[evince] browser-plugin: Add search support

[Carlos Garcia Campos <carlosgc src gnome org>]

commit f7d87a40a875d2a6a771e6beca62cb93d9a5d5d8
Author: Carlos Garcia Campos <cgarcia igalia com>
Date:   Wed Apr 8 18:40:40 2015 +0200

    browser-plugin: Add search support
    
    Add a search button to the toolbar, that shows a popover with a
    EvSearchBox.

 browser-plugin/EvBrowserPlugin.cpp        |   34 ++++++++++++++
 browser-plugin/EvBrowserPlugin.h          |    7 +++
 browser-plugin/EvBrowserPluginToolbar.cpp |   68 +++++++++++++++++++++++++++++
 3 files changed, 109 insertions(+), 0 deletions(-)
---
diff --git a/browser-plugin/EvBrowserPlugin.cpp b/browser-plugin/EvBrowserPlugin.cpp
index 003e30d..3b40158 100644
--- a/browser-plugin/EvBrowserPlugin.cpp
+++ b/browser-plugin/EvBrowserPlugin.cpp
@@ -479,6 +479,40 @@ void EvBrowserPlugin::setToolbarVisible(bool isVisible)
                 gtk_widget_hide(m_toolbar);
 }
 
+void EvBrowserPlugin::setSearchModeEnabled(bool enabled)
+{
+        ev_view_find_set_highlight_search(m_view, enabled);
+}
+
+void EvBrowserPlugin::search(EvJobFind *job)
+{
+        ev_view_find_search_changed(m_view);
+        ev_view_find_started(m_view, job);
+}
+
+void EvBrowserPlugin::search(SearchDirection direction)
+{
+        switch (direction) {
+        case Next:
+                ev_view_find_next(m_view);
+                break;
+        case Previous:
+                ev_view_find_previous(m_view);
+                break;
+        }
+}
+
+void EvBrowserPlugin::clearSearch()
+{
+        ev_view_find_search_changed(m_view);
+        gtk_widget_queue_draw(GTK_WIDGET(m_view));
+}
+
+void EvBrowserPlugin::restartSearch()
+{
+        ev_view_find_restart(m_view, ev_document_model_get_page(m_model));
+}
+
 // Scripting interface
 NPObject *EvBrowserPlugin::allocate(NPP instance, NPClass *)
 {
diff --git a/browser-plugin/EvBrowserPlugin.h b/browser-plugin/EvBrowserPlugin.h
index b6e1638..6a3533d 100644
--- a/browser-plugin/EvBrowserPlugin.h
+++ b/browser-plugin/EvBrowserPlugin.h
@@ -75,6 +75,13 @@ public:
 
         bool canDownload() const;
 
+        void setSearchModeEnabled(bool);
+        void search(EvJobFind *);
+        enum SearchDirection { Next, Previous };
+        void search(SearchDirection);
+        void clearSearch();
+        void restartSearch();
+
 private:
         EvBrowserPlugin(NPP);
         virtual ~EvBrowserPlugin();
diff --git a/browser-plugin/EvBrowserPluginToolbar.cpp b/browser-plugin/EvBrowserPluginToolbar.cpp
index 0e487bb..c7e4bc3 100644
--- a/browser-plugin/EvBrowserPluginToolbar.cpp
+++ b/browser-plugin/EvBrowserPluginToolbar.cpp
@@ -20,6 +20,7 @@
 #include "EvBrowserPluginToolbar.h"
 
 #include "ev-page-action-widget.h"
+#include "ev-search-box.h"
 #include <glib/gi18n-lib.h>
 
 enum {
@@ -35,6 +36,8 @@ struct _EvBrowserPluginToolbarPrivate {
         GtkWidget *zoomFitPageRadioButton;
         GtkWidget *zoomFitWidthRadioButton;
         GtkWidget *zoomAutomaticRadioButton;
+        GtkWidget *searchToggleButton;
+        GtkWidget *searchPopover;
 };
 
 G_DEFINE_TYPE(EvBrowserPluginToolbar, ev_browser_plugin_toolbar, GTK_TYPE_TOOLBAR)
@@ -102,6 +105,60 @@ static void downloadDocument(EvBrowserPluginToolbar *toolbar)
         toolbar->priv->plugin->download();
 }
 
+static void searchPopoverClosed(EvBrowserPluginToolbar *toolbar)
+{
+        if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(toolbar->priv->searchToggleButton)))
+                gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(toolbar->priv->searchToggleButton), FALSE);
+}
+
+static void searchStarted(EvBrowserPluginToolbar *toolbar, EvJobFind *job)
+{
+        toolbar->priv->plugin->search(job);
+}
+
+static void searchCleared(EvBrowserPluginToolbar *toolbar)
+{
+        toolbar->priv->plugin->clearSearch();
+}
+
+static void searchNext(EvBrowserPluginToolbar *toolbar)
+{
+        toolbar->priv->plugin->search(EvBrowserPlugin::SearchDirection::Next);
+}
+
+static void searchPrevious(EvBrowserPluginToolbar *toolbar)
+{
+        toolbar->priv->plugin->search(EvBrowserPlugin::SearchDirection::Previous);
+}
+
+static void toggleSearch(EvBrowserPluginToolbar *toolbar)
+{
+        if (!toolbar->priv->searchPopover) {
+                toolbar->priv->searchPopover = gtk_popover_new(toolbar->priv->searchToggleButton);
+                g_signal_connect_swapped(toolbar->priv->searchPopover, "closed", 
G_CALLBACK(searchPopoverClosed), toolbar);
+                GtkWidget *searchBox = ev_search_box_new(toolbar->priv->plugin->model());
+                g_signal_connect_swapped(searchBox, "started", G_CALLBACK(searchStarted), toolbar);
+                g_signal_connect_swapped(searchBox, "cleared", G_CALLBACK(searchCleared), toolbar);
+                g_signal_connect_swapped(searchBox, "next", G_CALLBACK(searchNext), toolbar);
+                g_signal_connect_swapped(searchBox, "previous", G_CALLBACK(searchPrevious), toolbar);
+                gtk_container_add(GTK_CONTAINER(toolbar->priv->searchPopover), searchBox);
+                gtk_widget_show(searchBox);
+        }
+
+        if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(toolbar->priv->searchToggleButton))) {
+                gtk_widget_show(toolbar->priv->searchPopover);
+                toolbar->priv->plugin->setSearchModeEnabled(true);
+
+                GtkSearchEntry *entry = 
ev_search_box_get_entry(EV_SEARCH_BOX(gtk_bin_get_child(GTK_BIN(toolbar->priv->searchPopover))));
+                const char *searchString = gtk_entry_get_text(GTK_ENTRY(entry));
+                if (searchString && searchString[0])
+                        toolbar->priv->plugin->restartSearch();
+        } else {
+                gtk_widget_hide(toolbar->priv->searchPopover);
+                toolbar->priv->plugin->setSearchModeEnabled(false);
+        }
+}
+
 class SignalBlocker {
 public:
         SignalBlocker(gpointer instance, void (* closure)(EvBrowserPluginToolbar *), gpointer data)
@@ -300,6 +357,17 @@ static void evBrowserPluginToolbarConstructed(GObject *object)
         gtk_container_add(GTK_CONTAINER(toolbar), toolItem);
         gtk_widget_show(toolItem);
 
+        // Search.
+        button = createToggleButton(toolbar, "edit-find-symbolic", _("Find a word or phrase in the 
document"),
+                                    false, G_CALLBACK(toggleSearch));
+        toolbar->priv->searchToggleButton = button;
+        toolItem = GTK_WIDGET(gtk_tool_item_new());
+        gtk_container_add(GTK_CONTAINER(toolItem), button);
+        gtk_widget_show(button);
+
+        gtk_container_add(GTK_CONTAINER(toolbar), toolItem);
+        gtk_widget_show(toolItem);
+
         // Separator
         toolItem = GTK_WIDGET(gtk_tool_item_new());
         gtk_tool_item_set_expand(GTK_TOOL_ITEM(toolItem), TRUE);