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Diffstat (limited to 'ui.c')
-rw-r--r--ui.c36
1 files changed, 27 insertions, 9 deletions
diff --git a/ui.c b/ui.c
index 8184ecd..8f90bbb 100644
--- a/ui.c
+++ b/ui.c
@@ -12,6 +12,28 @@ static float file_selector_entries_start_y(Ted const *ted, FileSelector const *f
+ char_height * 1.5f; // make room for line buffer
}
+// number of file entries that can be displayed on the screen
+static u32 file_selector_n_display_entries(Ted const *ted, FileSelector const *fs) {
+ float char_height = text_font_char_height(ted->font);
+ float entries_h = rect_y2(fs->bounds) - file_selector_entries_start_y(ted, fs);
+ return (u32)(entries_h / char_height);
+}
+
+static void file_selector_clamp_scroll(Ted const *ted, FileSelector *fs) {
+ float max_scroll = (float)fs->n_entries - (float)file_selector_n_display_entries(ted, fs);
+ if (max_scroll < 0) max_scroll = 0;
+ fs->scroll = clampf(fs->scroll, 0, max_scroll);
+}
+
+static void file_selector_scroll_to_selected(Ted const *ted, FileSelector *fs) {
+ u32 n_display_entries = file_selector_n_display_entries(ted, fs);
+ float scrolloff = ted->settings.scrolloff;
+ float min_scroll = (float)fs->selected - ((float)n_display_entries - scrolloff);
+ float max_scroll = (float)fs->selected - scrolloff;
+ fs->scroll = clampf(fs->scroll, min_scroll, max_scroll);
+ file_selector_clamp_scroll(ted, fs);
+}
+
// where is the ith entry in the file selector on the screen?
// returns false if it's completely offscreen
static bool file_selector_entry_pos(Ted const *ted, FileSelector const *fs,
@@ -41,16 +63,18 @@ static void file_selector_free(FileSelector *fs) {
memset(fs, 0, sizeof *fs);
}
-static void file_selector_up(FileSelector *fs, i64 n) {
+static void file_selector_up(Ted const *ted, FileSelector *fs, i64 n) {
i64 selected = fs->selected - n;
selected = mod_i64(selected, fs->n_entries);
fs->selected = (u32)selected;
+ file_selector_scroll_to_selected(ted, fs);
}
-static void file_selector_down(FileSelector *fs, i64 n) {
+static void file_selector_down(Ted const *ted, FileSelector *fs, i64 n) {
i64 selected = fs->selected + n;
selected = mod_i64(selected, fs->n_entries);
fs->selected = (u32)selected;
+ file_selector_scroll_to_selected(ted, fs);
}
static int qsort_file_entry_cmp(void const *av, void const *bv, void *search_termv) {
@@ -351,13 +375,7 @@ static char *file_selector_update(Ted *ted, FileSelector *fs) {
// apply scroll
float scroll_speed = 2.5f;
fs->scroll += scroll_speed * (float)ted->scroll_total_y;
- // clamp scroll
- float char_height = text_font_char_height(ted->font);
- float entries_h = rect_y2(fs->bounds) - file_selector_entries_start_y(ted, fs);
- u32 n_display_entries = (u32)(entries_h / char_height);
- float max_scroll = (float)fs->n_entries - (float)n_display_entries;
- if (max_scroll < 0) max_scroll = 0;
- fs->scroll = clampf(fs->scroll, 0, max_scroll);
+ file_selector_clamp_scroll(ted, fs);
free(search_term);
return NULL;