From ed9b8f168ef55d57bd836758f88fc20447292133 Mon Sep 17 00:00:00 2001
From: Christian Dywan <christian@twotoasts.de>
Date: Tue, 31 Jul 2018 23:23:24 +0200
Subject: Make completion more reliable and add placeholder

---
 core/completion.vala     |  6 +++++-
 core/database.vala       | 23 ++++++++++++++++++-----
 core/suggestion-row.vala |  3 ++-
 core/urlbar.vala         | 10 +---------
 ui/urlbar.ui             |  1 +
 5 files changed, 27 insertions(+), 16 deletions(-)

diff --git a/core/completion.vala b/core/completion.vala
index 22b262ce..ab41df41 100644
--- a/core/completion.vala
+++ b/core/completion.vala
@@ -43,7 +43,11 @@ namespace Midori {
         public Completion () {
         }
 
-        void add (ListModel model) {
+        /*
+         * Add a model to complete from. Items need to be based on DatabaseItem
+         * and filtered by key if set.
+         */
+        public virtual signal void add (ListModel model) {
             if (model is Database) {
                 bind_property ("key", model, "key");
             }
diff --git a/core/database.vala b/core/database.vala
index 36c217f8..f47f96a7 100644
--- a/core/database.vala
+++ b/core/database.vala
@@ -192,9 +192,14 @@ namespace Midori {
         public string? table { get; protected set; default = null; }
         public string path { get; protected set; default = ":memory:"; }
         string? _key = null;
+        Cancellable? populate_cancellable = null;
         public string? key { get { return _key; } set {
             _key = value;
-            populate.begin ();
+            if (populate_cancellable != null) {
+                populate_cancellable.cancel ();
+            }
+            populate_cancellable = new Cancellable ();
+            populate.begin (populate_cancellable);
         } }
 
         /*
@@ -396,7 +401,7 @@ namespace Midori {
         /*
          * Query items from the database, matching filter if given.
          */
-        public async List<DatabaseItem>? query (string? filter=null, int64 max_items=15, Cancellable? cancellable=null) throws DatabaseError {
+        public async virtual List<DatabaseItem>? query (string? filter=null, int64 max_items=15, Cancellable? cancellable=null) throws DatabaseError {
             string sqlcmd = """
                 SELECT uri, title, date, count () AS ct FROM %s
                 WHERE uri LIKE :filter OR title LIKE :filter
@@ -500,17 +505,25 @@ namespace Midori {
 
         public uint get_n_items () {
             if (_items == null) {
-                populate.begin ();
+                if (populate_cancellable != null) {
+                    populate_cancellable.cancel ();
+                }
+                populate_cancellable = new Cancellable ();
+                populate.begin (populate_cancellable);
                 return 0;
             }
             return _items.length ();
         }
 
-        async void populate () {
+        async void populate (Cancellable? cancellable) {
             try {
                 uint old_length = _items.length ();
                 _items = yield query (key);
-                items_changed (0, old_length, _items.length ());
+                if (cancellable.is_cancelled ()) {
+                    _items = null;
+                } else {
+                    items_changed (0, old_length, _items.length ());
+                }
             } catch (DatabaseError error) {
                 debug ("Failed to populate: %s", error.message);
             }
diff --git a/core/suggestion-row.vala b/core/suggestion-row.vala
index 3521f782..402d2578 100644
--- a/core/suggestion-row.vala
+++ b/core/suggestion-row.vala
@@ -47,7 +47,8 @@ namespace Midori {
                         title.label = item.title;
                     }
                 });
-            } else {
+            // Double-check type for the sake of plugins
+            } else if (item is DatabaseItem) {
                 icon.uri = item.uri;
                 escaped_title = item.title != null ? Markup.escape_text (item.title) : "";
                 title.label = escaped_title;
diff --git a/core/urlbar.vala b/core/urlbar.vala
index 1b5c70b6..48bef498 100644
--- a/core/urlbar.vala
+++ b/core/urlbar.vala
@@ -246,22 +246,14 @@ namespace Midori {
         }
  
         protected override bool focus_out_event (Gdk.EventFocus event) {
-            suggestions.hide ();
+            popdown ();
             return base.focus_out_event (event);
         }
 
-        /*
-            https://ac.duckduckgo.com/ac/?q={searchTerms}&type=list
-            ["cat",["catlux","cathay pacific","cats","catherine zeta-jones","caterpillar","cathy fischer","cate blanchett","cat stevens","catwoman","catch the millionaire"]]
-            https://encrypted.google.com/complete/search?output=firefox&q={searchTerms}
-            ["cat",["catching fire","catalina island","catching fire movie","cathay pacific","caterpillar","cats","catching fire cast","catwoman","catherine zeta jones","cato"]]
-         */
-
         public void popdown () {
             // Note: Guard against popover being destroyed before popdown
             if (suggestions != null) {
                 suggestions.hide ();
-                grab_focus_without_selecting ();
             }
         }
 
diff --git a/ui/urlbar.ui b/ui/urlbar.ui
index 9a93fb31..3b31b824 100644
--- a/ui/urlbar.ui
+++ b/ui/urlbar.ui
@@ -21,5 +21,6 @@
   </object>
   <template class="MidoriUrlbar" parent="GtkEntry">
     <property name="can-default">yes</property>
+    <property name="placeholder-text" translatable="yes">Search or enter an address</property>
   </template>
 </interface>
-- 
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