From 90f71fe6e455f568f1b0810cda17db56ae1426f6 Mon Sep 17 00:00:00 2001
From: Miciah Dashiel Butler Masters <miciah@myrealbox.com>
Date: Fri, 14 Apr 2006 21:46:35 +0000
Subject: [PATCH] Highlight links as one enters link prefixes.

---
 src/viewer/text/link.c | 33 +++++++++++++++++++++++++++++++++
 src/viewer/text/link.h |  4 ++++
 src/viewer/text/view.c |  7 +++++++
 3 files changed, 44 insertions(+)

diff --git a/src/viewer/text/link.c b/src/viewer/text/link.c
index 3e10d6fe7..90f48809d 100644
--- a/src/viewer/text/link.c
+++ b/src/viewer/text/link.c
@@ -11,6 +11,7 @@
 
 #include "bfu/listmenu.h"
 #include "bfu/menu.h"
+#include "bfu/style.h"
 #include "dialogs/menu.h"
 #include "dialogs/status.h"
 #include "document/document.h"
@@ -31,6 +32,7 @@
 #include "terminal/screen.h"
 #include "terminal/tab.h"
 #include "terminal/terminal.h"
+#include "util/box.h"
 #include "util/conv.h"
 #include "util/error.h"
 #include "util/memory.h"
@@ -320,6 +322,37 @@ clear_link(struct terminal *term, struct document_view *doc_view)
 	}
 }
 
+void
+highlight_links_with_prefixes_that_start_with_n(struct terminal *term,
+                                                struct document_view *doc_view,
+                                                int n)
+{
+	struct color_pair *color = get_bfu_color(term, "searched");
+	int xoffset = doc_view->box.x - doc_view->vs->x;
+	int yoffset = doc_view->box.y - doc_view->vs->y;
+	struct document *document = doc_view->document;
+	int m;
+
+	for (m = n + 1; n <= document->nlinks; n *= 10, m *= 10) {
+		int linkn;
+
+		for (linkn = n; linkn < m; ++linkn) {
+			struct link *link = &document->links[linkn - 1];
+			int i;
+
+			if (linkn > document->nlinks) break;
+
+			for (i = 0; i < link->npoints; ++i) {
+				int x = link->points[i].x + xoffset;
+				int y = link->points[i].y + yoffset;
+
+				if (is_in_box(&doc_view->box, x, y))
+					draw_char_color(term, x, y, color);
+			}
+		}
+	}
+}
+
 struct link *
 get_first_link(struct document_view *doc_view)
 {
diff --git a/src/viewer/text/link.h b/src/viewer/text/link.h
index 6014be88b..4cfc54918 100644
--- a/src/viewer/text/link.h
+++ b/src/viewer/text/link.h
@@ -17,6 +17,10 @@ void free_link(struct document_view *doc_view);
 void clear_link(struct terminal *term, struct document_view *doc_view);
 void draw_current_link(struct session *ses, struct document_view *doc_view);
 
+void highlight_links_with_prefixes_that_start_with_n(struct terminal *term,
+                                                 struct document_view *doc_view,
+                                                 int n);
+
 void link_menu(struct terminal *term, void *, void *ses);
 
 struct link *get_first_link(struct document_view *doc_view);
diff --git a/src/viewer/text/view.c b/src/viewer/text/view.c
index 24f6606d2..f135528ba 100644
--- a/src/viewer/text/view.c
+++ b/src/viewer/text/view.c
@@ -689,6 +689,9 @@ try_prefix_key(struct session *ses, struct document_view *doc_view,
 		 * the first time by init_session() calloc() call.
 		 * When used, it has to be reset to zero. */
 
+		/* Clear the highlighting for the previous partial prefix. */
+		if (ses->kbdprefix.repeat_count) draw_formatted(ses, 0);
+
 		ses->kbdprefix.repeat_count *= 10;
 		ses->kbdprefix.repeat_count += digit;
 
@@ -696,6 +699,10 @@ try_prefix_key(struct session *ses, struct document_view *doc_view,
 		 * '0' six times or more will reset the count. */
 		if (ses->kbdprefix.repeat_count > 99999)
 			ses->kbdprefix.repeat_count = 0;
+		else if (ses->kbdprefix.repeat_count)
+			highlight_links_with_prefixes_that_start_with_n(
+			                           ses->tab->term, doc_view,
+			                           ses->kbdprefix.repeat_count);
 
 		return FRAME_EVENT_OK;
 	}