/* $OpenBSD: layout.c,v 1.51 2024/11/15 13:12:20 nicm Exp $ */ /* * Copyright (c) 2009 Nicholas Marriott * Copyright (c) 2016 Stephen Kent * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include "tmux.h" /* * The window layout is a tree of cells each of which can be one of: a * left-right container for a list of cells, a top-bottom container for a list * of cells, or a container for a window pane. * * Each window has a pointer to the root of its layout tree (containing its * panes), every pane has a pointer back to the cell containing it, and each * cell a pointer to its parent cell. */ static u_int layout_resize_check(struct window *, struct layout_cell *, enum layout_type); static int layout_resize_pane_grow(struct window *, struct layout_cell *, enum layout_type, int, int); static int layout_resize_pane_shrink(struct window *, struct layout_cell *, enum layout_type, int); static u_int layout_new_pane_size(struct window *, u_int, struct layout_cell *, enum layout_type, u_int, u_int, u_int); static int layout_set_size_check(struct window *, struct layout_cell *, enum layout_type, int); static void layout_resize_child_cells(struct window *, struct layout_cell *); struct layout_cell * layout_create_cell(struct layout_cell *lcparent) { struct layout_cell *lc; lc = xmalloc(sizeof *lc); lc->type = LAYOUT_WINDOWPANE; lc->parent = lcparent; TAILQ_INIT(&lc->cells); lc->sx = UINT_MAX; lc->sy = UINT_MAX; lc->xoff = UINT_MAX; lc->yoff = UINT_MAX; lc->wp = NULL; return (lc); } void layout_free_cell(struct layout_cell *lc) { struct layout_cell *lcchild; switch (lc->type) { case LAYOUT_LEFTRIGHT: case LAYOUT_TOPBOTTOM: while (!TAILQ_EMPTY(&lc->cells)) { lcchild = TAILQ_FIRST(&lc->cells); TAILQ_REMOVE(&lc->cells, lcchild, entry); layout_free_cell(lcchild); } break; case LAYOUT_WINDOWPANE: if (lc->wp != NULL) lc->wp->layout_cell = NULL; break; } free(lc); } void layout_print_cell(struct layout_cell *lc, const char *hdr, u_int n) { struct layout_cell *lcchild; const char *type; switch (lc->type) { case LAYOUT_LEFTRIGHT: type = "LEFTRIGHT"; break; case LAYOUT_TOPBOTTOM: type = "TOPBOTTOM"; break; case LAYOUT_WINDOWPANE: type = "WINDOWPANE"; break; default: type = "UNKNOWN"; break; } log_debug("%s:%*s%p type %s [parent %p] wp=%p [%u,%u %ux%u]", hdr, n, " ", lc, type, lc->parent, lc->wp, lc->xoff, lc->yoff, lc->sx, lc->sy); switch (lc->type) { case LAYOUT_LEFTRIGHT: case LAYOUT_TOPBOTTOM: TAILQ_FOREACH(lcchild, &lc->cells, entry) layout_print_cell(lcchild, hdr, n + 1); break; case LAYOUT_WINDOWPANE: break; } } struct layout_cell * layout_search_by_border(struct layout_cell *lc, u_int x, u_int y) { struct layout_cell *lcchild, *last = NULL; TAILQ_FOREACH(lcchild, &lc->cells, entry) { if (x >= lcchild->xoff && x < lcchild->xoff + lcchild->sx && y >= lcchild->yoff && y < lcchild->yoff + lcchild->sy) { /* Inside the cell - recurse. */ return (layout_search_by_border(lcchild, x, y)); } if (last == NULL) { last = lcchild; continue; } switch (lc->type) { case LAYOUT_LEFTRIGHT: if (x < lcchild->xoff && x >= last->xoff + last->sx) return (last); break; case LAYOUT_TOPBOTTOM: if (y < lcchild->yoff && y >= last->yoff + last->sy) return (last); break; case LAYOUT_WINDOWPANE: break; } last = lcchild; } return (NULL); } void layout_set_size(struct layout_cell *lc, u_int sx, u_int sy, u_int xoff, u_int yoff) { lc->sx = sx; lc->sy = sy; lc->xoff = xoff; lc->yoff = yoff; } void layout_make_leaf(struct layout_cell *lc, struct window_pane *wp) { lc->type = LAYOUT_WINDOWPANE; TAILQ_INIT(&lc->cells); wp->layout_cell = lc; lc->wp = wp; } void layout_make_node(struct layout_cell *lc, enum layout_type type) { if (type == LAYOUT_WINDOWPANE) fatalx("bad layout type"); lc->type = type; TAILQ_INIT(&lc->cells); if (lc->wp != NULL) lc->wp->layout_cell = NULL; lc->wp = NULL; } /* Fix cell offsets for a child cell. */ static void layout_fix_offsets1(struct layout_cell *lc) { struct layout_cell *lcchild; u_int xoff, yoff; if (lc->type == LAYOUT_LEFTRIGHT) { xoff = lc->xoff; TAILQ_FOREACH(lcchild, &lc->cells, entry) { lcchild->xoff = xoff; lcchild->yoff = lc->yoff; if (lcchild->type != LAYOUT_WINDOWPANE) layout_fix_offsets1(lcchild); xoff += lcchild->sx + 1; } } else { yoff = lc->yoff; TAILQ_FOREACH(lcchild, &lc->cells, entry) { lcchild->xoff = lc->xoff; lcchild->yoff = yoff; if (lcchild->type != LAYOUT_WINDOWPANE) layout_fix_offsets1(lcchild); yoff += lcchild->sy + 1; } } } /* Update cell offsets based on their sizes. */ void layout_fix_offsets(struct window *w) { struct layout_cell *lc = w->layout_root; lc->xoff = 0; lc->yoff = 0; layout_fix_offsets1(lc); } /* Is this a top cell? */ static int layout_cell_is_top(struct window *w, struct layout_cell *lc) { struct layout_cell *next; while (lc != w->layout_root) { next = lc->parent; if (next->type == LAYOUT_TOPBOTTOM && lc != TAILQ_FIRST(&next->cells)) return (0); lc = next; } return (1); } /* Is this a bottom cell? */ static int layout_cell_is_bottom(struct window *w, struct layout_cell *lc) { struct layout_cell *next; while (lc != w->layout_root) { next = lc->parent; if (next->type == LAYOUT_TOPBOTTOM && lc != TAILQ_LAST(&next->cells, layout_cells)) return (0); lc = next; } return (1); } /* * Returns 1 if we need to add an extra line for the pane status line. This is * the case for the most upper or lower panes only. */ static int layout_add_horizontal_border(struct window *w, struct layout_cell *lc, int status) { if (status == PANE_STATUS_TOP) return (layout_cell_is_top(w, lc)); if (status == PANE_STATUS_BOTTOM) return (layout_cell_is_bottom(w, lc)); return (0); } /* Update pane offsets and sizes based on their cells. */ void layout_fix_panes(struct window *w, struct window_pane *skip) { struct window_pane *wp; struct layout_cell *lc; int status, scrollbars, sb_pos, sb_w, sb_pad; u_int sx, sy; status = options_get_number(w->options, "pane-border-status"); scrollbars = options_get_number(w->options, "pane-scrollbars"); sb_pos = options_get_number(w->options, "pane-scrollbars-position"); TAILQ_FOREACH(wp, &w->panes, entry) { if ((lc = wp->layout_cell) == NULL || wp == skip) continue; wp->xoff = lc->xoff; wp->yoff = lc->yoff; sx = lc->sx; sy = lc->sy; if (layout_add_horizontal_border(w, lc, status)) { if (status == PANE_STATUS_TOP) wp->yoff++; sy--; } if (window_pane_show_scrollbar(wp, scrollbars)) { sb_w = wp->scrollbar_style.width; sb_pad = wp->scrollbar_style.pad; if (sb_w < 1) sb_w = 1; if (sb_pad < 0) sb_pad = 0; if (sb_pos == PANE_SCROLLBARS_LEFT) { if ((int)sx - sb_w < PANE_MINIMUM) { wp->xoff = wp->xoff + (int)sx - PANE_MINIMUM; sx = PANE_MINIMUM; } else { sx = sx - sb_w - sb_pad; wp->xoff = wp->xoff + sb_w + sb_pad; } } else /* sb_pos == PANE_SCROLLBARS_RIGHT */ if ((int)sx - sb_w - sb_pad < PANE_MINIMUM) sx = PANE_MINIMUM; else sx = sx - sb_w - sb_pad; wp->flags |= PANE_REDRAWSCROLLBAR; } window_pane_resize(wp, sx, sy); } } /* Count the number of available cells in a layout. */ u_int layout_count_cells(struct layout_cell *lc) { struct layout_cell *lcchild; u_int count; switch (lc->type) { case LAYOUT_WINDOWPANE: return (1); case LAYOUT_LEFTRIGHT: case LAYOUT_TOPBOTTOM: count = 0; TAILQ_FOREACH(lcchild, &lc->cells, entry) count += layout_count_cells(lcchild); return (count); default: fatalx("bad layout type"); } } /* Calculate how much size is available to be removed from a cell. */ static u_int layout_resize_check(struct window *w, struct layout_cell *lc, enum layout_type type) { struct layout_cell *lcchild; struct style *sb_style = &w->active->scrollbar_style; u_int available, minimum; int status, scrollbars; status = options_get_number(w->options, "pane-border-status"); scrollbars = options_get_number(w->options, "pane-scrollbars"); if (lc->type == LAYOUT_WINDOWPANE) { /* Space available in this cell only. */ if (type == LAYOUT_LEFTRIGHT) { available = lc->sx; if (scrollbars) minimum = PANE_MINIMUM + sb_style->width + sb_style->pad; else minimum = PANE_MINIMUM; } else { available = lc->sy; if (layout_add_horizontal_border(w, lc, status)) minimum = PANE_MINIMUM + 1; else minimum = PANE_MINIMUM; } if (available > minimum) available -= minimum; else available = 0; } else if (lc->type == type) { /* Same type: total of available space in all child cells. */ available = 0; TAILQ_FOREACH(lcchild, &lc->cells, entry) available += layout_resize_check(w, lcchild, type); } else { /* Different type: minimum of available space in child cells. */ minimum = UINT_MAX; TAILQ_FOREACH(lcchild, &lc->cells, entry) { available = layout_resize_check(w, lcchild, type); if (available < minimum) minimum = available; } available = minimum; } return (available); } /* * Adjust cell size evenly, including altering its children. This function * expects the change to have already been bounded to the space available. */ void layout_resize_adjust(struct window *w, struct layout_cell *lc, enum layout_type type, int change) { struct layout_cell *lcchild; /* Adjust the cell size. */ if (type == LAYOUT_LEFTRIGHT) lc->sx += change; else lc->sy += change; /* If this is a leaf cell, that is all that is necessary. */ if (type == LAYOUT_WINDOWPANE) return; /* Child cell runs in a different direction. */ if (lc->type != type) { TAILQ_FOREACH(lcchild, &lc->cells, entry) layout_resize_adjust(w, lcchild, type, change); return; } /* * Child cell runs in the same direction. Adjust each child equally * until no further change is possible. */ while (change != 0) { TAILQ_FOREACH(lcchild, &lc->cells, entry) { if (change == 0) break; if (change > 0) { layout_resize_adjust(w, lcchild, type, 1); change--; continue; } if (layout_resize_check(w, lcchild, type) > 0) { layout_resize_adjust(w, lcchild, type, -1); change++; } } } } /* Destroy a cell and redistribute the space. */ void layout_destroy_cell(struct window *w, struct layout_cell *lc, struct layout_cell **lcroot) { struct layout_cell *lcother, *lcparent; /* * If no parent, this is the last pane so window close is imminent and * there is no need to resize anything. */ lcparent = lc->parent; if (lcparent == NULL) { layout_free_cell(lc); *lcroot = NULL; return; } /* Merge the space into the previous or next cell. */ if (lc == TAILQ_FIRST(&lcparent->cells)) lcother = TAILQ_NEXT(lc, entry); else lcother = TAILQ_PREV(lc, layout_cells, entry); if (lcother != NULL && lcparent->type == LAYOUT_LEFTRIGHT) layout_resize_adjust(w, lcother, lcparent->type, lc->sx + 1); else if (lcother != NULL) layout_resize_adjust(w, lcother, lcparent->type, lc->sy + 1); /* Remove this from the parent's list. */ TAILQ_REMOVE(&lcparent->cells, lc, entry); layout_free_cell(lc); /* * If the parent now has one cell, remove the parent from the tree and * replace it by that cell. */ lc = TAILQ_FIRST(&lcparent->cells); if (TAILQ_NEXT(lc, entry) == NULL) { TAILQ_REMOVE(&lcparent->cells, lc, entry); lc->parent = lcparent->parent; if (lc->parent == NULL) { lc->xoff = 0; lc->yoff = 0; *lcroot = lc; } else TAILQ_REPLACE(&lc->parent->cells, lcparent, lc, entry); layout_free_cell(lcparent); } } void layout_init(struct window *w, struct window_pane *wp) { struct layout_cell *lc; lc = w->layout_root = layout_create_cell(NULL); layout_set_size(lc, w->sx, w->sy, 0, 0); layout_make_leaf(lc, wp); layout_fix_panes(w, NULL); } void layout_free(struct window *w) { layout_free_cell(w->layout_root); } /* Resize the entire layout after window resize. */ void layout_resize(struct window *w, u_int sx, u_int sy) { struct layout_cell *lc = w->layout_root; int xlimit, ylimit, xchange, ychange; /* * Adjust horizontally. Do not attempt to reduce the layout lower than * the minimum (more than the amount returned by layout_resize_check). * * This can mean that the window size is smaller than the total layout * size: redrawing this is handled at a higher level, but it does leave * a problem with growing the window size here: if the current size is * < the minimum, growing proportionately by adding to each pane is * wrong as it would keep the layout size larger than the window size. * Instead, spread the difference between the minimum and the new size * out proportionately - this should leave the layout fitting the new * window size. */ xchange = sx - lc->sx; xlimit = layout_resize_check(w, lc, LAYOUT_LEFTRIGHT); if (xchange < 0 && xchange < -xlimit) xchange = -xlimit; if (xlimit == 0) { if (sx <= lc->sx) /* lc->sx is minimum possible */ xchange = 0; else xchange = sx - lc->sx; } if (xchange != 0) layout_resize_adjust(w, lc, LAYOUT_LEFTRIGHT, xchange); /* Adjust vertically in a similar fashion. */ ychange = sy - lc->sy; ylimit = layout_resize_check(w, lc, LAYOUT_TOPBOTTOM); if (ychange < 0 && ychange < -ylimit) ychange = -ylimit; if (ylimit == 0) { if (sy <= lc->sy) /* lc->sy is minimum possible */ ychange = 0; else ychange = sy - lc->sy; } if (ychange != 0) layout_resize_adjust(w, lc, LAYOUT_TOPBOTTOM, ychange); /* Fix cell offsets. */ layout_fix_offsets(w); layout_fix_panes(w, NULL); } /* Resize a pane to an absolute size. */ void layout_resize_pane_to(struct window_pane *wp, enum layout_type type, u_int new_size) { struct layout_cell *lc, *lcparent; int change, size; lc = wp->layout_cell; /* Find next parent of the same type. */ lcparent = lc->parent; while (lcparent != NULL && lcparent->type != type) { lc = lcparent; lcparent = lc->parent; } if (lcparent == NULL) return; /* Work out the size adjustment. */ if (type == LAYOUT_LEFTRIGHT) size = lc->sx; else size = lc->sy; if (lc == TAILQ_LAST(&lcparent->cells, layout_cells)) change = size - new_size; else change = new_size - size; /* Resize the pane. */ layout_resize_pane(wp, type, change, 1); } void layout_resize_layout(struct window *w, struct layout_cell *lc, enum layout_type type, int change, int opposite) { int needed, size; /* Grow or shrink the cell. */ needed = change; while (needed != 0) { if (change > 0) { size = layout_resize_pane_grow(w, lc, type, needed, opposite); needed -= size; } else { size = layout_resize_pane_shrink(w, lc, type, needed); needed += size; } if (size == 0) /* no more change possible */ break; } /* Fix cell offsets. */ layout_fix_offsets(w); layout_fix_panes(w, NULL); notify_window("window-layout-changed", w); } /* Resize a single pane within the layout. */ void layout_resize_pane(struct window_pane *wp, enum layout_type type, int change, int opposite) { struct layout_cell *lc, *lcparent; lc = wp->layout_cell; /* Find next parent of the same type. */ lcparent = lc->parent; while (lcparent != NULL && lcparent->type != type) { lc = lcparent; lcparent = lc->parent; } if (lcparent == NULL) return; /* If this is the last cell, move back one. */ if (lc == TAILQ_LAST(&lcparent->cells, layout_cells)) lc = TAILQ_PREV(lc, layout_cells, entry); layout_resize_layout(wp->window, lc, type, change, opposite); } /* Helper function to grow pane. */ static int layout_resize_pane_grow(struct window *w, struct layout_cell *lc, enum layout_type type, int needed, int opposite) { struct layout_cell *lcadd, *lcremove; u_int size = 0; /* Growing. Always add to the current cell. */ lcadd = lc; /* Look towards the tail for a suitable cell for reduction. */ lcremove = TAILQ_NEXT(lc, entry); while (lcremove != NULL) { size = layout_resize_check(w, lcremove, type); if (size > 0) break; lcremove = TAILQ_NEXT(lcremove, entry); } /* If none found, look towards the head. */ if (opposite && lcremove == NULL) { lcremove = TAILQ_PREV(lc, layout_cells, entry); while (lcremove != NULL) { size = layout_resize_check(w, lcremove, type); if (size > 0) break; lcremove = TAILQ_PREV(lcremove, layout_cells, entry); } } if (lcremove == NULL) return (0); /* Change the cells. */ if (size > (u_int) needed) size = needed; layout_resize_adjust(w, lcadd, type, size); layout_resize_adjust(w, lcremove, type, -size); return (size); } /* Helper function to shrink pane. */ static int layout_resize_pane_shrink(struct window *w, struct layout_cell *lc, enum layout_type type, int needed) { struct layout_cell *lcadd, *lcremove; u_int size; /* Shrinking. Find cell to remove from by walking towards head. */ lcremove = lc; do { size = layout_resize_check(w, lcremove, type); if (size != 0) break; lcremove = TAILQ_PREV(lcremove, layout_cells, entry); } while (lcremove != NULL); if (lcremove == NULL) return (0); /* And add onto the next cell (from the original cell). */ lcadd = TAILQ_NEXT(lc, entry); if (lcadd == NULL) return (0); /* Change the cells. */ if (size > (u_int) -needed) size = -needed; layout_resize_adjust(w, lcadd, type, size); layout_resize_adjust(w, lcremove, type, -size); return (size); } /* Assign window pane to newly split cell. */ void layout_assign_pane(struct layout_cell *lc, struct window_pane *wp, int do_not_resize) { layout_make_leaf(lc, wp); if (do_not_resize) layout_fix_panes(wp->window, wp); else layout_fix_panes(wp->window, NULL); } /* Calculate the new pane size for resized parent. */ static u_int layout_new_pane_size(struct window *w, u_int previous, struct layout_cell *lc, enum layout_type type, u_int size, u_int count_left, u_int size_left) { u_int new_size, min, max, available; /* If this is the last cell, it can take all of the remaining size. */ if (count_left == 1) return (size_left); /* How much is available in this parent? */ available = layout_resize_check(w, lc, type); /* * Work out the minimum size of this cell and the new size * proportionate to the previous size. */ min = (PANE_MINIMUM + 1) * (count_left - 1); if (type == LAYOUT_LEFTRIGHT) { if (lc->sx - available > min) min = lc->sx - available; new_size = (lc->sx * size) / previous; } else { if (lc->sy - available > min) min = lc->sy - available; new_size = (lc->sy * size) / previous; } /* Check against the maximum and minimum size. */ max = size_left - min; if (new_size > max) new_size = max; if (new_size < PANE_MINIMUM) new_size = PANE_MINIMUM; return (new_size); } /* Check if the cell and all its children can be resized to a specific size. */ static int layout_set_size_check(struct window *w, struct layout_cell *lc, enum layout_type type, int size) { struct layout_cell *lcchild; u_int new_size, available, previous, count, idx; /* Cells with no children must just be bigger than minimum. */ if (lc->type == LAYOUT_WINDOWPANE) return (size >= PANE_MINIMUM); available = size; /* Count number of children. */ count = 0; TAILQ_FOREACH(lcchild, &lc->cells, entry) count++; /* Check new size will work for each child. */ if (lc->type == type) { if (available < (count * 2) - 1) return (0); if (type == LAYOUT_LEFTRIGHT) previous = lc->sx; else previous = lc->sy; idx = 0; TAILQ_FOREACH(lcchild, &lc->cells, entry) { new_size = layout_new_pane_size(w, previous, lcchild, type, size, count - idx, available); if (idx == count - 1) { if (new_size > available) return (0); available -= new_size; } else { if (new_size + 1 > available) return (0); available -= new_size + 1; } if (!layout_set_size_check(w, lcchild, type, new_size)) return (0); idx++; } } else { TAILQ_FOREACH(lcchild, &lc->cells, entry) { if (lcchild->type == LAYOUT_WINDOWPANE) continue; if (!layout_set_size_check(w, lcchild, type, size)) return (0); } } return (1); } /* Resize all child cells to fit within the current cell. */ static void layout_resize_child_cells(struct window *w, struct layout_cell *lc) { struct layout_cell *lcchild; u_int previous, available, count, idx; if (lc->type == LAYOUT_WINDOWPANE) return; /* What is the current size used? */ count = 0; previous = 0; TAILQ_FOREACH(lcchild, &lc->cells, entry) { count++; if (lc->type == LAYOUT_LEFTRIGHT) previous += lcchild->sx; else if (lc->type == LAYOUT_TOPBOTTOM) previous += lcchild->sy; } previous += (count - 1); /* And how much is available? */ available = 0; if (lc->type == LAYOUT_LEFTRIGHT) available = lc->sx; else if (lc->type == LAYOUT_TOPBOTTOM) available = lc->sy; /* Resize children into the new size. */ idx = 0; TAILQ_FOREACH(lcchild, &lc->cells, entry) { if (lc->type == LAYOUT_TOPBOTTOM) { lcchild->sx = lc->sx; lcchild->xoff = lc->xoff; } else { lcchild->sx = layout_new_pane_size(w, previous, lcchild, lc->type, lc->sx, count - idx, available); available -= (lcchild->sx + 1); } if (lc->type == LAYOUT_LEFTRIGHT) lcchild->sy = lc->sy; else { lcchild->sy = layout_new_pane_size(w, previous, lcchild, lc->type, lc->sy, count - idx, available); available -= (lcchild->sy + 1); } layout_resize_child_cells(w, lcchild); idx++; } } /* * Split a pane into two. size is a hint, or -1 for default half/half * split. This must be followed by layout_assign_pane before much else happens! */ struct layout_cell * layout_split_pane(struct window_pane *wp, enum layout_type type, int size, int flags) { struct layout_cell *lc, *lcparent, *lcnew, *lc1, *lc2; struct style *sb_style = &wp->scrollbar_style; u_int sx, sy, xoff, yoff, size1, size2, minimum; u_int new_size, saved_size, resize_first = 0; int full_size = (flags & SPAWN_FULLSIZE), status; int scrollbars; /* * If full_size is specified, add a new cell at the top of the window * layout. Otherwise, split the cell for the current pane. */ if (full_size) lc = wp->window->layout_root; else lc = wp->layout_cell; status = options_get_number(wp->window->options, "pane-border-status"); scrollbars = options_get_number(wp->window->options, "pane-scrollbars"); /* Copy the old cell size. */ sx = lc->sx; sy = lc->sy; xoff = lc->xoff; yoff = lc->yoff; /* Check there is enough space for the two new panes. */ switch (type) { case LAYOUT_LEFTRIGHT: if (scrollbars) { minimum = PANE_MINIMUM * 2 + sb_style->width + sb_style->pad; } else minimum = PANE_MINIMUM * 2 + 1; if (sx < minimum) return (NULL); break; case LAYOUT_TOPBOTTOM: if (layout_add_horizontal_border(wp->window, lc, status)) minimum = PANE_MINIMUM * 2 + 2; else minimum = PANE_MINIMUM * 2 + 1; if (sy < minimum) return (NULL); break; default: fatalx("bad layout type"); } /* * Calculate new cell sizes. size is the target size or -1 for middle * split, size1 is the size of the top/left and size2 the bottom/right. */ if (type == LAYOUT_LEFTRIGHT) saved_size = sx; else saved_size = sy; if (size < 0) size2 = ((saved_size + 1) / 2) - 1; else if (flags & SPAWN_BEFORE) size2 = saved_size - size - 1; else size2 = size; if (size2 < PANE_MINIMUM) size2 = PANE_MINIMUM; else if (size2 > saved_size - 2) size2 = saved_size - 2; size1 = saved_size - 1 - size2; /* Which size are we using? */ if (flags & SPAWN_BEFORE) new_size = size2; else new_size = size1; /* Confirm there is enough space for full size pane. */ if (full_size && !layout_set_size_check(wp->window, lc, type, new_size)) return (NULL); if (lc->parent != NULL && lc->parent->type == type) { /* * If the parent exists and is of the same type as the split, * create a new cell and insert it after this one. */ lcparent = lc->parent; lcnew = layout_create_cell(lcparent); if (flags & SPAWN_BEFORE) TAILQ_INSERT_BEFORE(lc, lcnew, entry); else TAILQ_INSERT_AFTER(&lcparent->cells, lc, lcnew, entry); } else if (full_size && lc->parent == NULL && lc->type == type) { /* * If the new full size pane is the same type as the root * split, insert the new pane under the existing root cell * instead of creating a new root cell. The existing layout * must be resized before inserting the new cell. */ if (lc->type == LAYOUT_LEFTRIGHT) { lc->sx = new_size; layout_resize_child_cells(wp->window, lc); lc->sx = saved_size; } else if (lc->type == LAYOUT_TOPBOTTOM) { lc->sy = new_size; layout_resize_child_cells(wp->window, lc); lc->sy = saved_size; } resize_first = 1; /* Create the new cell. */ lcnew = layout_create_cell(lc); size = saved_size - 1 - new_size; if (lc->type == LAYOUT_LEFTRIGHT) layout_set_size(lcnew, size, sy, 0, 0); else if (lc->type == LAYOUT_TOPBOTTOM) layout_set_size(lcnew, sx, size, 0, 0); if (flags & SPAWN_BEFORE) TAILQ_INSERT_HEAD(&lc->cells, lcnew, entry); else TAILQ_INSERT_TAIL(&lc->cells, lcnew, entry); } else { /* * Otherwise create a new parent and insert it. */ /* Create and insert the replacement parent. */ lcparent = layout_create_cell(lc->parent); layout_make_node(lcparent, type); layout_set_size(lcparent, sx, sy, xoff, yoff); if (lc->parent == NULL) wp->window->layout_root = lcparent; else TAILQ_REPLACE(&lc->parent->cells, lc, lcparent, entry); /* Insert the old cell. */ lc->parent = lcparent; TAILQ_INSERT_HEAD(&lcparent->cells, lc, entry); /* Create the new child cell. */ lcnew = layout_create_cell(lcparent); if (flags & SPAWN_BEFORE) TAILQ_INSERT_HEAD(&lcparent->cells, lcnew, entry); else TAILQ_INSERT_TAIL(&lcparent->cells, lcnew, entry); } if (flags & SPAWN_BEFORE) { lc1 = lcnew; lc2 = lc; } else { lc1 = lc; lc2 = lcnew; } /* * Set new cell sizes. size1 is the size of the top/left and size2 the * bottom/right. */ if (!resize_first && type == LAYOUT_LEFTRIGHT) { layout_set_size(lc1, size1, sy, xoff, yoff); layout_set_size(lc2, size2, sy, xoff + lc1->sx + 1, yoff); } else if (!resize_first && type == LAYOUT_TOPBOTTOM) { layout_set_size(lc1, sx, size1, xoff, yoff); layout_set_size(lc2, sx, size2, xoff, yoff + lc1->sy + 1); } if (full_size) { if (!resize_first) layout_resize_child_cells(wp->window, lc); layout_fix_offsets(wp->window); } else layout_make_leaf(lc, wp); return (lcnew); } /* Destroy the cell associated with a pane. */ void layout_close_pane(struct window_pane *wp) { struct window *w = wp->window; /* Remove the cell. */ layout_destroy_cell(w, wp->layout_cell, &w->layout_root); /* Fix pane offsets and sizes. */ if (w->layout_root != NULL) { layout_fix_offsets(w); layout_fix_panes(w, NULL); } notify_window("window-layout-changed", w); } int layout_spread_cell(struct window *w, struct layout_cell *parent) { struct layout_cell *lc; struct style *sb_style = &w->active->scrollbar_style; u_int number, each, size, this; int change, changed, status, scrollbars; number = 0; TAILQ_FOREACH (lc, &parent->cells, entry) number++; if (number <= 1) return (0); status = options_get_number(w->options, "pane-border-status"); scrollbars = options_get_number(w->options, "pane-scrollbars"); if (parent->type == LAYOUT_LEFTRIGHT) { if (scrollbars) size = parent->sx - sb_style->width + sb_style->pad; else size = parent->sx; } else if (parent->type == LAYOUT_TOPBOTTOM) { if (layout_add_horizontal_border(w, parent, status)) size = parent->sy - 1; else size = parent->sy; } else return (0); if (size < number - 1) return (0); each = (size - (number - 1)) / number; if (each == 0) return (0); changed = 0; TAILQ_FOREACH (lc, &parent->cells, entry) { if (TAILQ_NEXT(lc, entry) == NULL) each = size - ((each + 1) * (number - 1)); change = 0; if (parent->type == LAYOUT_LEFTRIGHT) { change = each - (int)lc->sx; layout_resize_adjust(w, lc, LAYOUT_LEFTRIGHT, change); } else if (parent->type == LAYOUT_TOPBOTTOM) { if (layout_add_horizontal_border(w, lc, status)) this = each + 1; else this = each; change = this - (int)lc->sy; layout_resize_adjust(w, lc, LAYOUT_TOPBOTTOM, change); } if (change != 0) changed = 1; } return (changed); } void layout_spread_out(struct window_pane *wp) { struct layout_cell *parent; struct window *w = wp->window; parent = wp->layout_cell->parent; if (parent == NULL) return; do { if (layout_spread_cell(w, parent)) { layout_fix_offsets(w); layout_fix_panes(w, NULL); break; } } while ((parent = parent->parent) != NULL); }