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2026-05-12 23:33:02 -07:00 · 2026-05-12 23:33:02 -07:00 · d07c2a5cc9
commit d07c2a5cc9
244 changed files with 72046 additions and 0 deletions
--- a/commands.c
+++ b/commands.c
@ -0,0 +1,115 @@
+#include "commands.h"
+
+#define LOG_MODULE "commands"
+#define LOG_ENABLE_DBG 0
+#include "log.h"
+#include "grid.h"
+#include "render.h"
+#include "selection.h"
+#include "terminal.h"
+#include "url-mode.h"
+#include "util.h"
+
+void
+cmd_scrollback_up(struct terminal *term, int rows)
+{
+    if (term->grid == &term->alt)
+        return;
+    if (urls_mode_is_active(term))
+        return;
+
+    const struct grid *grid = term->grid;
+    const int view = grid->view;
+    const int grid_rows = grid->num_rows;
+
+    /* The view row number in scrollback relative coordinates. This is
+     * the maximum number of rows we're allowed to scroll */
+    int sb_start = grid_sb_start_ignore_uninitialized(grid, term->rows);
+    int view_sb_rel =
+        grid_row_abs_to_sb_precalc_sb_start(grid, sb_start, view);
+
+    rows = min(rows, view_sb_rel);
+    if (rows == 0)
+        return;
+
+    int new_view = (view + grid_rows) - rows;
+    new_view &= grid_rows - 1;
+
+    xassert(new_view != view);
+    xassert(grid->rows[new_view] != NULL);
+#if defined(_DEBUG)
+    for (int r = 0; r < term->rows; r++)
+        xassert(grid->rows[(new_view + r) & (grid->num_rows - 1)] != NULL);
+#endif
+
+    LOG_DBG("scrollback UP: %d -> %d (offset = %d, rows = %d)",
+            view, new_view, offset, grid_rows);
+
+    selection_view_up(term, new_view);
+    term->grid->view = new_view;
+
+    if (rows < term->rows) {
+        term_damage_scroll(
+            term, DAMAGE_SCROLL_REVERSE_IN_VIEW,
+            (struct scroll_region){0, term->rows}, rows);
+        term_damage_rows_in_view(term, 0, rows - 1);
+    } else
+        term_damage_view(term);
+
+    render_refresh_urls(term);
+    render_refresh(term);
+}
+
+void
+cmd_scrollback_down(struct terminal *term, int rows)
+{
+    if (term->grid == &term->alt)
+        return;
+    if (urls_mode_is_active(term))
+        return;
+
+    const struct grid *grid = term->grid;
+    const int offset = grid->offset;
+    const int view = grid->view;
+    const int grid_rows = grid->num_rows;
+    const int screen_rows = term->rows;
+
+    const int scrollback_end = offset;
+
+    /* Number of rows to scroll, without going past the scrollback end */
+    int max_rows = 0;
+    if (view <= scrollback_end)
+        max_rows = scrollback_end - view;
+    else
+        max_rows = offset + (grid_rows - view);
+
+    rows = min(rows, max_rows);
+    if (rows == 0)
+        return;
+
+    int new_view = (view + rows) & (grid_rows - 1);
+
+    xassert(new_view != view);
+    xassert(grid->rows[new_view] != NULL);
+#if defined(_DEBUG)
+    for (int r = 0; r < term->rows; r++)
+        xassert(grid->rows[(new_view + r) & (grid_rows - 1)] != NULL);
+#endif
+
+    LOG_DBG("scrollback DOWN: %d -> %d (offset = %d, rows = %d)",
+            view, new_view, offset, grid_rows);
+
+    selection_view_down(term, new_view);
+    term->grid->view = new_view;
+
+    if (rows < term->rows) {
+        term_damage_scroll(
+            term, DAMAGE_SCROLL_IN_VIEW,
+            (struct scroll_region){0, term->rows}, rows);
+        term_damage_rows_in_view(term, term->rows - rows, screen_rows - 1);
+    } else
+        term_damage_view(term);
+
+    render_refresh_urls(term);
+    render_refresh(term);
+}