/* -*- 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 * * Evince is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * Evince is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. */ #include #include #include #include #include #include #include #include "ev-marshal.h" #include "ev-view.h" #include "ev-document-find.h" #include "ev-debug.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_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass)) enum { PROP_0, PROP_STATUS, PROP_FIND_STATUS }; enum { TARGET_STRING, TARGET_TEXT, TARGET_COMPOUND_TEXT, TARGET_UTF8_STRING, TARGET_TEXT_BUFFER_CONTENTS }; static const GtkTargetEntry targets[] = { { "STRING", 0, TARGET_STRING }, { "TEXT", 0, TARGET_TEXT }, { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT }, { "UTF8_STRING", 0, TARGET_UTF8_STRING }, }; typedef enum { EV_VIEW_CURSOR_NORMAL, EV_VIEW_CURSOR_LINK, EV_VIEW_CURSOR_WAIT } EvViewCursor; struct _EvView { GtkWidget parent_instance; EvDocument *document; GdkWindow *bin_window; char *status; char *find_status; int scroll_x; int scroll_y; gboolean pressed_button; gboolean has_selection; GdkPoint selection_start; GdkRectangle selection; EvViewCursor cursor; GtkAdjustment *hadjustment; GtkAdjustment *vadjustment; int find_page; int find_result; double scale; }; struct _EvViewClass { GtkWidgetClass parent_class; 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); G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET) /*** Helper functions ***/ static void view_update_adjustments (EvView *view) { int old_x = view->scroll_x; int old_y = view->scroll_y; if (view->hadjustment) view->scroll_x = view->hadjustment->value; else view->scroll_x = 0; if (view->vadjustment) view->scroll_y = view->vadjustment->value; else view->scroll_y = 0; if (GTK_WIDGET_REALIZED (view) && (view->scroll_x != old_x || view->scroll_y != old_y)) { gdk_window_move (view->bin_window, - view->scroll_x, - view->scroll_y); gdk_window_process_updates (view->bin_window, TRUE); } } static void view_set_adjustment_values (EvView *view, GtkOrientation orientation) { GtkWidget *widget = GTK_WIDGET (view); GtkAdjustment *adjustment; gboolean value_changed = FALSE; int requisition; int allocation; if (orientation == GTK_ORIENTATION_HORIZONTAL) { requisition = widget->requisition.width; allocation = widget->allocation.width; adjustment = view->hadjustment; } else { requisition = widget->requisition.height; allocation = widget->allocation.height; adjustment = view->vadjustment; } if (!adjustment) return; adjustment->page_size = allocation; adjustment->step_increment = allocation * 0.1; adjustment->page_increment = allocation * 0.9; adjustment->lower = 0; adjustment->upper = MAX (allocation, requisition); if (adjustment->value > adjustment->upper - adjustment->page_size) { adjustment->value = adjustment->upper - adjustment->page_size; value_changed = TRUE; } gtk_adjustment_changed (adjustment); if (value_changed) gtk_adjustment_value_changed (adjustment); } /*** Virtual function implementations ***/ static void ev_view_finalize (GObject *object) { EvView *view = EV_VIEW (object); if (view->document) g_object_unref (view->document); ev_view_set_scroll_adjustments (view, NULL, NULL); G_OBJECT_CLASS (ev_view_parent_class)->finalize (object); } static void ev_view_destroy (GtkObject *object) { EvView *view = EV_VIEW (object); ev_view_set_scroll_adjustments (view, NULL, NULL); GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object); } static void ev_view_size_request (GtkWidget *widget, GtkRequisition *requisition) { EvView *view = EV_VIEW (widget); if (GTK_WIDGET_REALIZED (widget)) { if (view->document) { ev_document_get_page_size (view->document, -1, &requisition->width, &requisition->height); } else { requisition->width = 10; requisition->height = 10; } requisition->width += 2; requisition->height += 2; } } static void ev_view_size_allocate (GtkWidget *widget, GtkAllocation *allocation) { EvView *view = EV_VIEW (widget); GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation); view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL); view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL); if (GTK_WIDGET_REALIZED (widget)) { gdk_window_resize (view->bin_window, MAX (widget->allocation.width, widget->requisition.width), MAX (widget->allocation.height, widget->requisition.height)); } } static void ev_view_realize (GtkWidget *widget) { EvView *view = EV_VIEW (widget); GdkWindowAttr attributes; GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED); attributes.window_type = GDK_WINDOW_CHILD; attributes.wclass = GDK_INPUT_OUTPUT; attributes.visual = gtk_widget_get_visual (widget); attributes.colormap = gtk_widget_get_colormap (widget); attributes.x = widget->allocation.x; attributes.y = widget->allocation.y; attributes.width = widget->allocation.width; attributes.height = widget->allocation.height; attributes.event_mask = 0; widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, GDK_WA_X | GDK_WA_Y | GDK_WA_COLORMAP | GDK_WA_VISUAL); gdk_window_set_user_data (widget->window, widget); widget->style = gtk_style_attach (widget->style, widget->window); attributes.x = 0; 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 | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_SCROLL_MASK | GDK_KEY_PRESS_MASK | GDK_POINTER_MOTION_MASK; view->bin_window = gdk_window_new (widget->window, &attributes, GDK_WA_X | GDK_WA_Y | GDK_WA_COLORMAP | GDK_WA_VISUAL); gdk_window_set_user_data (view->bin_window, widget); gdk_window_show (view->bin_window); widget->style = gtk_style_attach (widget->style, view->bin_window); gdk_window_set_background (view->bin_window, &widget->style->mid[widget->state]); if (view->document) { ev_document_set_target (view->document, view->bin_window); /* We can't get page size without a target, so we have to * queue a size request at realization. Could be fixed * with EvDocument changes to allow setting a GdkScreen * without setting a target. */ gtk_widget_queue_resize (widget); } } static void ev_view_unrealize (GtkWidget *widget) { EvView *view = EV_VIEW (widget); if (view->document) ev_document_set_target (view->document, NULL); gdk_window_set_user_data (view->bin_window, NULL); gdk_window_destroy (view->bin_window); view->bin_window = NULL; GTK_WIDGET_CLASS (ev_view_parent_class)->unrealize (widget); } static guint32 ev_gdk_color_to_rgb (const GdkColor *color) { guint32 result; result = (0xff0000 | (color->red & 0xff00)); result <<= 8; result |= ((color->green & 0xff00) | (color->blue >> 8)); return result; } static void draw_rubberband (GtkWidget *widget, GdkWindow *window, const GdkRectangle *rect, guchar alpha) { GdkGC *gc; GdkPixbuf *pixbuf; GdkColor *fill_color_gdk; guint fill_color; fill_color_gdk = gdk_color_copy (>K_WIDGET (widget)->style->base[GTK_STATE_SELECTED]); fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha; pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, rect->width, rect->height); gdk_pixbuf_fill (pixbuf, fill_color); gdk_draw_pixbuf (window, NULL, pixbuf, 0, 0, rect->x,rect->y, rect->width, rect->height, GDK_RGB_DITHER_NONE, 0, 0); g_object_unref (pixbuf); gc = gdk_gc_new (window); gdk_gc_set_rgb_fg_color (gc, fill_color_gdk); gdk_draw_rectangle (window, gc, FALSE, rect->x, rect->y, rect->width - 1, rect->height - 1); g_object_unref (gc); gdk_color_free (fill_color_gdk); } static void highlight_find_results (EvView *view) { EvDocumentFind *find = EV_DOCUMENT_FIND (view->document); int i, results; results = ev_document_find_get_n_results (find); for (i = 0; i < results; i++) { GdkRectangle rectangle; guchar alpha; alpha = (i == view->find_result) ? 0x90 : 0x20; ev_document_find_get_result (find, i, &rectangle); draw_rubberband (GTK_WIDGET (view), view->bin_window, &rectangle, alpha); } } static void expose_bin_window (GtkWidget *widget, GdkEventExpose *event) { EvView *view = EV_VIEW (widget); int x_offset, y_offset; if (view->document == NULL) return; x_offset = MAX (0, (widget->allocation.width - widget->requisition.width) / 2); y_offset = MAX (0, (widget->allocation.height - widget->requisition.height) / 2); gdk_draw_rectangle (view->bin_window, widget->style->black_gc, FALSE, x_offset, y_offset, widget->requisition.width - 1, widget->requisition.height - 1); ev_document_set_page_offset (view->document, x_offset + 1, y_offset + 1); LOG ("Render area %d %d %d %d", 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); if (EV_IS_DOCUMENT_FIND (view->document)) { highlight_find_results (view); } if (view->has_selection) { draw_rubberband (widget, view->bin_window, &view->selection, 0x40); } } static gboolean ev_view_expose_event (GtkWidget *widget, GdkEventExpose *event) { EvView *view = EV_VIEW (widget); if (event->window == view->bin_window) expose_bin_window (widget, event); else return GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event (widget, event); return FALSE; } void ev_view_select_all (EvView *ev_view) { GtkWidget *widget = GTK_WIDGET (ev_view); g_return_if_fail (EV_IS_VIEW (ev_view)); ev_view->has_selection = TRUE; ev_view->selection.x = ev_view->selection.y = 0; ev_view->selection.width = widget->requisition.width; ev_view->selection.height = widget->requisition.height; gtk_widget_queue_draw (widget); } void ev_view_copy (EvView *ev_view) { GtkClipboard *clipboard; char *text; text = ev_document_get_text (ev_view->document, &ev_view->selection); clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view), GDK_SELECTION_CLIPBOARD); gtk_clipboard_set_text (clipboard, text, -1); g_free (text); } static void ev_view_primary_get_cb (GtkClipboard *clipboard, GtkSelectionData *selection_data, guint info, gpointer data) { EvView *ev_view = EV_VIEW (data); char *text; text = ev_document_get_text (ev_view->document, &ev_view->selection); gtk_selection_data_set_text (selection_data, text, -1); } static void ev_view_primary_clear_cb (GtkClipboard *clipboard, gpointer data) { EvView *ev_view = EV_VIEW (data); ev_view->has_selection = FALSE; } static void ev_view_update_primary_selection (EvView *ev_view) { GtkClipboard *clipboard; clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view), GDK_SELECTION_PRIMARY); if (ev_view->has_selection) { if (!gtk_clipboard_set_with_owner (clipboard, targets, G_N_ELEMENTS (targets), ev_view_primary_get_cb, ev_view_primary_clear_cb, G_OBJECT (ev_view))) ev_view_primary_clear_cb (clipboard, ev_view); } else { if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view)) gtk_clipboard_clear (clipboard); } } static gboolean ev_view_button_press_event (GtkWidget *widget, GdkEventButton *event) { EvView *view = EV_VIEW (widget); if (!GTK_WIDGET_HAS_FOCUS (widget)) { gtk_widget_grab_focus (widget); } view->pressed_button = event->button; switch (event->button) { case 1: if (view->has_selection) { view->has_selection = FALSE; gtk_widget_queue_draw (widget); } view->selection_start.x = event->x; view->selection_start.y = event->y; break; } return TRUE; } static char * status_message_from_link (EvLink *link) { EvLinkType type; char *msg; int page; type = ev_link_get_link_type (link); switch (type) { case EV_LINK_TYPE_TITLE: msg = g_strdup (ev_link_get_title (link)); break; case EV_LINK_TYPE_PAGE: page = ev_link_get_page (link); msg = g_strdup_printf (_("Go to page %d"), page); break; case EV_LINK_TYPE_EXTERNAL_URI: msg = g_strdup (ev_link_get_uri (link)); break; default: msg = NULL; } return msg; } static void ev_view_set_status (EvView *view, const char *message) { g_return_if_fail (EV_IS_VIEW (view)); if (message != view->status) { g_free (view->status); view->status = g_strdup (message); g_object_notify (G_OBJECT (view), "status"); } } static void ev_view_set_find_status (EvView *view, const char *message) { g_return_if_fail (EV_IS_VIEW (view)); g_free (view->find_status); view->find_status = g_strdup (message); g_object_notify (G_OBJECT (view), "find-status"); } static void ev_view_set_cursor (EvView *view, EvViewCursor new_cursor) { GdkCursor *cursor = NULL; GdkDisplay *display; GtkWidget *widget; if (view->cursor == new_cursor) { return; } widget = gtk_widget_get_toplevel (GTK_WIDGET (view)); display = gtk_widget_get_display (widget); view->cursor = new_cursor; switch (new_cursor) { case EV_VIEW_CURSOR_NORMAL: gdk_window_set_cursor (widget->window, NULL); break; case EV_VIEW_CURSOR_LINK: cursor = gdk_cursor_new_for_display (display, GDK_HAND2); break; case EV_VIEW_CURSOR_WAIT: cursor = gdk_cursor_new_for_display (display, GDK_WATCH); break; } if (cursor) { gdk_window_set_cursor (widget->window, cursor); gdk_cursor_unref (cursor); gdk_flush(); } } static gboolean ev_view_motion_notify_event (GtkWidget *widget, GdkEventMotion *event) { EvView *view = EV_VIEW (widget); if (view->pressed_button > 0) { view->has_selection = TRUE; view->selection.x = MIN (view->selection_start.x, event->x); view->selection.y = MIN (view->selection_start.y, event->y); view->selection.width = ABS (view->selection_start.x - event->x) + 1; view->selection.height = ABS (view->selection_start.y - event->y) + 1; gtk_widget_queue_draw (widget); } else if (view->document) { EvLink *link; link = ev_document_get_link (view->document, event->x, event->y); if (link) { char *msg; msg = status_message_from_link (link); ev_view_set_status (view, msg); ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK); g_free (msg); g_object_unref (link); } else { ev_view_set_status (view, NULL); if (view->cursor == EV_VIEW_CURSOR_LINK) { ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL); } } } return TRUE; } static gboolean ev_view_button_release_event (GtkWidget *widget, GdkEventButton *event) { EvView *view = EV_VIEW (widget); view->pressed_button = -1; if (view->has_selection) { ev_view_update_primary_selection (view); } else if (view->document) { EvLink *link; link = ev_document_get_link (view->document, event->x, event->y); if (link) { ev_view_go_to_link (view, link); g_object_unref (link); } } return FALSE; } static void on_adjustment_value_changed (GtkAdjustment *adjustment, EvView *view) { view_update_adjustments (view); } static void set_scroll_adjustment (EvView *view, GtkOrientation orientation, GtkAdjustment *adjustment) { GtkAdjustment **to_set; if (orientation == GTK_ORIENTATION_HORIZONTAL) to_set = &view->hadjustment; else to_set = &view->vadjustment; if (*to_set != adjustment) { if (*to_set) { g_signal_handlers_disconnect_by_func (*to_set, (gpointer) on_adjustment_value_changed, view); g_object_unref (*to_set); } *to_set = adjustment; view_set_adjustment_values (view, orientation); if (*to_set) { g_object_ref (*to_set); g_signal_connect (*to_set, "value_changed", G_CALLBACK (on_adjustment_value_changed), view); } } } static void ev_view_set_scroll_adjustments (EvView *view, GtkAdjustment *hadjustment, GtkAdjustment *vadjustment) { set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment); set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment); 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) { if (scroll == GTK_SCROLL_PAGE_BACKWARD) { ev_view_set_page (view, ev_view_get_page (view) - 1); } else if (scroll == GTK_SCROLL_PAGE_FORWARD) { ev_view_set_page (view, ev_view_get_page (view) + 1); } else { 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; default: break; } value = CLAMP (value, adjustment->lower, adjustment->upper - adjustment->page_size); gtk_adjustment_set_value (adjustment, value); } } static void ev_view_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { switch (prop_id) { /* Read only */ case PROP_STATUS: case PROP_FIND_STATUS: break; } } static void ev_view_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { EvView *view = EV_VIEW (object); switch (prop_id) { case PROP_STATUS: g_value_set_string (value, view->status); break; case PROP_FIND_STATUS: g_value_set_string (value, view->status); break; } } 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->set_property = ev_view_set_property; object_class->get_property = ev_view_get_property; widget_class->expose_event = ev_view_expose_event; widget_class->button_press_event = ev_view_button_press_event; widget_class->motion_notify_event = ev_view_motion_notify_event; widget_class->button_release_event = ev_view_button_release_event; widget_class->size_request = ev_view_size_request; widget_class->size_allocate = ev_view_size_allocate; widget_class->realize = ev_view_realize; widget_class->unrealize = ev_view_unrealize; gtk_object_class->destroy = ev_view_destroy; 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), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments), NULL, NULL, ev_marshal_VOID__OBJECT_OBJECT, 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 ("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); g_object_class_install_property (object_class, PROP_STATUS, g_param_spec_string ("status", "Status Message", "The status message", NULL, G_PARAM_READABLE)); g_object_class_install_property (object_class, PROP_STATUS, g_param_spec_string ("find-status", "Find Status Message", "The find status message", NULL, G_PARAM_READABLE)); 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) { GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS); view->scale = 1.0; view->pressed_button = -1; view->cursor = EV_VIEW_CURSOR_NORMAL; } static void update_find_status_message (EvView *view) { char *message; if (ev_document_get_page (view->document) == view->find_page) { int results; results = ev_document_find_get_n_results (EV_DOCUMENT_FIND (view->document)); message = g_strdup_printf (_("%d found on this page"), results); } else { double percent; percent = ev_document_find_get_progress (EV_DOCUMENT_FIND (view->document)); if (percent >= (1.0 - 1e-10)) { message = g_strdup (_("Not found")); } else { message = g_strdup_printf (_("%3d%% remaining to search"), (int) ((1.0 - percent) * 100)); } } ev_view_set_find_status (view, message); g_free (message); } static void set_document_page (EvView *view, int new_page) { int page; int pages; pages = ev_document_get_n_pages (view->document); page = CLAMP (new_page, 1, pages); if (view->document) { int old_page = ev_document_get_page (view->document); int old_width, old_height; ev_document_get_page_size (view->document, -1, &old_width, &old_height); if (old_page != page) { ev_view_set_cursor (view, EV_VIEW_CURSOR_WAIT); ev_document_set_page (view->document, page); } if (old_page != ev_document_get_page (view->document)) { int width, height; g_signal_emit (view, page_changed_signal, 0); view->has_selection = FALSE; ev_document_get_page_size (view->document, -1, &width, &height); if (width != old_width || height != old_height) gtk_widget_queue_resize (GTK_WIDGET (view)); gtk_adjustment_set_value (view->vadjustment, view->vadjustment->lower); } view->find_page = page; view->find_result = 0; if (EV_IS_DOCUMENT_FIND (view->document)) { update_find_status_message (view); } } } #define MARGIN 5 static void ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect) { GtkWidget *widget = GTK_WIDGET (view); GtkAdjustment *adjustment; int value; adjustment = view->vadjustment; if (rect->y < adjustment->value) { value = MAX (adjustment->lower, rect->y - MARGIN); gtk_adjustment_set_value (view->vadjustment, value); } else if (rect->y + rect->height > adjustment->value + widget->allocation.height) { value = MIN (adjustment->upper, rect->y + rect->height - widget->allocation.height + MARGIN); gtk_adjustment_set_value (view->vadjustment, value); } adjustment = view->hadjustment; if (rect->x < adjustment->value) { value = MAX (adjustment->lower, rect->x - MARGIN); gtk_adjustment_set_value (view->hadjustment, value); } else if (rect->x + rect->height > adjustment->value + widget->allocation.width) { value = MIN (adjustment->upper, rect->x + rect->width - widget->allocation.width + MARGIN); gtk_adjustment_set_value (view->hadjustment, value); } } static void jump_to_find_result (EvView *view) { EvDocumentFind *find = EV_DOCUMENT_FIND (view->document); GdkRectangle rect; int n_results; n_results = ev_document_find_get_n_results (find); if (n_results > view->find_result) { ev_document_find_get_result (find, view->find_result, &rect); ensure_rectangle_is_visible (view, &rect); } } static void jump_to_find_page (EvView *view) { int n_pages, i; n_pages = ev_document_get_n_pages (view->document); for (i = 0; i <= n_pages; i++) { int has_results; int page; page = i + view->find_page; if (page > n_pages) { page = page - n_pages; } has_results = ev_document_find_page_has_results (EV_DOCUMENT_FIND (view->document), page); if (has_results == -1) { view->find_page = page; break; } else if (has_results == 1) { set_document_page (view, page); jump_to_find_result (view); break; } } } static void find_changed_cb (EvDocument *document, int page, EvView *view) { jump_to_find_page (view); jump_to_find_result (view); update_find_status_message (view); if (ev_document_get_page (document) == page) { gtk_widget_queue_draw (GTK_WIDGET (view)); } } static void document_changed_callback (EvDocument *document, EvView *view) { gtk_widget_queue_draw (GTK_WIDGET (view)); ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL); } /*** Public API ***/ GtkWidget* ev_view_new (void) { return g_object_new (EV_TYPE_VIEW, NULL); } void ev_view_set_document (EvView *view, EvDocument *document) { g_return_if_fail (EV_IS_VIEW (view)); if (document != view->document) { if (view->document) { g_signal_handlers_disconnect_by_func (view->document, find_changed_cb, view); g_object_unref (view->document); } view->document = document; view->find_page = 1; view->find_result = 0; if (view->document) { g_object_ref (view->document); if (EV_IS_DOCUMENT_FIND (view->document)) { g_signal_connect (view->document, "find_changed", G_CALLBACK (find_changed_cb), 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)); g_signal_emit (view, page_changed_signal, 0); } } static void go_to_link (EvView *view, EvLink *link) { EvLinkType type; const char *uri; int page; type = ev_link_get_link_type (link); switch (type) { case EV_LINK_TYPE_TITLE: break; case EV_LINK_TYPE_PAGE: page = ev_link_get_page (link); set_document_page (view, page); break; case EV_LINK_TYPE_EXTERNAL_URI: uri = ev_link_get_uri (link); gnome_vfs_url_show (uri); break; } } void ev_view_go_to_link (EvView *view, EvLink *link) { go_to_link (view, link); } void ev_view_set_page (EvView *view, int page) { g_return_if_fail (EV_IS_VIEW (view)); set_document_page (view, page); } 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_resize (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, -1, &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, -1, &width, NULL); scale = 1.0; if (width != 0) scale = (double)GTK_WIDGET (view)->allocation.width * view->scale / width; ev_view_zoom (view, scale, FALSE); } const char * ev_view_get_status (EvView *view) { g_return_val_if_fail (EV_IS_VIEW (view), NULL); return view->status; } const char * ev_view_get_find_status (EvView *view) { g_return_val_if_fail (EV_IS_VIEW (view), NULL); return view->find_status; } void ev_view_find_next (EvView *view) { int n_results, n_pages; EvDocumentFind *find = EV_DOCUMENT_FIND (view->document); n_results = ev_document_find_get_n_results (find); n_pages = ev_document_get_n_pages (view->document); view->find_result++; if (view->find_result >= n_results) { view->find_result = 0; view->find_page++; if (view->find_page > n_pages) { view->find_page = 1; } jump_to_find_page (view); } else { jump_to_find_result (view); gtk_widget_queue_draw (GTK_WIDGET (view)); } } void ev_view_find_previous (EvView *view) { int n_results, n_pages; EvDocumentFind *find = EV_DOCUMENT_FIND (view->document); n_results = ev_document_find_get_n_results (find); n_pages = ev_document_get_n_pages (view->document); view->find_result--; if (view->find_result < 0) { view->find_result = 0; view->find_page--; if (view->find_page < 1) { view->find_page = n_pages; } jump_to_find_page (view); } else { jump_to_find_result (view); gtk_widget_queue_draw (GTK_WIDGET (view)); } }