1// This is an open source non-commercial project. Dear PVS-Studio, please check
2// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
3
4#include <assert.h>
5#include <stdbool.h>
6#include <stdio.h>
7#include <limits.h>
8
9#include "nvim/assert.h"
10#include "nvim/vim.h"
11#include "nvim/ui.h"
12#include "nvim/ugrid.h"
13
14#ifdef INCLUDE_GENERATED_DECLARATIONS
15# include "ugrid.c.generated.h"
16#endif
17
18void ugrid_init(UGrid *grid)
19{
20 grid->cells = NULL;
21}
22
23void ugrid_free(UGrid *grid)
24{
25 destroy_cells(grid);
26}
27
28void ugrid_resize(UGrid *grid, int width, int height)
29{
30 destroy_cells(grid);
31 grid->cells = xmalloc((size_t)height * sizeof(UCell *));
32 for (int i = 0; i < height; i++) {
33 grid->cells[i] = xcalloc((size_t)width, sizeof(UCell));
34 }
35
36 grid->width = width;
37 grid->height = height;
38}
39
40void ugrid_clear(UGrid *grid)
41{
42 clear_region(grid, 0, grid->height-1, 0, grid->width-1, 0);
43}
44
45void ugrid_clear_chunk(UGrid *grid, int row, int col, int endcol, sattr_T attr)
46{
47 clear_region(grid, row, row, col, endcol-1, attr);
48}
49
50void ugrid_goto(UGrid *grid, int row, int col)
51{
52 grid->row = row;
53 grid->col = col;
54}
55
56void ugrid_scroll(UGrid *grid, int top, int bot, int left, int right, int count)
57{
58 // Compute start/stop/step for the loop below
59 int start, stop, step;
60 if (count > 0) {
61 start = top;
62 stop = bot - count + 1;
63 step = 1;
64 } else {
65 start = bot;
66 stop = top - count - 1;
67 step = -1;
68 }
69
70 int i;
71
72 // Copy cell data
73 for (i = start; i != stop; i += step) {
74 UCell *target_row = grid->cells[i] + left;
75 UCell *source_row = grid->cells[i + count] + left;
76 assert(right >= left && left >= 0);
77 memcpy(target_row, source_row,
78 sizeof(UCell) * ((size_t)right - (size_t)left + 1));
79 }
80}
81
82static void clear_region(UGrid *grid, int top, int bot, int left, int right,
83 sattr_T attr)
84{
85 for (int row = top; row <= bot; row++) {
86 UGRID_FOREACH_CELL(grid, row, left, right+1, {
87 cell->data[0] = ' ';
88 cell->data[1] = 0;
89 cell->attr = attr;
90 });
91 }
92}
93
94static void destroy_cells(UGrid *grid)
95{
96 if (grid->cells) {
97 for (int i = 0; i < grid->height; i++) {
98 xfree(grid->cells[i]);
99 }
100 XFREE_CLEAR(grid->cells);
101 }
102}
103
104