html: Mirror gadget values in and out of the DOM

Currently only supporting text input, password input, and hidden
input, along with text areas, this mirrors the text values in
and out of the DOM, allowing JS to adjust the gadget values and
for the gadget values to be interrogated from JS.

Signed-off-by: Daniel Silverstone <dsilvers@digital-scurf.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/content/handlers/html/html.c b/content/handlers/html/html.c
index 7280ff66a..f72284daf 100644
--- a/content/handlers/html/html.c
+++ b/content/handlers/html/html.c
@@ -829,6 +829,23 @@ dom_default_action_DOMNodeInsertedIntoDocument_cb(struct dom_event *evt, void *p
 	}
 }
 
+/* Deal with input elements being modified by resyncing their gadget
+ * if they have one.
+ */
+static void html_texty_element_update(html_content *htmlc, dom_node *node)
+{
+	struct box *box = box_for_node(node);
+	if (box == NULL) {
+		return; /* No Box (yet?) so no gadget to update */
+	}
+	if (box->gadget == NULL) {
+		return; /* No gadget yet (under construction perhaps?) */
+	}
+	form_gadget_sync_with_dom(box->gadget);
+	/* And schedule a redraw for the box */
+	html__redraw_a_box(htmlc, box);
+}
+
 /* callback for DOMSubtreeModified end type */
 static void
 dom_default_action_DOMSubtreeModified_cb(struct dom_event *evt, void *pw)
@@ -861,6 +878,9 @@ dom_default_action_DOMSubtreeModified_cb(struct dom_event *evt, void *pw)
 			case DOM_HTML_ELEMENT_TYPE_STYLE:
 				html_css_update_style(htmlc, (dom_node *)node);
 				break;
+			case DOM_HTML_ELEMENT_TYPE_TEXTAREA:
+			case DOM_HTML_ELEMENT_TYPE_INPUT:
+				html_texty_element_update(htmlc, (dom_node *)node);
 			default:
 				break;
 			}