1 /* $OpenBSD: grid-view.c,v 1.28 2017/02/16 12:43:08 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/types.h> 20 21 #include <string.h> 22 23 #include "tmux.h" 24 25 /* 26 * Grid view functions. These work using coordinates relative to the visible 27 * screen area. 28 */ 29 30 #define grid_view_x(gd, x) (x) 31 #define grid_view_y(gd, y) ((gd)->hsize + (y)) 32 33 /* Get cell. */ 34 void 35 grid_view_get_cell(struct grid *gd, u_int px, u_int py, struct grid_cell *gc) 36 { 37 grid_get_cell(gd, grid_view_x(gd, px), grid_view_y(gd, py), gc); 38 } 39 40 /* Set cell. */ 41 void 42 grid_view_set_cell(struct grid *gd, u_int px, u_int py, 43 const struct grid_cell *gc) 44 { 45 grid_set_cell(gd, grid_view_x(gd, px), grid_view_y(gd, py), gc); 46 } 47 48 /* Set cells. */ 49 void 50 grid_view_set_cells(struct grid *gd, u_int px, u_int py, 51 const struct grid_cell *gc, const char *s, size_t slen) 52 { 53 grid_set_cells(gd, grid_view_x(gd, px), grid_view_y(gd, py), gc, s, 54 slen); 55 } 56 57 /* Clear into history. */ 58 void 59 grid_view_clear_history(struct grid *gd, u_int bg) 60 { 61 struct grid_line *gl; 62 u_int yy, last; 63 64 /* Find the last used line. */ 65 last = 0; 66 for (yy = 0; yy < gd->sy; yy++) { 67 gl = &gd->linedata[grid_view_y(gd, yy)]; 68 if (gl->cellused != 0) 69 last = yy + 1; 70 } 71 if (last == 0) { 72 grid_view_clear(gd, 0, 0, gd->sx, gd->sy, bg); 73 return; 74 } 75 76 /* Scroll the lines into the history. */ 77 for (yy = 0; yy < last; yy++) { 78 grid_collect_history(gd, bg); 79 grid_scroll_history(gd, bg); 80 } 81 if (last < gd->sy) 82 grid_view_clear(gd, 0, 0, gd->sx, gd->sy - last, bg); 83 gd->hscrolled = 0; 84 } 85 86 /* Clear area. */ 87 void 88 grid_view_clear(struct grid *gd, u_int px, u_int py, u_int nx, u_int ny, 89 u_int bg) 90 { 91 px = grid_view_x(gd, px); 92 py = grid_view_y(gd, py); 93 94 grid_clear(gd, px, py, nx, ny, bg); 95 } 96 97 /* Scroll region up. */ 98 void 99 grid_view_scroll_region_up(struct grid *gd, u_int rupper, u_int rlower) 100 { 101 if (gd->flags & GRID_HISTORY) { 102 grid_collect_history(gd, 8); 103 if (rupper == 0 && rlower == gd->sy - 1) 104 grid_scroll_history(gd, 8); 105 else { 106 rupper = grid_view_y(gd, rupper); 107 rlower = grid_view_y(gd, rlower); 108 grid_scroll_history_region(gd, rupper, rlower); 109 } 110 } else { 111 rupper = grid_view_y(gd, rupper); 112 rlower = grid_view_y(gd, rlower); 113 grid_move_lines(gd, rupper, rupper + 1, rlower - rupper, 8); 114 } 115 } 116 117 /* Scroll region down. */ 118 void 119 grid_view_scroll_region_down(struct grid *gd, u_int rupper, u_int rlower) 120 { 121 rupper = grid_view_y(gd, rupper); 122 rlower = grid_view_y(gd, rlower); 123 124 grid_move_lines(gd, rupper + 1, rupper, rlower - rupper, 8); 125 } 126 127 /* Insert lines. */ 128 void 129 grid_view_insert_lines(struct grid *gd, u_int py, u_int ny, u_int bg) 130 { 131 u_int sy; 132 133 py = grid_view_y(gd, py); 134 135 sy = grid_view_y(gd, gd->sy); 136 137 grid_move_lines(gd, py + ny, py, sy - py - ny, bg); 138 } 139 140 /* Insert lines in region. */ 141 void 142 grid_view_insert_lines_region(struct grid *gd, u_int rlower, u_int py, 143 u_int ny, u_int bg) 144 { 145 u_int ny2; 146 147 rlower = grid_view_y(gd, rlower); 148 149 py = grid_view_y(gd, py); 150 151 ny2 = rlower + 1 - py - ny; 152 grid_move_lines(gd, rlower + 1 - ny2, py, ny2, bg); 153 grid_clear(gd, 0, py + ny2, gd->sx, ny - ny2, bg); 154 } 155 156 /* Delete lines. */ 157 void 158 grid_view_delete_lines(struct grid *gd, u_int py, u_int ny, u_int bg) 159 { 160 u_int sy; 161 162 py = grid_view_y(gd, py); 163 164 sy = grid_view_y(gd, gd->sy); 165 166 grid_move_lines(gd, py, py + ny, sy - py - ny, bg); 167 grid_clear(gd, 0, sy - ny, gd->sx, py + ny - (sy - ny), bg); 168 } 169 170 /* Delete lines inside scroll region. */ 171 void 172 grid_view_delete_lines_region(struct grid *gd, u_int rlower, u_int py, 173 u_int ny, u_int bg) 174 { 175 u_int ny2; 176 177 rlower = grid_view_y(gd, rlower); 178 179 py = grid_view_y(gd, py); 180 181 ny2 = rlower + 1 - py - ny; 182 grid_move_lines(gd, py, py + ny, ny2, bg); 183 grid_clear(gd, 0, py + ny2, gd->sx, ny - ny2, bg); 184 } 185 186 /* Insert characters. */ 187 void 188 grid_view_insert_cells(struct grid *gd, u_int px, u_int py, u_int nx, u_int bg) 189 { 190 u_int sx; 191 192 px = grid_view_x(gd, px); 193 py = grid_view_y(gd, py); 194 195 sx = grid_view_x(gd, gd->sx); 196 197 if (px >= sx - 1) 198 grid_clear(gd, px, py, 1, 1, bg); 199 else 200 grid_move_cells(gd, px + nx, px, py, sx - px - nx, bg); 201 } 202 203 /* Delete characters. */ 204 void 205 grid_view_delete_cells(struct grid *gd, u_int px, u_int py, u_int nx, u_int bg) 206 { 207 u_int sx; 208 209 px = grid_view_x(gd, px); 210 py = grid_view_y(gd, py); 211 212 sx = grid_view_x(gd, gd->sx); 213 214 grid_move_cells(gd, px, px + nx, py, sx - px - nx, bg); 215 grid_clear(gd, sx - nx, py, px + nx - (sx - nx), 1, bg); 216 } 217 218 /* Convert cells into a string. */ 219 char * 220 grid_view_string_cells(struct grid *gd, u_int px, u_int py, u_int nx) 221 { 222 px = grid_view_x(gd, px); 223 py = grid_view_y(gd, py); 224 225 return (grid_string_cells(gd, px, py, nx, NULL, 0, 0, 0)); 226 } 227