1 /* $OpenBSD: grid-view.c,v 1.26 2016/10/13 20:27:27 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 /* Clear into history. */ 49 void 50 grid_view_clear_history(struct grid *gd, u_int bg) 51 { 52 struct grid_line *gl; 53 u_int yy, last; 54 55 /* Find the last used line. */ 56 last = 0; 57 for (yy = 0; yy < gd->sy; yy++) { 58 gl = &gd->linedata[grid_view_y(gd, yy)]; 59 if (gl->cellused != 0) 60 last = yy + 1; 61 } 62 if (last == 0) { 63 grid_view_clear(gd, 0, 0, gd->sx, gd->sy, bg); 64 return; 65 } 66 67 /* Scroll the lines into the history. */ 68 for (yy = 0; yy < last; yy++) { 69 grid_collect_history(gd, bg); 70 grid_scroll_history(gd, bg); 71 } 72 if (last < gd->sy) 73 grid_view_clear(gd, 0, 0, gd->sx, gd->sy - last, bg); 74 gd->hscrolled = 0; 75 } 76 77 /* Clear area. */ 78 void 79 grid_view_clear(struct grid *gd, u_int px, u_int py, u_int nx, u_int ny, 80 u_int bg) 81 { 82 px = grid_view_x(gd, px); 83 py = grid_view_y(gd, py); 84 85 grid_clear(gd, px, py, nx, ny, bg); 86 } 87 88 /* Scroll region up. */ 89 void 90 grid_view_scroll_region_up(struct grid *gd, u_int rupper, u_int rlower) 91 { 92 if (gd->flags & GRID_HISTORY) { 93 grid_collect_history(gd, 8); 94 if (rupper == 0 && rlower == gd->sy - 1) 95 grid_scroll_history(gd, 8); 96 else { 97 rupper = grid_view_y(gd, rupper); 98 rlower = grid_view_y(gd, rlower); 99 grid_scroll_history_region(gd, rupper, rlower); 100 } 101 } else { 102 rupper = grid_view_y(gd, rupper); 103 rlower = grid_view_y(gd, rlower); 104 grid_move_lines(gd, rupper, rupper + 1, rlower - rupper, 8); 105 } 106 } 107 108 /* Scroll region down. */ 109 void 110 grid_view_scroll_region_down(struct grid *gd, u_int rupper, u_int rlower) 111 { 112 rupper = grid_view_y(gd, rupper); 113 rlower = grid_view_y(gd, rlower); 114 115 grid_move_lines(gd, rupper + 1, rupper, rlower - rupper, 8); 116 } 117 118 /* Insert lines. */ 119 void 120 grid_view_insert_lines(struct grid *gd, u_int py, u_int ny, u_int bg) 121 { 122 u_int sy; 123 124 py = grid_view_y(gd, py); 125 126 sy = grid_view_y(gd, gd->sy); 127 128 grid_move_lines(gd, py + ny, py, sy - py - ny, bg); 129 } 130 131 /* Insert lines in region. */ 132 void 133 grid_view_insert_lines_region(struct grid *gd, u_int rlower, u_int py, 134 u_int ny, u_int bg) 135 { 136 u_int ny2; 137 138 rlower = grid_view_y(gd, rlower); 139 140 py = grid_view_y(gd, py); 141 142 ny2 = rlower + 1 - py - ny; 143 grid_move_lines(gd, rlower + 1 - ny2, py, ny2, bg); 144 grid_clear(gd, 0, py + ny2, gd->sx, ny - ny2, bg); 145 } 146 147 /* Delete lines. */ 148 void 149 grid_view_delete_lines(struct grid *gd, u_int py, u_int ny, u_int bg) 150 { 151 u_int sy; 152 153 py = grid_view_y(gd, py); 154 155 sy = grid_view_y(gd, gd->sy); 156 157 grid_move_lines(gd, py, py + ny, sy - py - ny, bg); 158 grid_clear(gd, 0, sy - ny, gd->sx, py + ny - (sy - ny), bg); 159 } 160 161 /* Delete lines inside scroll region. */ 162 void 163 grid_view_delete_lines_region(struct grid *gd, u_int rlower, u_int py, 164 u_int ny, u_int bg) 165 { 166 u_int ny2; 167 168 rlower = grid_view_y(gd, rlower); 169 170 py = grid_view_y(gd, py); 171 172 ny2 = rlower + 1 - py - ny; 173 grid_move_lines(gd, py, py + ny, ny2, bg); 174 grid_clear(gd, 0, py + ny2, gd->sx, ny - ny2, bg); 175 } 176 177 /* Insert characters. */ 178 void 179 grid_view_insert_cells(struct grid *gd, u_int px, u_int py, u_int nx, u_int bg) 180 { 181 u_int sx; 182 183 px = grid_view_x(gd, px); 184 py = grid_view_y(gd, py); 185 186 sx = grid_view_x(gd, gd->sx); 187 188 if (px == sx - 1) 189 grid_clear(gd, px, py, 1, 1, bg); 190 else 191 grid_move_cells(gd, px + nx, px, py, sx - px - nx, bg); 192 } 193 194 /* Delete characters. */ 195 void 196 grid_view_delete_cells(struct grid *gd, u_int px, u_int py, u_int nx, u_int bg) 197 { 198 u_int sx; 199 200 px = grid_view_x(gd, px); 201 py = grid_view_y(gd, py); 202 203 sx = grid_view_x(gd, gd->sx); 204 205 grid_move_cells(gd, px, px + nx, py, sx - px - nx, bg); 206 grid_clear(gd, sx - nx, py, px + nx - (sx - nx), 1, bg); 207 } 208 209 /* Convert cells into a string. */ 210 char * 211 grid_view_string_cells(struct grid *gd, u_int px, u_int py, u_int nx) 212 { 213 px = grid_view_x(gd, px); 214 py = grid_view_y(gd, py); 215 216 return (grid_string_cells(gd, px, py, nx, NULL, 0, 0, 0)); 217 } 218