From 8db6d74bcb2c04285378e9eaa863dc4de5d5e4ba Mon Sep 17 00:00:00 2001
From: Michael Drake <tlsa@netsurf-browser.org>
Date: Tue, 31 Jul 2012 14:04:12 +0100
Subject: [PATCH] Add basic awareness of text input caret to ftbk and functions
 to get/set caret pos.

---
 framebuffer/fbtk.h        | 20 ++++++++++++++++++
 framebuffer/fbtk/fbtk.c   | 44 +++++++++++++++++++++++++++++++++++++++
 framebuffer/fbtk/widget.h |  8 +++++++
 3 files changed, 72 insertions(+)

diff --git a/framebuffer/fbtk.h b/framebuffer/fbtk.h
index e58795742..131ae6521 100644
--- a/framebuffer/fbtk.h
+++ b/framebuffer/fbtk.h
@@ -247,6 +247,16 @@ int fbtk_get_height(fbtk_widget_t *widget);
  */
 bool fbtk_get_bbox(fbtk_widget_t *widget, struct nsfb_bbox_s *bbox);
 
+/** Get a widget caret pos, if it owns caret.
+ *
+ * @param widget  The widget to inspect.
+ * @param x       If widget has caret, returns x-coord of caret within widget
+ * @param y       If widget has caret, returns y-coord of caret within widget
+ * @param height  If widget has caret, returns caret height
+ * @return true iff widget has caret
+ */
+bool fbtk_get_caret(fbtk_widget_t *widget, int *x, int *y, int *height);
+
 
 /******************* Widget Manipulation **********************/
 
@@ -255,6 +265,16 @@ bool fbtk_get_bbox(fbtk_widget_t *widget, struct nsfb_bbox_s *bbox);
  */
 bool fbtk_set_pos_and_size(fbtk_widget_t *widget, int x, int y, int width, int height);
 
+/** Set caret owner and position
+ *
+ * @param widget  widget to give caret to, or ensure caret is released from
+ * @param set     true: caret to be set for widget, false: caret to be released
+ * @param x       x-coordinate of caret top
+ * @param y       y-coordinate of caret top
+ * @param height  height of caret
+ */
+void fbtk_set_caret(fbtk_widget_t *widget, bool set, int x, int y, int height);
+
 /** Map a widget and request it is redrawn.
  */
 int fbtk_set_mapping(fbtk_widget_t *widget, bool mapped);
diff --git a/framebuffer/fbtk/fbtk.c b/framebuffer/fbtk/fbtk.c
index db298ebdc..8e8bc112c 100644
--- a/framebuffer/fbtk/fbtk.c
+++ b/framebuffer/fbtk/fbtk.c
@@ -220,6 +220,28 @@ fbtk_set_pos_and_size(fbtk_widget_t *widget,
 	return false;
 }
 
+
+/* exported function docuemnted in fbtk.h */
+void
+fbtk_set_caret(fbtk_widget_t *widget, bool set,
+		int x, int y, int height)
+{
+	fbtk_widget_t *root;
+
+	assert(widget != NULL);
+	root = fbtk_get_root_widget(widget);
+
+	if (set) {
+		root->u.root.caret.owner = widget;
+		root->u.root.caret.x = x;
+		root->u.root.caret.y = y;
+		root->u.root.caret.height = height;
+
+	} else {
+		root->u.root.caret.owner = NULL;
+	}
+}
+
 /* exported function documented in fbtk.h */
 int
 fbtk_destroy_widget(fbtk_widget_t *widget)
@@ -429,6 +451,27 @@ fbtk_get_bbox(fbtk_widget_t *widget, nsfb_bbox_t *bbox)
 	return true;
 }
 
+bool
+fbtk_get_caret(fbtk_widget_t *widget, int *x, int *y, int *height)
+{
+	fbtk_widget_t *root = fbtk_get_root_widget(widget);
+
+	if (root->u.root.caret.owner == widget) {
+		*x = root->u.root.caret.x;
+		*y = root->u.root.caret.y;
+		*height = root->u.root.caret.height;
+
+		return true;
+
+	} else {
+		*x = 0;
+		*y = 0;
+		*height = 0;
+
+		return false;
+	}
+}
+
 /* exported function documented in fbtk.h */
 fbtk_widget_t *
 fbtk_get_widget_at(fbtk_widget_t *nwid, int x, int y)
@@ -727,6 +770,7 @@ fbtk_init(nsfb_t *fb)
 
 	root->type = FB_WIDGET_TYPE_ROOT;
 	root->u.root.fb = fb;
+	root->u.root.caret.owner = NULL;
 
 	nsfb_get_geometry(fb, &root->width, &root->height, NULL);
 
diff --git a/framebuffer/fbtk/widget.h b/framebuffer/fbtk/widget.h
index 060999bba..e31fa117d 100644
--- a/framebuffer/fbtk/widget.h
+++ b/framebuffer/fbtk/widget.h
@@ -161,6 +161,14 @@ struct fbtk_widget_s {
 			struct fbtk_widget_s *prev; /* previous widget pointer wasin */
 			struct fbtk_widget_s *grabbed; /* widget that has grabbed pointer movement. */
 			struct fbtk_widget_s *input;
+
+			/* caret */
+			struct {
+				struct fbtk_widget_s *owner; /* widget / NULL */
+				int x; /* relative to owner */
+				int y; /* relative to owner */
+				int height;
+			} caret;
 		} root;
 
 		/* bitmap */