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annotate src/libvterm/src/rect.h @ 20518:a4652d7ec99f v8.2.0813

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patch 8.2.0813: libvterm code is slightly different from upstream Commit: https://github.com/vim/vim/commit/591cec8366e87a172495c362477cbf5de8d399f0 Author: Bram Moolenaar <Bram@vim.org> Date: Fri May 22 22:06:06 2020 +0200 patch 8.2.0813: libvterm code is slightly different from upstream Problem: libvterm code is slightly different from upstream. Solution: Use upstream text to avoid future merge problems. Mainly comment style changes.
author Bram Moolenaar <Bram@vim.org>
date Fri, 22 May 2020 22:15:04 +0200
parents 811a12a78164
children ac9464a32606
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1 /*
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2 * Some utility functions on VTermRect structures
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3 */
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4
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5 #define STRFrect "(%d,%d-%d,%d)"
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6 #define ARGSrect(r) (r).start_row, (r).start_col, (r).end_row, (r).end_col
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7
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8 /* Expand dst to contain src as well */
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9 static void rect_expand(VTermRect *dst, VTermRect *src)
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10 {
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11 if(dst->start_row > src->start_row) dst->start_row = src->start_row;
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12 if(dst->start_col > src->start_col) dst->start_col = src->start_col;
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13 if(dst->end_row < src->end_row) dst->end_row = src->end_row;
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14 if(dst->end_col < src->end_col) dst->end_col = src->end_col;
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15 }
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16
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17 /* Clip the dst to ensure it does not step outside of bounds */
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18 static void rect_clip(VTermRect *dst, VTermRect *bounds)
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19 {
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20 if(dst->start_row < bounds->start_row) dst->start_row = bounds->start_row;
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21 if(dst->start_col < bounds->start_col) dst->start_col = bounds->start_col;
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22 if(dst->end_row > bounds->end_row) dst->end_row = bounds->end_row;
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23 if(dst->end_col > bounds->end_col) dst->end_col = bounds->end_col;
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24 /* Ensure it doesn't end up negatively-sized */
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25 if(dst->end_row < dst->start_row) dst->end_row = dst->start_row;
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26 if(dst->end_col < dst->start_col) dst->end_col = dst->start_col;
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27 }
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28
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29 /* True if the two rectangles are equal */
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30 static int rect_equal(VTermRect *a, VTermRect *b)
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31 {
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32 return (a->start_row == b->start_row) &&
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33 (a->start_col == b->start_col) &&
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34 (a->end_row == b->end_row) &&
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35 (a->end_col == b->end_col);
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36 }
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37
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38 /* True if small is contained entirely within big */
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39 static int rect_contains(VTermRect *big, VTermRect *small)
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40 {
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41 if(small->start_row < big->start_row) return 0;
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42 if(small->start_col < big->start_col) return 0;
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43 if(small->end_row > big->end_row) return 0;
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44 if(small->end_col > big->end_col) return 0;
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45 return 1;
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46 }
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47
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48 /* True if the rectangles overlap at all */
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49 static int rect_intersects(VTermRect *a, VTermRect *b)
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50 {
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51 if(a->start_row > b->end_row || b->start_row > a->end_row)
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52 return 0;
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53 if(a->start_col > b->end_col || b->start_col > a->end_col)
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54 return 0;
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55 return 1;
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56 }