Changeset af2ea83 in mainline for uspace/app/nav/panel.c

Timestamp:

2021-10-12T17:06:45Z (3 years ago)

Author:

Jiri Svoboda <jiri@…>

Children:

3e6c51f

Parents:

166aba54

git-author:

Jiri Svoboda <jiri@…> (2021-10-12 17:06:35)

git-committer:

Jiri Svoboda <jiri@…> (2021-10-12 17:06:45)

Message:

Cursor movement (up, down, to top, to bottom)

File:

• uspace/app/nav/panel.c (modified) (12 diffs)

uspace/app/nav/panel.c

@@ -49 +49 @@
 static void panel_ctl_destroy(void *);
 static errno_t panel_ctl_paint(void *);
+static ui_evclaim_t panel_ctl_kbd_event(void *, kbd_event_t *);
 static ui_evclaim_t panel_ctl_pos_event(void *, pos_event_t *);
 
@@ -55 +56 @@
         .destroy = panel_ctl_destroy,
         .paint = panel_ctl_paint,
+        .kbd_event = panel_ctl_kbd_event,
         .pos_event = panel_ctl_pos_event
 };
@@ -90 +92 @@
         panel->window = window;
         list_initialize(&panel->entries);
+        panel->entries_cnt = 0;
         *rpanel = panel;
         return EOK;
@@ -115 +118 @@
 }
 
-/** Paint panel.
- *
- * @param panel Panel
- */
-errno_t panel_paint(panel_t *panel)
-{
+/** Paint panel entry.
+ *
+ * @param entry Panel entry
+ * @param entry_idx Entry index (within list of entries)
+ * @return EOK on success or an error code
+ */
+errno_t panel_entry_paint(panel_entry_t *entry, size_t entry_idx)
+{
+        panel_t *panel = entry->panel;
         gfx_context_t *gc = ui_window_get_gc(panel->window);
         ui_resource_t *res = ui_window_get_res(panel->window);
         gfx_font_t *font = ui_resource_get_font(res);
         gfx_text_fmt_t fmt;
-        panel_entry_t *entry;
         gfx_coord2_t pos;
         gfx_rect_t rect;
+        size_t rows;
+        errno_t rc;
+
+        gfx_text_fmt_init(&fmt);
+
+        rows = panel->rect.p1.y - panel->rect.p0.y - 2;
+
+        /* Do not display entry outside of current page */
+        if (entry_idx < panel->page_idx ||
+            entry_idx >= panel->page_idx + rows)
+                return EOK;
+
+        pos.x = panel->rect.p0.x + 1;
+        pos.y = panel->rect.p0.y + 1 + entry_idx - panel->page_idx;
+
+        if (entry == panel->cursor)
+                fmt.color = panel->curs_color;
+        else
+                fmt.color = panel->color;
+
+        /* Draw entry background */
+        rect.p0 = pos;
+        rect.p1.x = panel->rect.p1.x - 1;
+        rect.p1.y = rect.p0.y + 1;
+
+        rc = gfx_set_color(gc, fmt.color);
+        if (rc != EOK)
+                return rc;
+
+        rc = gfx_fill_rect(gc, &rect);
+        if (rc != EOK)
+                return rc;
+
+        rc = gfx_puttext(font, &pos, &fmt, entry->name);
+        if (rc != EOK)
+                return rc;
+
+        return EOK;
+}
+
+/** Paint panel.
+ *
+ * @param panel Panel
+ */
+errno_t panel_paint(panel_t *panel)
+{
+        gfx_context_t *gc = ui_window_get_gc(panel->window);
+        ui_resource_t *res = ui_window_get_res(panel->window);
+        gfx_text_fmt_t fmt;
+        panel_entry_t *entry;
+        int i, lines;
         errno_t rc;
 
@@ -145 +201 @@
                 return rc;
 
-        pos.x = panel->rect.p0.x + 1;
-        pos.y = panel->rect.p0.y + 1;
+        lines = panel->rect.p1.y - panel->rect.p0.y - 2;
+        i = 0;
 
         entry = panel->page;
-        while (entry != NULL && pos.y < panel->rect.p1.y - 1) {
-                if (entry == panel->cursor) {
-                        /* Draw cursor background */
-                        rect.p0 = pos;
-                        rect.p1.x = panel->rect.p1.x - 1;
-                        rect.p1.y = rect.p0.y + 1;
-
-                        rc = gfx_set_color(gc, panel->curs_color);
-                        if (rc != EOK)
-                                return rc;
-
-                        rc = gfx_fill_rect(gc, &rect);
-                        if (rc != EOK)
-                                return rc;
-
-                        fmt.color = panel->curs_color;
-                } else {
-                        fmt.color = panel->color;
-                }
-
-                rc = gfx_puttext(font, &pos, &fmt, entry->name);
+        while (entry != NULL && i < lines) {
+                rc = panel_entry_paint(entry, panel->page_idx + i);
                 if (rc != EOK)
                         return rc;
 
-                pos.y++;
+                ++i;
                 entry = panel_next(entry);
         }
@@ -184 +221 @@
 }
 
+/** Handle panel keyboard event.
+ *
+ * @param panel Panel
+ * @param event Keyboard event
+ * @return ui_claimed iff event was claimed
+ */
+ui_evclaim_t panel_kbd_event(panel_t *panel, kbd_event_t *event)
+{
+        if (event->type == KEY_PRESS) {
+                if ((event->mods & (KM_CTRL | KM_ALT | KM_SHIFT)) == 0) {
+                        switch (event->key) {
+                        case KC_UP:
+                                panel_cursor_up(panel);
+                                break;
+                        case KC_DOWN:
+                                panel_cursor_down(panel);
+                                break;
+                        case KC_HOME:
+                                panel_cursor_top(panel);
+                                break;
+                        case KC_END:
+                                panel_cursor_bottom(panel);
+                                break;
+                        default:
+                                break;
+                        }
+                }
+        }
+
+        return ui_unclaimed;
+}
+
 /** Handle panel position event.
  *
@@ -236 +305 @@
 
         return panel_paint(panel);
+}
+
+/** Handle panel control keyboard event.
+ *
+ * @param arg Argument (panel_t *)
+ * @param kbd_event Keyboard event
+ * @return @c ui_claimed iff the event is claimed
+ */
+ui_evclaim_t panel_ctl_kbd_event(void *arg, kbd_event_t *event)
+{
+        panel_t *panel = (panel_t *) arg;
+
+        return panel_kbd_event(panel, event);
 }
 
@@ -276 +358 @@
         link_initialize(&entry->lentries);
         list_append(&entry->lentries, &panel->entries);
+        ++panel->entries_cnt;
         return EOK;
 }
@@ -291 +374 @@
 
         list_remove(&entry->lentries);
+        --entry->panel->entries_cnt;
         free(entry->name);
         free(entry);
@@ -337 +421 @@
 
         panel->cursor = panel_first(panel);
+        panel->cursor_idx = 0;
         panel->page = panel_first(panel);
+        panel->page_idx = 0;
         return EOK;
 error:
@@ -360 +446 @@
 }
 
+/** Return last panel entry.
+ *
+ * @panel Panel
+ * @return Last panel entry or @c NULL if there are no entries
+ */
+panel_entry_t *panel_last(panel_t *panel)
+{
+        link_t *link;
+
+        link = list_last(&panel->entries);
+        if (link == NULL)
+                return NULL;
+
+        return list_get_instance(link, panel_entry_t, lentries);
+}
+
 /** Return next panel entry.
  *
@@ -376 +478 @@
 }
 
+/** Return previous panel entry.
+ *
+ * @param cur Current entry
+ * @return Previous entry or @c NULL if @a cur is the first entry
+ */
+panel_entry_t *panel_prev(panel_entry_t *cur)
+{
+        link_t *link;
+
+        link = list_prev(&cur->lentries, &cur->panel->entries);
+        if (link == NULL)
+                return NULL;
+
+        return list_get_instance(link, panel_entry_t, lentries);
+}
+
+void panel_cursor_move(panel_t *panel, panel_entry_t *entry, size_t entry_idx)
+{
+        gfx_context_t *gc = ui_window_get_gc(panel->window);
+        panel_entry_t *old_cursor;
+        size_t old_idx;
+        size_t rows;
+        panel_entry_t *e;
+        size_t i;
+
+        rows = panel->rect.p1.y - panel->rect.p0.y - 2;
+
+        old_cursor = panel->cursor;
+        old_idx = panel->cursor_idx;
+
+        panel->cursor = entry;
+        panel->cursor_idx = entry_idx;
+
+        if (entry_idx >= panel->page_idx &&
+            entry_idx < panel->page_idx + rows) {
+                /*
+                 * If cursor is still on the current page, we're not
+                 * scrolling. Just unpaint old cursor and paint new
+                 * cursor.
+                 */
+                panel_entry_paint(old_cursor, old_idx);
+                panel_entry_paint(panel->cursor, panel->cursor_idx);
+
+                (void) gfx_update(gc);
+        } else {
+                /*
+                 * Need to scroll and update all rows.
+                 */
+
+                /* Scrolling up */
+                if (entry_idx < panel->page_idx) {
+                        panel->page = entry;
+                        panel->page_idx = entry_idx;
+                }
+
+                /* Scrolling down */
+                if (entry_idx >= panel->page_idx + rows) {
+                        if (entry_idx >= rows) {
+                                panel->page_idx = entry_idx - rows + 1;
+                                /* Find first page entry (go back rows - 1) */
+                                e = entry;
+                                for (i = 0; i < rows - 1; i++) {
+                                        e = panel_prev(e);
+                                }
+
+                                /* Should be valid */
+                                assert(e != NULL);
+                                panel->page = e;
+                        } else {
+                                panel->page = panel_first(panel);
+                                panel->page_idx = 0;
+                        }
+                }
+
+                (void) panel_paint(panel);
+        }
+}
+
+/** Move cursor one entry up.
+ *
+ * @param panel Panel
+ */
+void panel_cursor_up(panel_t *panel)
+{
+        panel_entry_t *prev;
+        size_t prev_idx;
+
+        prev = panel_prev(panel->cursor);
+        prev_idx = panel->cursor_idx - 1;
+        if (prev != NULL)
+                panel_cursor_move(panel, prev, prev_idx);
+}
+
+/** Move cursor one entry down.
+ *
+ * @param panel Panel
+ */
+void panel_cursor_down(panel_t *panel)
+{
+        panel_entry_t *next;
+        size_t next_idx;
+
+        next = panel_next(panel->cursor);
+        next_idx = panel->cursor_idx + 1;
+        if (next != NULL)
+                panel_cursor_move(panel, next, next_idx);
+}
+
+/** Move cursor to top.
+ *
+ * @param panel Panel
+ */
+void panel_cursor_top(panel_t *panel)
+{
+        panel_cursor_move(panel, panel_first(panel), 0);
+}
+
+/** Move cursor to bottom.
+ *
+ * @param panel Panel
+ */
+void panel_cursor_bottom(panel_t *panel)
+{
+        panel_cursor_move(panel, panel_last(panel), panel->entries_cnt - 1);
+}
+
 /** @}
  */