panel: make panel_move_cursor()

2 files changed, 37 insertions, 0 deletions

diff --git a/Library/UefiShellUfmCommandLib/panel.c b/Library/UefiShellUfmCommandLib/panel.c
index cc33aee..c8d3565 100644
--- a/Library/UefiShellUfmCommandLib/panel.c
+++ b/Library/UefiShellUfmCommandLib/panel.c
@@ -278,3 +278,30 @@ VOID panel_release(struct panel_ctx *p)
 
 	FreePool(p);
 }
+BOOLEAN panel_move_cursor(struct panel_ctx *p, UINTN line)
+{
+	UINTN oldline = p->curline;
+	UINTN maxlen = (p->cwd) ? p->dirs->len : p->fsa->len;
+
+	if(line < 1 || line > maxlen)
+		return FALSE;
+
+	if(line < p->start_entry || line >= (p->start_entry + p->list_lines) ||
+			p->start_entry == 0)
+	{
+		p->start_entry = line - ((line-1) % p->list_lines);
+		
+		if(!p->cwd)
+			display_fs(p, p->start_entry);
+		else
+			display_files(p, p->start_entry);
+	}
+	else
+		UNHIGHLIGHT_LINE_AS_CURRENT(p, oldline);
+
+	p->curline = line;
+	update_file_info(p);
+	HIGHLIGHT_LINE_AS_CURRENT(p, p->curline);
+	return TRUE;
+}
+
diff --git a/Library/UefiShellUfmCommandLib/panel.h b/Library/UefiShellUfmCommandLib/panel.h
index 2706dd6..1d71258 100644
--- a/Library/UefiShellUfmCommandLib/panel.h
+++ b/Library/UefiShellUfmCommandLib/panel.h
@@ -50,4 +50,14 @@ struct panel_ctx *panel_alloc(struct screen *scr, CONST CHAR16 *path,
 */
 VOID panel_release(struct panel_ctx *p);
 
+/*
+ * Moves cursor position to specified line
+ *
+ * p: the panel on which to operate
+ * line: the line coordinate (starts from 1)
+ *
+ * return: FALSE upon failure and TRUE upon successful completion
+*/
+BOOLEAN panel_move_cursor(struct panel_ctx *p, UINTN line);
+
 #endif /* UFM_PANEL_H */