */ + if(focused_context != VWM_CONTEXT_FOCUS_SHELF) { + /* shelve the focused window while focusing the shelf */ + vwm_win_shelve(vwin); + vwm_context_focus(VWM_CONTEXT_FOCUS_SHELF); + } + } else { + do_grab = 1; + + XRaiseWindow(display, vwin->window); + + if(repeat_cnt == 1) { + /* double: reraise & fullscreen */ + vwm_win_fullscreen(vwin); + } else if(repeat_cnt == 2) { + /* triple: reraise & fullscreen w/borders obscured by screen perimiter */ + vwm_win_allscreen(vwin); + } + XFlush(display); + } + } + break; + + case XK_j: /* lower or unshelve the focused window */ + if((vwin = vwm_win_focused())) { + if(keypress->xkey.state & ShiftMask) { /* unshelf the window to the focused desktop, and focus the desktop */ + if(focused_context == VWM_CONTEXT_FOCUS_SHELF) { + /* unshelve the focused window, focus the desktop it went to */ + vwm_win_migrate(vwin, focused_desktop); + } + } else { + if(vwin->fullscreened == 2) { + vwm_win_fullscreen(vwin); + } else { + XLowerWindow(display, vwin->window); + } + XFlush(display); + } + } + break; + + case XK_Return: /* (full-screen / restore) focused window */ + if((vwin = vwm_win_focused())) { + if(vwin->fullscreened) { + vwm_win_restore(vwin); + } else { + vwm_win_fullscreen(vwin); + } + } + break; + + case XK_s: /* shelve focused window */ + if((vwin = vwm_win_focused()) && !vwin->shelved) { + vwm_win_shelve(vwin); + } + break; + + default: + VWM_TRACE("Unhandled keycode: %x", (unsigned int)sym); + break; + } + + /* if what we're doing requests a grab if not already grabbed, grab keyboard */ + if(!key_is_grabbed && do_grab) { + XGrabKeyboard(display, RootWindow(display, screen_num), False, GrabModeAsync, GrabModeAsync, CurrentTime); + key_is_grabbed = 1; + } + + /* remember the symbol for repeater detection */ + last_sym = sym; +} + + +static int errhandler(Display *display, XErrorEvent *err) +{ + /* TODO */ + return 1; +} + +int main(int argc, char *argv[]) +{ + int done = 0; + XEvent event; + Cursor pointer; + + /* open connection with the server */ + if((display = XOpenDisplay(NULL)) == NULL) { + VWM_ERROR("Cannot open display"); + return 1; + } + + /* prevent children from inheriting the X connection */ + if(fcntl(ConnectionNumber(display), F_SETFD, FD_CLOEXEC) < 0) { + VWM_ERROR("Cannot set FD_CLOEXEC on X connection"); + return 2; + } + + XSetErrorHandler(errhandler); + + screen_num = DefaultScreen(display); + + /* allocate colors, I make assumptions about the X server's color capabilities since I'll only use this on modern-ish computers... */ + cmap = DefaultColormap(display, screen_num); + +#define color(_sym, _str) \ + XAllocNamedColor(display, cmap, _str, &_sym ## _color, &_sym ## _color); +#include "colors.def" +#undef color + + wm_delete_atom = XInternAtom(display, "WM_DELETE_WINDOW", False); + wm_protocols_atom = XInternAtom(display, "WM_PROTOCOLS", False); + + XSelectInput(display, RootWindow(display, screen_num), SubstructureNotifyMask | SubstructureRedirectMask | PointerMotionMask | ButtonPressMask | ButtonReleaseMask); + XGrabKey(display, AnyKey, Mod1Mask, RootWindow(display, screen_num), False, GrabModeAsync, GrabModeAsync); + + XFlush(display); + + XSetInputFocus(display, RootWindow(display, screen_num), RevertToPointerRoot, CurrentTime); + + /* manage all preexisting windows */ + vwm_manage_existing(); + + /* create GC for logo drawing and window rubber-banding */ + gc = XCreateGC(display, RootWindow(display, screen_num), 0, NULL); + XSetSubwindowMode(display, gc, IncludeInferiors); + XSetFunction(display, gc, GXxor); + + /* first the logo color is the foreground */ + XSetForeground(display, gc, logo_color.pixel); + vwm_draw_logo(); + + /* change to the rubber-banding foreground color */ + XSetForeground(display, gc, rubberband_color.pixel); + + XClearWindow(display, RootWindow(display, screen_num)); + + /* set the pointer */ + pointer = XCreateFontCursor(display, XC_X_cursor); + XDefineCursor(display, RootWindow(display, screen_num), pointer); + + /* event loop */ + while (!done) { + XNextEvent(display, &event); + switch (event.type) { + case Expose: + VWM_TRACE("expose"); + break; + + case KeyPress: + VWM_TRACE("keypress"); + vwm_keypressed(event.xkey.window, &event); + break; + + case KeyRelease: + VWM_TRACE("keyrelease"); + vwm_keyreleased(event.xkey.window, &event); + break; + + case ButtonPress: + VWM_TRACE("buttonpresss"); + vwm_clicked(event.xbutton.window, &event); + break; + + case ButtonRelease: + VWM_TRACE("buttonrelease"); + break; + + case DestroyNotify: + VWM_TRACE("destroynotify"); + vwm_win_unmanage(event.xdestroywindow.window); + break; + + case CirculateNotify: + VWM_TRACE("circulatenotify"); + break; + + case ConfigureNotify: + VWM_TRACE("configurenotify"); + break; + + case UnmapNotify: + VWM_TRACE("unmapnotify"); + break; + + case CreateNotify: + VWM_TRACE("createnotify"); + vwm_win_manage(event.xcreatewindow.window, VWM_NOT_GRABBED); + break; + + case GravityNotify: + VWM_TRACE("gravitynotify"); + break; + + case MapNotify: + VWM_TRACE("mapnotify"); + break; + + case ReparentNotify: + VWM_TRACE("reparentnotify"); + break; + + case MotionNotify: + VWM_TRACE("motionnotify"); + break; + + case ConfigureRequest: { + XWindowChanges changes = { + .x = event.xconfigurerequest.x, /* TODO: for now I don't manipulate anything */ + .y = event.xconfigurerequest.y, + .width = event.xconfigurerequest.width, + .height = event.xconfigurerequest.height, + .border_width = WINDOW_BORDER_WIDTH /* except I do override whatever the border width may be */ + }; + + VWM_TRACE("configurerequest x=%i y=%i w=%i h=%i", changes.x, changes.y, changes.width, changes.height); + XConfigureWindow(display, event.xconfigurerequest.window, (event.xconfigurerequest.value_mask | CWBorderWidth), &changes); + break; + } + + case MapRequest: { + vwm_window_t *vwin; + + VWM_TRACE("maprequest"); + + vwin = vwm_win_lookup(event.xmap.window); + if(vwin && !vwin->mapped) { + int x = 0, y = 0; + XWindowAttributes attrs; + XWindowChanges changes; + + /* on initial mapping of a window we discover the coordinates and dimensions of the window */ + changes.x = x; + changes.y = y; + + vwin->mapped = 1; + XGetWMNormalHints(display, event.xmap.window, vwin->hints, &vwin->hints_supplied); + XGetWindowAttributes(display, event.xmap.window, &attrs); + + /* TODO: this is a good place to hook in a window placement algo */ + vwin->client.x = x; + vwin->client.y = y; + + vwin->client.height = attrs.height; + vwin->client.width = attrs.width; + + XConfigureWindow(display, event.xmap.window, (CWX | CWY), &changes); + } + + XMapWindow(display, event.xmap.window); + if(vwin->desktop->focused_window == vwin) { + XSync(display, False); + XSetInputFocus(display, vwin->window, RevertToPointerRoot, CurrentTime); + } + break; + } + + case MappingNotify: + VWM_TRACE("mapping notify"); + XRefreshKeyboardMapping(&event.xmapping); + break; + + default: + VWM_ERROR("Unhandled X op %i", event.type); + break; + } + } + + /* close connection to server */ + XFlush(display); + XCloseDisplay(display); + + return 0; +} |