Add key bindings to the view. Now if the focus would work right...

[evince.git] / shell / ev-view.c

diff --git a/shell/ev-view.c b/shell/ev-view.c
index f52b372778c11d56b31ac5991454292b3405a9fe..3a23cc3ee377c059b5dbb434d6aec701f21e3069 100644 (file)
--- a/shell/ev-view.c
+++ b/shell/ev-view.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */

 /* this file is part of evince, a gnome document viewer
  *
  *  Copyright (C) 2004 Red Hat, Inc
 /* this file is part of evince, a gnome document viewer
  *
  *  Copyright (C) 2004 Red Hat, Inc


@@ -18,9 +19,13 @@
  */
 
 #include <gtk/gtkalignment.h>
  */
 
 #include <gtk/gtkalignment.h>

+#include <glib/gi18n.h>
+#include <gtk/gtkbindings.h>
+#include <gdk/gdkkeysyms.h>

 
 #include "ev-marshal.h"
 #include "ev-view.h"
 
 #include "ev-marshal.h"
 #include "ev-view.h"

+#include "ev-document-find.h"

 
 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
 
 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))


@@ -38,6 +43,13 @@ struct _EvView {
 
        GtkAdjustment *hadjustment;
        GtkAdjustment *vadjustment;
 
        GtkAdjustment *hadjustment;
        GtkAdjustment *vadjustment;

+
+        GArray *find_results;
+       int results_on_this_page;
+       int next_page_with_result;
+       double find_percent_complete;
+
+       double scale;

 };
 
 struct _EvViewClass {
 };
 
 struct _EvViewClass {


@@ -46,8 +58,16 @@ struct _EvViewClass {
        void    (*set_scroll_adjustments) (EvView         *view,
                                           GtkAdjustment  *hadjustment,
                                           GtkAdjustment  *vadjustment);
        void    (*set_scroll_adjustments) (EvView         *view,
                                           GtkAdjustment  *hadjustment,
                                           GtkAdjustment  *vadjustment);

+       void    (*scroll_view)            (EvView         *view,
+                                          GtkScrollType   scroll,
+                                          gboolean        horizontal);
+       
+       /* Should this be notify::page? */
+       void    (*page_changed)           (EvView         *view);

 };
 
 };
 

+static guint page_changed_signal = 0;
+

 static void ev_view_set_scroll_adjustments (EvView         *view,
                                            GtkAdjustment  *hadjustment,
                                            GtkAdjustment  *vadjustment);
 static void ev_view_set_scroll_adjustments (EvView         *view,
                                            GtkAdjustment  *hadjustment,
                                            GtkAdjustment  *vadjustment);


@@ -130,6 +150,9 @@ ev_view_finalize (GObject *object)
 
        ev_view_set_scroll_adjustments (view, NULL, NULL);
 
 
        ev_view_set_scroll_adjustments (view, NULL, NULL);
 

+        g_array_free (view->find_results, TRUE);
+        view->find_results = NULL;
+        

        G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
 }
 
        G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
 }
 


@@ -222,7 +245,9 @@ ev_view_realize (GtkWidget *widget)
        attributes.y = 0;
        attributes.width = MAX (widget->allocation.width, widget->requisition.width);
        attributes.height = MAX (widget->allocation.height, widget->requisition.height);
        attributes.y = 0;
        attributes.width = MAX (widget->allocation.width, widget->requisition.width);
        attributes.height = MAX (widget->allocation.height, widget->requisition.height);

-       attributes.event_mask = GDK_EXPOSURE_MASK;
+       attributes.event_mask = GDK_EXPOSURE_MASK |
+                               GDK_SCROLL_MASK |
+                               GDK_KEY_PRESS_MASK;

   
        view->bin_window = gdk_window_new (widget->window,
                                           &attributes,
   
        view->bin_window = gdk_window_new (widget->window,
                                           &attributes,


@@ -280,11 +305,39 @@ expose_bin_window (GtkWidget      *widget,
                   GdkEventExpose *event)
 {
        EvView *view = EV_VIEW (widget);
                   GdkEventExpose *event)
 {
        EvView *view = EV_VIEW (widget);

+        int i;
+       int current_page;
+        const EvFindResult *results;
+
+       if (view->document == NULL)
+               return;

        
        

-       if (view->document)
-               ev_document_render (view->document,
-                                   event->area.x, event->area.y,
-                                   event->area.width, event->area.height);
+       ev_document_render (view->document,
+                           event->area.x, event->area.y,
+                           event->area.width, event->area.height);
+
+        results = (EvFindResult*) view->find_results->data;
+       current_page = ev_document_get_page (view->document);
+        i = 0;
+        while (i < view->find_results->len) {
+#if 0
+                g_printerr ("highlighting result %d page %d at %d,%d %dx%d\n",
+                            i, results[i].page_num,
+                            results[i].highlight_area.x,
+                            results[i].highlight_area.y,
+                            results[i].highlight_area.width,
+                            results[i].highlight_area.height);
+#endif
+               if (results[i].page_num == current_page)
+                       gdk_draw_rectangle (view->bin_window,
+                                           widget->style->base_gc[GTK_STATE_SELECTED],
+                                           FALSE,
+                                           results[i].highlight_area.x,
+                                           results[i].highlight_area.y,
+                                           results[i].highlight_area.width,
+                                           results[i].highlight_area.height);
+                ++i;
+        }

 }
 
 static gboolean
 }
 
 static gboolean


@@ -299,7 +352,6 @@ ev_view_expose_event (GtkWidget      *widget,
                return GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event (widget, event);
 
        return FALSE;
                return GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event (widget, event);
 
        return FALSE;

-  

 }
 
 static gboolean
 }
 
 static gboolean


@@ -378,12 +430,69 @@ ev_view_set_scroll_adjustments (EvView *view,
        view_update_adjustments (view);
 }
 
        view_update_adjustments (view);
 }
 

+static void
+add_scroll_binding (GtkBindingSet  *binding_set,
+                   guint           keyval,
+                   GtkScrollType   scroll,
+                   gboolean        horizontal)
+{
+  guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
+  
+  gtk_binding_entry_add_signal (binding_set, keyval, 0,
+                                "scroll_view", 2,
+                                GTK_TYPE_SCROLL_TYPE, scroll,
+                               G_TYPE_BOOLEAN, horizontal);
+  gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
+                                "scroll_view", 2,
+                                GTK_TYPE_SCROLL_TYPE, scroll,
+                               G_TYPE_BOOLEAN, horizontal);
+}
+
+static void
+ev_view_scroll_view (EvView *view,
+                     GtkScrollType scroll,
+                     gboolean horizontal)
+{
+       GtkAdjustment *adjustment;
+       double value;
+
+       if (horizontal) {
+               adjustment = view->hadjustment; 
+       } else {
+               adjustment = view->vadjustment;
+       }
+
+       value = adjustment->value;
+
+       switch (scroll) {
+               case GTK_SCROLL_STEP_BACKWARD:  
+                       value -= adjustment->step_increment; 
+                       break;
+               case GTK_SCROLL_STEP_FORWARD:
+                       value += adjustment->step_increment; 
+                       break;
+               case GTK_SCROLL_PAGE_BACKWARD:  
+                       value -= adjustment->page_increment; 
+                       break;
+               case GTK_SCROLL_PAGE_FORWARD:
+                       value += adjustment->page_increment; 
+                       break;
+               default:
+                       break;
+       }
+
+       value = CLAMP (value, adjustment->lower, adjustment->upper - adjustment->page_size);
+
+       gtk_adjustment_set_value (adjustment, value);
+}
+

 static void
 ev_view_class_init (EvViewClass *class)
 {
        GObjectClass *object_class = G_OBJECT_CLASS (class);
        GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
        GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
 static void
 ev_view_class_init (EvViewClass *class)
 {
        GObjectClass *object_class = G_OBJECT_CLASS (class);
        GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
        GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);

+       GtkBindingSet *binding_set;

 
        object_class->finalize = ev_view_finalize;
 
 
        object_class->finalize = ev_view_finalize;
 


@@ -398,8 +507,9 @@ ev_view_class_init (EvViewClass *class)
        widget_class->style_set = ev_view_style_set;
        widget_class->state_changed = ev_view_state_changed;
        gtk_object_class->destroy = ev_view_destroy;
        widget_class->style_set = ev_view_style_set;
        widget_class->state_changed = ev_view_state_changed;
        gtk_object_class->destroy = ev_view_destroy;

-  
+

        class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
        class->set_scroll_adjustments = ev_view_set_scroll_adjustments;

+       class->scroll_view = ev_view_scroll_view;

 
        widget_class->set_scroll_adjustments_signal =  g_signal_new ("set-scroll-adjustments",
                                                                     G_OBJECT_CLASS_TYPE (object_class),
 
        widget_class->set_scroll_adjustments_signal =  g_signal_new ("set-scroll-adjustments",
                                                                     G_OBJECT_CLASS_TYPE (object_class),


@@ -410,14 +520,159 @@ ev_view_class_init (EvViewClass *class)
                                                                     G_TYPE_NONE, 2,
                                                                     GTK_TYPE_ADJUSTMENT,
                                                                     GTK_TYPE_ADJUSTMENT);
                                                                     G_TYPE_NONE, 2,
                                                                     GTK_TYPE_ADJUSTMENT,
                                                                     GTK_TYPE_ADJUSTMENT);

+       page_changed_signal = g_signal_new ("page-changed",
+                                           G_OBJECT_CLASS_TYPE (object_class),
+                                           G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+                                           G_STRUCT_OFFSET (EvViewClass, page_changed),
+                                           NULL, NULL,
+                                           ev_marshal_VOID__NONE,
+                                           G_TYPE_NONE, 0);
+
+       g_signal_new ("find-status-changed",
+                     G_OBJECT_CLASS_TYPE (object_class),
+                     G_SIGNAL_RUN_LAST,
+                     0,
+                     NULL, NULL,
+                     ev_marshal_VOID__NONE,
+                     G_TYPE_NONE, 0);
+
+       g_signal_new ("scroll_view",
+                     G_TYPE_FROM_CLASS (object_class),
+                     G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+                     G_STRUCT_OFFSET (EvViewClass, scroll_view),
+                     NULL, NULL,
+                     ev_marshal_VOID__ENUM_BOOLEAN,
+                     G_TYPE_NONE, 2,
+                     GTK_TYPE_SCROLL_TYPE,
+                     G_TYPE_BOOLEAN);
+
+       binding_set = gtk_binding_set_by_class (class);
+
+       add_scroll_binding (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
+       add_scroll_binding (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
+       add_scroll_binding (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
+       add_scroll_binding (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
+
+       add_scroll_binding (binding_set, GDK_Page_Up,   GTK_SCROLL_PAGE_BACKWARD, FALSE);
+       add_scroll_binding (binding_set, GDK_Page_Down, GTK_SCROLL_PAGE_FORWARD,  FALSE);

 }
 
 static void
 ev_view_init (EvView *view)
 {
        static const GdkColor white = { 0, 0xffff, 0xffff, 0xffff };
 }
 
 static void
 ev_view_init (EvView *view)
 {
        static const GdkColor white = { 0, 0xffff, 0xffff, 0xffff };

+
+       GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
+
+       view->scale = 1.0;

        
        gtk_widget_modify_bg (GTK_WIDGET (view), GTK_STATE_NORMAL, &white);
        
        gtk_widget_modify_bg (GTK_WIDGET (view), GTK_STATE_NORMAL, &white);

+
+        view->find_results = g_array_new (FALSE,
+                                          FALSE,
+                                          sizeof (EvFindResult));
+       view->results_on_this_page = 0;
+       view->next_page_with_result = 0;
+}
+
+static void
+update_find_results (EvView *view)
+{
+       const EvFindResult *results;
+       int i;
+       int on_this_page;
+       int next_page_with_result;
+       int earliest_page_with_result;
+       int current_page;
+       gboolean counts_changed;
+       
+       results = (EvFindResult*) view->find_results->data;
+       current_page = ev_document_get_page (view->document);
+       next_page_with_result = 0;
+       on_this_page = 0;
+       earliest_page_with_result = 0;
+       
+       i = 0;
+       while (i < view->find_results->len) {
+               if (results[i].page_num == current_page) {
+                       ++on_this_page;
+               } else {
+                       int delta = results[i].page_num - current_page;
+                       
+                       if (delta > 0 && /* result on later page */
+                           (next_page_with_result == 0 ||
+                            results[i].page_num < next_page_with_result))
+                               next_page_with_result = results[i].page_num;
+
+                       if (delta < 0 && /* result on a previous page */
+                           (earliest_page_with_result == 0 ||
+                            results[i].page_num < earliest_page_with_result))
+                               earliest_page_with_result = results[i].page_num;
+               }
+               ++i;
+       }
+
+       /* If earliest page is just the current page, there is no earliest page */
+       if (earliest_page_with_result == current_page)
+               earliest_page_with_result = 0;
+       
+       /* If no next page, then wrap and the wrapped page is the next page */
+       if (next_page_with_result == 0)
+               next_page_with_result = earliest_page_with_result;
+
+       counts_changed = FALSE;
+       if (on_this_page != view->results_on_this_page ||
+           next_page_with_result != view->next_page_with_result) {
+               view->results_on_this_page = on_this_page;
+               view->next_page_with_result = next_page_with_result;
+               counts_changed = TRUE;
+       }
+
+       /* If there are no results at all, then the
+        * results of ev_view_get_find_status_message() will change
+        * to reflect the percent_complete so we have to emit the signal
+        */
+       if (counts_changed ||
+           view->find_results->len == 0) {
+               g_signal_emit_by_name (view,
+                                      "find-status-changed");
+       }
+}
+
+static void
+found_results_callback (EvDocument         *document,
+                        const EvFindResult *results,
+                        int                 n_results,
+                        double              percent_complete,
+                        void               *data)
+{
+  EvView *view = EV_VIEW (data);
+  
+  g_array_set_size (view->find_results, 0);
+
+  if (n_results > 0)
+          g_array_append_vals (view->find_results,
+                               results, n_results);
+
+#if 0
+  {
+         int i;
+
+         g_printerr ("%d results %d%%: ", n_results,
+                     (int) (percent_complete * 100));
+         i = 0;
+         while (i < n_results) {
+                 g_printerr ("%d ", results[i].page_num);
+                 ++i;
+         }
+         g_printerr ("\n");
+  }
+#endif
+
+  view->find_percent_complete = percent_complete;
+  update_find_results (view);
+  
+  gtk_widget_queue_draw (GTK_WIDGET (view));

 }
 
 /*** Public API ***/       
 }
 
 /*** Public API ***/       


@@ -428,6 +683,13 @@ ev_view_new (void)
        return g_object_new (EV_TYPE_VIEW, NULL);
 }
 
        return g_object_new (EV_TYPE_VIEW, NULL);
 }
 

+static void
+document_changed_callback (EvDocument *document,
+                          EvView     *view)
+{
+       gtk_widget_queue_draw (GTK_WIDGET (view));
+}
+

 void
 ev_view_set_document (EvView     *view,
                      EvDocument *document)
 void
 ev_view_set_document (EvView     *view,
                      EvDocument *document)


@@ -435,17 +697,166 @@ ev_view_set_document (EvView     *view,
        g_return_if_fail (EV_IS_VIEW (view));
 
        if (document != view->document) {
        g_return_if_fail (EV_IS_VIEW (view));
 
        if (document != view->document) {

-               if (view->document)
+               int old_page = ev_view_get_page (view);
+               
+               if (view->document) {
+                        g_signal_handlers_disconnect_by_func (view->document,
+                                                              found_results_callback,
+                                                              view);
+                        g_array_set_size (view->find_results, 0);
+                       view->results_on_this_page = 0;
+                       view->next_page_with_result = 0;
+

                        g_object_unref (view->document);
                        g_object_unref (view->document);

+                }

 
                view->document = document;
 
 
                view->document = document;
 

-               if (view->document)
+               if (view->document) {

                        g_object_ref (view->document);
                        g_object_ref (view->document);

+                        g_signal_connect (view->document,
+                                          "found",
+                                          G_CALLBACK (found_results_callback),
+                                          view);
+                       g_signal_connect (view->document,
+                                         "changed",
+                                         G_CALLBACK (document_changed_callback),
+                                         view);
+                }

 
                if (GTK_WIDGET_REALIZED (view))
                        ev_document_set_target (view->document, view->bin_window);
                
                gtk_widget_queue_resize (GTK_WIDGET (view));
 
                if (GTK_WIDGET_REALIZED (view))
                        ev_document_set_target (view->document, view->bin_window);
                
                gtk_widget_queue_resize (GTK_WIDGET (view));

+               
+               if (old_page != ev_view_get_page (view))
+                       g_signal_emit (view, page_changed_signal, 0);
+       }
+}
+
+void
+ev_view_set_page (EvView *view,
+                 int     page)
+{
+       if (view->document) {
+               int old_page = ev_document_get_page (view->document);
+               if (old_page != page)
+                       ev_document_set_page (view->document, page);
+               if (old_page != ev_document_get_page (view->document)) {
+                       g_signal_emit (view, page_changed_signal, 0);
+
+                       view->find_percent_complete = 0.0;
+                       update_find_results (view);     
+               }
+       }
+}
+
+int
+ev_view_get_page (EvView *view)
+{
+       if (view->document)
+               return ev_document_get_page (view->document);
+       else
+               return 1;
+}
+
+#define ZOOM_IN_FACTOR  1.2
+#define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
+
+#define MIN_SCALE 0.05409
+#define MAX_SCALE 18.4884
+
+static void
+ev_view_zoom (EvView   *view,
+             double    factor,
+             gboolean  relative)
+{
+       double scale;
+
+       if (relative)
+               scale = view->scale * factor;
+       else
+               scale = factor;
+
+       view->scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
+
+       ev_document_set_scale (view->document, view->scale);
+
+       gtk_widget_queue_draw (GTK_WIDGET (view));
+}
+
+void
+ev_view_zoom_in (EvView *view)
+{
+       ev_view_zoom (view, ZOOM_IN_FACTOR, TRUE);
+}
+
+void
+ev_view_zoom_out (EvView *view)
+{
+       ev_view_zoom (view, ZOOM_OUT_FACTOR, TRUE);
+}
+
+void
+ev_view_normal_size (EvView *view)
+{
+       ev_view_zoom (view, 1.0, FALSE);
+}
+
+void
+ev_view_best_fit (EvView *view)
+{
+       double scale;
+       int width, height;
+
+       width = height = 0;
+       ev_document_get_page_size (view->document, &width, &height);
+
+       scale = 1.0;
+       if (width != 0 && height != 0) {
+               double scale_w, scale_h;
+
+               scale_w = (double)GTK_WIDGET (view)->allocation.width * view->scale / width;
+               scale_h = (double)GTK_WIDGET (view)->allocation.height * view->scale / height;
+
+               scale = (scale_w < scale_h) ? scale_w : scale_h;
+       }
+
+       ev_view_zoom (view, scale, FALSE);
+}
+
+void
+ev_view_fit_width (EvView *view)
+{
+       double scale = 1.0;
+       int width;
+
+       width = 0;
+       ev_document_get_page_size (view->document, &width, NULL);
+
+       scale = 1.0;
+       if (width != 0)
+               scale = (double)GTK_WIDGET (view)->allocation.width * view->scale / width;
+
+       ev_view_zoom (view, scale, FALSE);
+}
+
+char*
+ev_view_get_find_status_message (EvView *view)
+{
+       if (view->find_results->len == 0) {
+               if (view->find_percent_complete >= (1.0 - 1e-10)) {
+                       return g_strdup (_("Not found"));
+               } else {
+                       return g_strdup_printf (_("%3d%% remaining to search"),
+                                               (int) ((1.0 - view->find_percent_complete) * 100));
+               }
+       } else if (view->results_on_this_page == 0) {
+               g_assert (view->next_page_with_result != 0);
+               return g_strdup_printf (_("Found on page %d"),
+                                       view->next_page_with_result);
+       } else {
+               return g_strdup_printf (_("%d found on this page"),
+                                       view->results_on_this_page);

        }
 }
        }
 }