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115 lines
3.1 KiB
C
115 lines
3.1 KiB
C
#include "commands.h"
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#define LOG_MODULE "commands"
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#define LOG_ENABLE_DBG 0
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#include "log.h"
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#include "grid.h"
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#include "render.h"
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#include "selection.h"
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#include "terminal.h"
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#include "url-mode.h"
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#include "util.h"
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void
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cmd_scrollback_up(struct terminal *term, int rows)
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{
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if (term->grid == &term->alt)
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return;
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if (urls_mode_is_active(term))
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return;
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const struct grid *grid = term->grid;
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const int view = grid->view;
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const int grid_rows = grid->num_rows;
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/* The view row number in scrollback relative coordinates. This is
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* the maximum number of rows we're allowed to scroll */
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int sb_start = grid_sb_start_ignore_uninitialized(grid, term->rows);
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int view_sb_rel =
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grid_row_abs_to_sb_precalc_sb_start(grid, sb_start, view);
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rows = min(rows, view_sb_rel);
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if (rows == 0)
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return;
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int new_view = (view + grid_rows) - rows;
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new_view &= grid_rows - 1;
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xassert(new_view != view);
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xassert(grid->rows[new_view] != NULL);
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#if defined(_DEBUG)
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for (int r = 0; r < term->rows; r++)
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xassert(grid->rows[(new_view + r) & (grid->num_rows - 1)] != NULL);
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#endif
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LOG_DBG("scrollback UP: %d -> %d (offset = %d, rows = %d)",
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view, new_view, offset, grid_rows);
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selection_view_up(term, new_view);
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term->grid->view = new_view;
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if (rows < term->rows) {
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term_damage_scroll(
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term, DAMAGE_SCROLL_REVERSE_IN_VIEW,
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(struct scroll_region){0, term->rows}, rows);
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term_damage_rows_in_view(term, 0, rows - 1);
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} else
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term_damage_view(term);
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render_refresh_urls(term);
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render_refresh(term);
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}
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void
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cmd_scrollback_down(struct terminal *term, int rows)
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{
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if (term->grid == &term->alt)
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return;
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if (urls_mode_is_active(term))
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return;
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const struct grid *grid = term->grid;
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const int offset = grid->offset;
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const int view = grid->view;
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const int grid_rows = grid->num_rows;
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const int screen_rows = term->rows;
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const int scrollback_end = offset;
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/* Number of rows to scroll, without going past the scrollback end */
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int max_rows = 0;
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if (view <= scrollback_end)
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max_rows = scrollback_end - view;
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else
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max_rows = offset + (grid_rows - view);
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rows = min(rows, max_rows);
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if (rows == 0)
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return;
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int new_view = (view + rows) & (grid_rows - 1);
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xassert(new_view != view);
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xassert(grid->rows[new_view] != NULL);
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#if defined(_DEBUG)
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for (int r = 0; r < term->rows; r++)
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xassert(grid->rows[(new_view + r) & (grid_rows - 1)] != NULL);
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#endif
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LOG_DBG("scrollback DOWN: %d -> %d (offset = %d, rows = %d)",
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view, new_view, offset, grid_rows);
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selection_view_down(term, new_view);
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term->grid->view = new_view;
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if (rows < term->rows) {
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term_damage_scroll(
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term, DAMAGE_SCROLL_IN_VIEW,
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(struct scroll_region){0, term->rows}, rows);
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term_damage_rows_in_view(term, term->rows - rows, screen_rows - 1);
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} else
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term_damage_view(term);
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render_refresh_urls(term);
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render_refresh(term);
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}
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