208 lines
7.5 KiB
C
208 lines
7.5 KiB
C
#line 2 "scratchpad.c"
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/*
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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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* © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
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*
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* scratchpad.c: Moving windows to the scratchpad and making them visible again.
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*
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*/
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#include "all.h"
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/*
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* Moves the specified window to the __i3_scratch workspace, making it floating
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* and setting the appropriate scratchpad_state.
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*
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* Gets called upon the command 'move scratchpad'.
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*
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*/
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void scratchpad_move(Con *con) {
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if (con->type == CT_WORKSPACE) {
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LOG("'move scratchpad' used on a workspace \"%s\". Calling it "
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"recursively on all windows on this workspace.\n", con->name);
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Con *current;
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current = TAILQ_FIRST(&(con->focus_head));
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while (current) {
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Con *next = TAILQ_NEXT(current, focused);
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scratchpad_move(current);
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current = next;
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}
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return;
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}
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DLOG("should move con %p to __i3_scratch\n", con);
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Con *__i3_scratch = workspace_get("__i3_scratch", NULL);
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if (con_get_workspace(con) == __i3_scratch) {
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DLOG("This window is already on __i3_scratch.\n");
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return;
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}
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/* 1: Ensure the window is floating. From now on, we deal with the
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* CT_FLOATING_CON. We use automatic == false because the user made the
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* choice that this window should be a scratchpad (and floating). */
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floating_enable(con, false);
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con = con->parent;
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/* 2: Send the window to the __i3_scratch workspace, mainting its
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* coordinates and not warping the pointer. */
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Con *focus_next = con_next_focused(con);
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con_move_to_workspace(con, __i3_scratch, true, true);
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/* 3: If this is the first time this window is used as a scratchpad, we set
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* the scratchpad_state to SCRATCHPAD_FRESH. The window will then be
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* adjusted in size according to what the user specifies. */
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if (con->scratchpad_state == SCRATCHPAD_NONE) {
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DLOG("This window was never used as a scratchpad before.\n");
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con->scratchpad_state = SCRATCHPAD_FRESH;
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}
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/* 4: Fix focus. Normally, when moving a window to a different output, the
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* destination output gets focused. In this case, we don’t want that. */
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con_focus(focus_next);
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}
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/*
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* Either shows the top-most scratchpad window (con == NULL) or shows the
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* specified con (if it is scratchpad window).
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*
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* When called with con == NULL and the currently focused window is a
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* scratchpad window, this serves as a shortcut to hide it again (so the user
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* can press the same key to quickly look something up).
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*
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*/
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void scratchpad_show(Con *con) {
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DLOG("should show scratchpad window %p\n", con);
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Con *__i3_scratch = workspace_get("__i3_scratch", NULL);
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Con *floating;
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/* If this was 'scratchpad show' without criteria, we check if the
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* currently focused window is a scratchpad window and should be hidden
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* again. */
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if (!con &&
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(floating = con_inside_floating(focused)) &&
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floating->scratchpad_state != SCRATCHPAD_NONE) {
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DLOG("Focused window is a scratchpad window, hiding it.\n");
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scratchpad_move(focused);
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return;
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}
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/* If this was 'scratchpad show' with criteria, we check if it matches a
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* currently visible scratchpad window and hide it. */
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Con *active = con_get_workspace(focused);
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Con *current = con_get_workspace(con);
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if (con &&
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(floating = con_inside_floating(con)) &&
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floating->scratchpad_state != SCRATCHPAD_NONE &&
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current != __i3_scratch) {
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/* If scratchpad window is on the active workspace, then we should hide
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* it, otherwise we should move it to the active workspace. */
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if (current == active) {
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DLOG("Window is a scratchpad window, hiding it.\n");
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scratchpad_move(con);
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return;
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}
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}
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if (con == NULL) {
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/* Use the container on __i3_scratch which is highest in the focus
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* stack. When moving windows to __i3_scratch, they get inserted at the
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* bottom of the stack. */
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con = TAILQ_FIRST(&(__i3_scratch->floating_head));
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if (!con) {
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LOG("You don't have any scratchpad windows yet.\n");
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LOG("Use 'move scratchpad' to move a window to the scratchpad.\n");
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return;
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}
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}
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/* 1: Move the window from __i3_scratch to the current workspace. */
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con_move_to_workspace(con, active, true, false);
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/* 2: Adjust the size if this window was not adjusted yet. */
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if (con->scratchpad_state == SCRATCHPAD_FRESH) {
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DLOG("Adjusting size of this window.\n");
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Con *output = con_get_output(con);
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con->rect.width = output->rect.width * 0.5;
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con->rect.height = output->rect.height * 0.75;
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con->rect.x = output->rect.x +
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((output->rect.width / 2.0) - (con->rect.width / 2.0));
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con->rect.y = output->rect.y +
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((output->rect.height / 2.0) - (con->rect.height / 2.0));
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con->scratchpad_state = SCRATCHPAD_CHANGED;
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}
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/* Activate active workspace if window is from another workspace to ensure
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* proper focus. */
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if (current != active) {
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workspace_show(active);
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}
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con_focus(con_descend_focused(con));
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}
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/*
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* Greatest common divisor, implemented only for the least common multiple
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* below.
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*
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*/
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static int _gcd(const int m, const int n) {
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if (n == 0)
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return m;
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return _gcd(n, (m % n));
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}
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/*
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* Least common multiple. We use it to determine the (ideally not too large)
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* resolution for the __i3 pseudo-output on which the scratchpad is on (see
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* below). We could just multiply the resolutions, but for some pathetic cases
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* (many outputs), using the LCM will achieve better results.
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*
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* Man, when you were learning about these two algorithms for the first time,
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* did you think you’d ever need them in a real-world software project of
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* yours? I certainly didn’t until now. :-D
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*
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*/
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static int _lcm(const int m, const int n) {
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const int o = _gcd(m, n);
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return ((m * n) / o);
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}
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/*
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* When starting i3 initially (and after each change to the connected outputs),
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* this function fixes the resolution of the __i3 pseudo-output. When that
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* resolution is not set to a function which shares a common divisor with every
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* active output’s resolution, floating point calculation errors will lead to
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* the scratchpad window moving when shown repeatedly.
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*
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*/
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void scratchpad_fix_resolution(void) {
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Con *__i3_scratch = workspace_get("__i3_scratch", NULL);
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Con *__i3_output = con_get_output(__i3_scratch);
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DLOG("Current resolution: (%d, %d) %d x %d\n",
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__i3_output->rect.x, __i3_output->rect.y,
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__i3_output->rect.width, __i3_output->rect.height);
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Con *output;
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int new_width = -1,
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new_height = -1;
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TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
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if (output == __i3_output)
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continue;
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DLOG("output %s's resolution: (%d, %d) %d x %d\n",
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output->name, output->rect.x, output->rect.y,
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output->rect.width, output->rect.height);
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if (new_width == -1) {
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new_width = output->rect.width;
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new_height = output->rect.height;
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} else {
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new_width = _lcm(new_width, output->rect.width);
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new_height = _lcm(new_height, output->rect.height);
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}
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}
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DLOG("new width = %d, new height = %d\n",
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new_width, new_height);
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__i3_output->rect.width = new_width;
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__i3_output->rect.height = new_height;
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}
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