+/* src/client/wincontrol.c */
+
+#include "wincontrol.h"
+#include <ncurses.h> /* getmaxx(), getmaxy(), wresize() */
+#include <stddef.h> /* NULL */
+#include <stdint.h> /* uint8_t, uint32_t, UINT16_MAX */
+#include <stdio.h> /* sprintf() */
+#include <stdlib.h> /* free() */
+#include <string.h> /* memcpy(), memset(), strchr(), strlen() */
+#include "../common/rexit.h" /* exit_err() */
+#include "../common/try_malloc.h" /* try_malloc() */
+#include "../common/yx_uint16.h" /* struct yx_uint16 */
+#include "windows.h" /* struct Win, get_win_by_id(), get_win_pos_in_order() */
+#include "world.h" /* global world */
+
+
+
+/* Get Win before window identified by "c" or NULL if there is none. */
+static struct Win * get_win_before(char c);
+
+/* Make .v_screen just wide enough to contain all visible windows. */
+static void refit_v_screen();
+
+/* Update geometry (sizes, positions) of window "w" and its successors in the
+ * window chain. Use place_win() for the positioning algorithm.
+ */
+static void update_wins(struct Win * w);
+static void place_win(struct Win * w);
+
+/* Write "win"'s size back to .target_(height/width) as per .target_*_type. */
+static void set_win_target_size(struct Win * win);
+
+/* Append/suspend window "w" to/from chain of visible windows. Appended windows
+ * will become active. Suspended active windows will move the active window
+ * selection to their successor in the window chain or, failing that, their
+ * predecessor, or, failing that, to 0 (no window active).
+ */
+static void append_win(struct Win * w);
+static void suspend_win(struct Win * w);
+
+
+
+extern struct Win * get_win_before(char c)
+{
+ uint8_t i = get_win_pos_in_order(c);
+ if (i > 0)
+ {
+ return get_win_by_id(world.winDB.order[i - 1]);
+ }
+ return NULL;
+}
+
+
+
+static void refit_v_screen()
+{
+ /* Determine rightmost window column. */
+ uint32_t lastwcol = 0;
+ struct Win * wp = get_win_by_id(world.winDB.order[0]);
+ while (wp != 0)
+ {
+ if ((uint32_t) wp->start.x + (uint32_t) wp->frame_size.x > lastwcol + 1)
+ {
+ lastwcol = (uint32_t) wp->start.x + (uint32_t) wp->frame_size.x - 1;
+ }
+ wp = get_win_after(wp->id);
+ }
+
+ /* Only resize .v_screen if the rightmost window column has changed. */
+ char * err_s = "refit_v_screen() grows virtual screen beyond legal sizes.";
+ char * err_m = "refit_v_screen() triggers memory alloc error in wresize().";
+ if ((uint32_t) getmaxx(world.winDB.v_screen) + 1 != lastwcol)
+ {
+ uint8_t t = (lastwcol + 2 > UINT16_MAX);
+ exit_err(t, err_s);
+ t = wresize(world.winDB.v_screen, getmaxy(world.winDB.v_screen),
+ lastwcol + 2);
+ exit_err(t, err_m);
+ }
+}
+
+
+
+static void update_wins(struct Win * w)
+{
+ place_win(w);
+ refit_v_screen();
+ struct Win * next = get_win_after(w->id);
+ if (next)
+ {
+ update_wins(next);
+ }
+}
+
+
+
+static void place_win(struct Win * w)
+{
+ /* If w is first window, it goes into the top left corner. */
+ w->start.x = 0;
+ w->start.y = 1; /* Leave space for title bar. */
+ struct Win * w_prev = get_win_before(w->id);
+ if (w_prev)
+ {
+
+ /* If not, fit w's top left to top right of last top predecessor. */
+ struct Win * w_top = w_prev;
+ for (;
+ w_top->start.y != 1;
+ w_top = get_win_before(w_top->id));
+ w->start.x = w_top->start.x + w_top->frame_size.x + 1;
+
+ /* Fit w's top left to bottom left of its ->prev if enough space. */
+ uint16_t w_prev_maxy = w_prev->start.y + w_prev->frame_size.y;
+ if ( w->frame_size.x <= w_prev->frame_size.x
+ && w->frame_size.y < world.winDB.v_screen_size.y - w_prev_maxy)
+ {
+ w->start.x = w_prev->start.x;
+ w->start.y = w_prev_maxy + 1;
+ return;
+ }
+
+ /* Failing that, try to fit w' top left to the top right of the last
+ * predecessor w_test 1) not followed by windows with a left corner
+ * further rightwards than its own 2) with enough space rightwards for w
+ * until the bottom right of w_thr directly throning over it 3) and with
+ * this same space extending far enough to the bottom for fitting in w.
+ */
+ struct Win * w_test = w_prev;
+ struct Win * w_thr;
+ while (w_test != w_top)
+ {
+ for (w_thr = get_win_before(w_test->id);
+ w_test->start.y <= w_thr->start.y;
+ w_thr = get_win_before(w_thr->id));
+ uint16_t w_thr_bottom = w_thr->start.y + w_thr->frame_size.y;
+ uint16_t free_width = (w_thr->start.x + w_thr->frame_size.x)
+ - (w_test->start.x + w_test->frame_size.x);
+ if ( w->frame_size.y < world.winDB.v_screen_size.y - w_thr_bottom
+ && w->frame_size.x < free_width)
+ {
+ w->start.x = w_test->start.x + w_test->frame_size.x + 1;
+ w->start.y = w_thr_bottom + 1;
+ break;
+ }
+ w_test = w_thr;
+ }
+ }
+}
+
+
+
+static void set_win_target_size(struct Win * w)
+{
+ if (0 == w->target_height_type)
+ {
+ w->target_height = w->frame_size.y;
+ }
+ else if (1 == w->target_height_type)
+ {
+ w->target_height = w->frame_size.y - world.winDB.v_screen_size.y +1;
+ }
+ if (0 == w->target_width_type)
+ {
+ w->target_width = w->frame_size.x;
+ }
+ else if (1 == w->target_width_type)
+ {
+ w->target_width = w->frame_size.x - world.winDB.v_screen_size.x;
+ }
+}
+
+
+
+static void append_win(struct Win * w)
+{
+ char * f_name = "append_win()";
+ uint8_t old_size = strlen(world.winDB.order) + 1;
+ char * new_order = try_malloc(old_size + 1, f_name);
+ memcpy(new_order, world.winDB.order, old_size - 1);
+ new_order[old_size - 1] = w->id;
+ new_order[old_size] = '\0';
+ free(world.winDB.order);
+ world.winDB.order = new_order;
+ world.winDB.active = w->id;
+ update_wins(w);
+}
+
+
+
+static void suspend_win(struct Win * w)
+{
+ char * f_name = "suspend_win()";
+ uint8_t new_size = strlen(world.winDB.order);
+ char * new_order = try_malloc(new_size, f_name);
+ uint8_t i = get_win_pos_in_order(w->id);
+ char next_char = world.winDB.order[i + 1];
+ world.winDB.order[i] = '\0';
+ char * second_part = &world.winDB.order[i + 1];
+ sprintf(new_order, "%s%s", world.winDB.order, second_part);
+ free(world.winDB.order);
+ world.winDB.order = new_order;
+ world.winDB.active = world.winDB.order[i];
+ if (!world.winDB.order[i] && 0 < i)
+ {
+ world.winDB.active = world.winDB.order[i - 1];
+ }
+ if (world.winDB.order[i])
+ {
+ update_wins(get_win_by_id(next_char)); /* Already calls */
+ return; /* refit_v_screen(), so leave. */
+ }
+ refit_v_screen();
+}
+
+
+
+extern void toggle_window(char id)
+{
+ struct Win * win = get_win_by_id(id);
+ if (NULL == strchr(world.winDB.order, id))
+ {
+ append_win(win);
+ return;
+ }
+ suspend_win(win);
+}
+
+
+
+extern void toggle_winconfig()
+{
+ if (!world.winDB.active)
+ {
+ return;
+ }
+ struct Win * w = get_win_by_id(world.winDB.active);
+ if (0 == w->view)
+ {
+ w->view = 1;
+ w->target_center = w->center;
+ memset(&w->center, 0, sizeof(struct yx_uint16));
+ return;
+ }
+ else if (1 == w->view)
+ {
+ w->view = 2;
+ w->center.x = 0;
+ return;
+ }
+ w->view = 0;
+ w->center = w->target_center;
+}
+
+
+
+extern void toggle_win_size_type(char axis)
+{
+ struct Win * w = get_win_by_id(world.winDB.active);
+ if ('y' == axis)
+ {
+ w->target_height_type = (0 == w->target_height_type);
+ set_win_target_size(w);
+ return;
+ }
+ w->target_width_type = ( 0 == w->target_width_type
+ && w->frame_size.x <= world.winDB.v_screen_size.x);
+ set_win_target_size(w);
+}
+
+
+
+extern void toggle_linebreak_type()
+{
+ struct Win * w = get_win_by_id(world.winDB.active);
+ if (0 == w->linebreak)
+ {
+ w->linebreak = 1;
+ }
+ else if (1 == w->linebreak)
+ {
+ w->linebreak = 2;
+ }
+ else if (2 == w->linebreak)
+ {
+ w->linebreak = 0;
+ }
+}
+
+
+
+extern void resize_active_win(char change)
+{
+ if (world.winDB.active)
+ {
+ struct Win * w = get_win_by_id(world.winDB.active);
+ if (change == '-' && w->frame_size.y > 1)
+ {
+ w->frame_size.y--;
+ }
+ else if (change == '_' && w->frame_size.x > 1)
+ {
+ w->frame_size.x--;
+ }
+ else if ( change == '+'
+ && w->frame_size.y < world.winDB.v_screen_size.y - 1)
+ {
+ w->frame_size.y++;
+ }
+ else if (change == '*' && w->frame_size.y < UINT16_MAX)
+ {
+ w->frame_size.x++;
+ }
+ if ( 1 == w->target_width_type
+ && w->frame_size.x > world.winDB.v_screen_size.x)
+ {
+ w->target_width_type = 0;
+ }
+ set_win_target_size(w);
+ update_wins(w);
+ }
+}
+
+
+
+extern void shift_active_win(char dir)
+{
+ uint8_t len_order = strlen(world.winDB.order);
+ if (1 < len_order)
+ {
+ char tmp[len_order + 1];
+ tmp[len_order] = '\0';
+ uint8_t pos = get_win_pos_in_order(world.winDB.active);
+ if ('f' == dir)
+ {
+ if (pos == len_order - 1)
+ {
+ memcpy(tmp + 1, world.winDB.order, len_order - 1);
+ tmp[0] = world.winDB.active;
+ memcpy(world.winDB.order, tmp, len_order + 1);
+ }
+ else
+ {
+ world.winDB.order[pos] = world.winDB.order[pos + 1];
+ world.winDB.order[pos + 1] = world.winDB.active;
+ }
+ }
+ else
+ {
+ if (pos == 0)
+ {
+ memcpy(tmp, world.winDB.order + 1, len_order - 1);
+ tmp[len_order - 1] = world.winDB.active;
+ memcpy(world.winDB.order, tmp, len_order + 1);
+ }
+ else
+ {
+ world.winDB.order[pos] = world.winDB.order[pos - 1];
+ world.winDB.order[pos - 1] = world.winDB.active;
+ }
+ }
+ update_wins(get_win_by_id(world.winDB.order[0]));
+ }
+}
+
+
+
+extern void scroll_v_screen(char dir)
+{
+ if ( '+' == dir
+ && world.winDB.v_screen_offset + world.winDB.v_screen_size.x + 1
+ < getmaxx(world.winDB.v_screen))
+ {
+ world.winDB.v_screen_offset++;
+ }
+ else if ( '-' == dir
+ && world.winDB.v_screen_offset > 0)
+ {
+ world.winDB.v_screen_offset--;
+ }
+}
+
+
+
+extern void cycle_active_win(char dir)
+{
+ uint8_t len_order = strlen(world.winDB.order);
+ if (1 < len_order)
+ {
+ uint8_t pos = get_win_pos_in_order(world.winDB.active);
+ if ('f' == dir)
+ {
+ world.winDB.active = world.winDB.order[pos + 1];
+ if ('\0' == world.winDB.active)
+ {
+ world.winDB.active = world.winDB.order[0];
+ }
+ return;
+ }
+ if (pos > 0)
+ {
+ world.winDB.active = world.winDB.order[pos - 1];
+ return;
+ }
+ world.winDB.active = world.winDB.order[len_order - 1];
+ }
+}
projects / plomrogue / commitdiff