/* Claws Mail -- a GTK+ based, lightweight, and fast e-mail client * Copyright (C) 2007-2012 Holger Berndt , * Colin Leroy , and the Claws Mail team * * This program 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 3 of the License, or * (at your option) any later version. * * This program 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, see . * */ #ifdef HAVE_CONFIG_H # include "config.h" #include "claws-features.h" #endif #include "defs.h" #include "printing.h" #include "image_viewer.h" #include "gtkutils.h" #include "toolbar.h" #include "prefs_common.h" #include #include #include #include #include #include struct _PrintData { PrintRenderer *renderer; gpointer renderer_data; PangoLayout *layout; PangoContext *pango_context; gpointer to_print; GList *page_breaks; guint npages; gint sel_start; gint sel_end; GHashTable *images; gint img_cnt; gdouble zoom; gdouble ypos_line; GtkImage *avatar; }; typedef struct { GtkPrintOperation *op; GtkPrintOperationPreview *preview; GtkWidget *dialog; GtkWidget *scrolled_window; GtkWidget *area; PrintData *print_data; GtkWidget *page_nr_label; GList *pages_to_print; GList *current_page; GtkWidget *first; GtkWidget *next; GtkWidget *previous; GtkWidget *last; GtkWidget *close; GtkWidget *zoom_100; GtkWidget *zoom_fit; GtkWidget *zoom_in; GtkWidget *zoom_out; gboolean rendering; gint page_width; gint page_height; GtkPrintContext *context; } PreviewData; /* callbacks */ static void printing_textview_cb_begin_print(GtkPrintOperation*, GtkPrintContext*, gpointer); static void printing_textview_cb_draw_page(GtkPrintOperation*, GtkPrintContext*, gint, gpointer); static gboolean cb_preview(GtkPrintOperation*, GtkPrintOperationPreview*, GtkPrintContext*, GtkWindow*, gpointer); static void cb_preview_destroy(GtkWindow*, gpointer); static gboolean cb_preview_close(GtkWidget*, GdkEventAny*, gpointer); static void cb_preview_size_allocate(GtkWidget*, GtkAllocation*); static void cb_preview_ready(GtkPrintOperationPreview*, GtkPrintContext*, gpointer); static gboolean cb_preview_expose(GtkWidget*, GdkEventExpose*, gpointer); static void cb_preview_got_page_size(GtkPrintOperationPreview*, GtkPrintContext*, GtkPageSetup*, gpointer); static void cb_preview_go_first(GtkButton*, gpointer); static void cb_preview_go_previous(GtkButton*, gpointer); static void cb_preview_go_next(GtkButton*, gpointer); static void cb_preview_go_last(GtkButton*, gpointer); static void cb_preview_btn_close(GtkButton*, gpointer); static void cb_preview_zoom_100(GtkButton*, gpointer); static void cb_preview_zoom_fit(GtkButton*, gpointer); static void cb_preview_zoom_in(GtkButton*, gpointer); static void cb_preview_zoom_out(GtkButton*, gpointer); static void cb_preview_request_page_setup(GtkPrintOperation*, GtkPrintContext*, gint,GtkPageSetup*,gpointer); static void printing_preview_update_zoom_sensitivity(PreviewData*); /* variables */ static GtkPrintSettings *settings = NULL; static GtkPageSetup *page_setup = NULL; /* other static functions */ static void printing_layout_set_text_attributes(PrintData*, GtkPrintContext *, gboolean *); static gboolean printing_is_pango_gdk_color_equal(PangoColor*, GdkColor*); static gint printing_text_iter_get_offset_bytes(PrintData *, const GtkTextIter*); #define PAGE_MARGIN_STORAGE_UNIT GTK_UNIT_MM #define PREVIEW_SCALE 72 #define PREVIEW_SHADOW_OFFSET 3 #define PREVIEW_ZOOM_FAC 1.41 #define PREVIEW_ZOOM_MAX 10. #define PREVIEW_ZOOM_MIN 0.2 static void free_pixbuf(gpointer key, gpointer value, gpointer data) { PangoAttrShape *attr = (PangoAttrShape *) value; g_object_unref(G_OBJECT(attr->data)); } gpointer printing_get_renderer_data(PrintData *print_data) { if (!print_data) return NULL; return print_data->renderer_data; } gdouble printing_get_zoom(PrintData *print_data) { if (!print_data) return 1.0; return print_data->zoom; } void printing_set_n_pages(PrintData *print_data, gint n_pages) { if (!print_data) return; print_data->npages = n_pages; } GtkPrintSettings *printing_get_settings(void) { if (settings == NULL) { settings = gtk_print_settings_new(); gtk_print_settings_set_use_color(settings, prefs_common.print_use_color); gtk_print_settings_set_collate(settings, prefs_common.print_use_collate); gtk_print_settings_set_reverse(settings, prefs_common.print_use_reverse); gtk_print_settings_set_duplex(settings, prefs_common.print_use_duplex); } return settings; } void printing_store_settings(GtkPrintSettings *new_settings) { if (settings != NULL) g_object_unref(settings); settings = g_object_ref(new_settings); prefs_common.print_use_color = gtk_print_settings_get_use_color(settings); prefs_common.print_use_collate = gtk_print_settings_get_collate(settings); prefs_common.print_use_reverse = gtk_print_settings_get_reverse(settings); prefs_common.print_use_duplex = gtk_print_settings_get_duplex(settings); } GtkPageSetup *printing_get_page_setup(void) { if (page_setup == NULL) { gboolean read_from_file; char *page_setup_filename; GKeyFile *keyfile; gboolean key_file_read; page_setup = gtk_page_setup_new(); read_from_file = FALSE; /* try reading the page setup from file */ page_setup_filename = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, PRINTING_PAGE_SETUP_STORAGE_FILE, NULL); keyfile = g_key_file_new(); key_file_read = g_key_file_load_from_file(keyfile, page_setup_filename, 0, NULL); g_free(page_setup_filename); if (key_file_read) read_from_file = gtk_page_setup_load_key_file(page_setup, keyfile, NULL, NULL); g_key_file_free(keyfile); if (read_from_file) { debug_print("Printing: Read page setup from key file\n"); } else { debug_print("Printing: Could not read page setup from key file\n"); } /* if reading from file did not work, or has not been tried (GTK+ < 2.14), use prefs */ if (!read_from_file) { /* paper size */ if (prefs_common.print_paper_type && *prefs_common.print_paper_type) { GtkPaperSize *paper = gtk_paper_size_new(prefs_common.print_paper_type); gtk_page_setup_set_paper_size(page_setup, paper); gtk_paper_size_free(paper); } /* orientation */ gtk_page_setup_set_orientation(page_setup, prefs_common.print_paper_orientation); /* margins */ if (prefs_common.print_margin_top != -1) gtk_page_setup_set_top_margin(page_setup, 0.01*prefs_common.print_margin_top, PAGE_MARGIN_STORAGE_UNIT); if (prefs_common.print_margin_bottom != -1) gtk_page_setup_set_bottom_margin(page_setup, 0.01*prefs_common.print_margin_bottom, PAGE_MARGIN_STORAGE_UNIT); if (prefs_common.print_margin_left != -1) gtk_page_setup_set_left_margin(page_setup, 0.01*prefs_common.print_margin_left, PAGE_MARGIN_STORAGE_UNIT); if (prefs_common.print_margin_right != -1) gtk_page_setup_set_right_margin(page_setup, 0.01*prefs_common.print_margin_right, PAGE_MARGIN_STORAGE_UNIT); } } return page_setup; } void printing_print_full(GtkWindow *parent, PrintRenderer *renderer, gpointer renderer_data, gint sel_start, gint sel_end, GtkImage *avatar) { GtkPrintOperation *op; GtkPrintOperationResult res; PrintData *print_data; op = gtk_print_operation_new(); print_data = g_new0(PrintData,1); print_data->renderer = renderer; print_data->renderer_data = renderer_data; print_data->sel_start = sel_start; print_data->sel_end = sel_end; print_data->avatar = (avatar != NULL? GTK_IMAGE(g_object_ref(avatar)): NULL); print_data->zoom = 1.; print_data->images = g_hash_table_new(g_direct_hash, g_direct_equal); print_data->pango_context = renderer->get_pango_context(renderer_data); print_data->to_print = renderer->get_data_to_print(renderer_data, sel_start, sel_end); printing_get_settings(); printing_get_page_setup(); /* Config for printing */ gtk_print_operation_set_print_settings(op, settings); gtk_print_operation_set_default_page_setup(op, page_setup); /* enable Page Size and Orientation in the print dialog */ gtk_print_operation_set_embed_page_setup(op, TRUE); /* signals */ g_signal_connect(op, "begin_print", G_CALLBACK(renderer->cb_begin_print), print_data); g_signal_connect(op, "draw_page", G_CALLBACK(renderer->cb_draw_page), print_data); g_signal_connect(op, "preview", G_CALLBACK(cb_preview), print_data); /* Start printing process */ res = gtk_print_operation_run(op, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG, parent, NULL); if (res == GTK_PRINT_OPERATION_RESULT_ERROR) { GError *error = NULL; gtk_print_operation_get_error(op, &error); debug_print("Error printing message: %s\n", error ? error->message : "no details"); } else if (res == GTK_PRINT_OPERATION_RESULT_APPLY) { /* store settings for next printing session */ printing_store_settings(gtk_print_operation_get_print_settings(op)); } g_hash_table_foreach(print_data->images, free_pixbuf, NULL); g_hash_table_destroy(print_data->images); if (print_data->to_print) g_free(print_data->to_print); g_list_free(print_data->page_breaks); if (print_data->layout) g_object_unref(print_data->layout); if (print_data->avatar) g_object_unref(print_data->avatar); g_free(print_data); g_object_unref(op); debug_print("printing_print finished\n"); } static PangoContext *printing_textview_get_pango_context(gpointer data) { return gtk_widget_get_pango_context(GTK_WIDGET(data)); } static gpointer printing_textview_get_data_to_print(gpointer data, gint sel_start, gint sel_end) { GtkTextView *text_view = GTK_TEXT_VIEW(data); GtkTextBuffer *buffer = gtk_text_view_get_buffer(text_view); GtkTextIter start, end; if (sel_start < 0 || sel_end <= sel_start) { gtk_text_buffer_get_start_iter(buffer, &start); gtk_text_buffer_get_end_iter(buffer, &end); } else { gtk_text_buffer_get_iter_at_offset(buffer, &start, sel_start); gtk_text_buffer_get_iter_at_offset(buffer, &end, sel_end); } return gtk_text_buffer_get_text(buffer, &start, &end, FALSE); } void printing_print(GtkTextView *text_view, GtkWindow *parent, gint sel_start, gint sel_end, GtkImage *avatar) { PrintRenderer *textview_renderer = g_new0(PrintRenderer, 1); textview_renderer->get_pango_context = printing_textview_get_pango_context; textview_renderer->get_data_to_print = printing_textview_get_data_to_print; textview_renderer->cb_begin_print = printing_textview_cb_begin_print; textview_renderer->cb_draw_page = printing_textview_cb_draw_page; printing_print_full(parent, textview_renderer, text_view, sel_start, sel_end, avatar); g_free(textview_renderer); } void printing_page_setup(GtkWindow *parent) { GtkPageSetup *new_page_setup; char *keyfile; keyfile = NULL; printing_get_settings(); printing_get_page_setup(); new_page_setup = gtk_print_run_page_setup_dialog(parent,page_setup,settings); if (page_setup) g_object_unref(page_setup); page_setup = new_page_setup; g_free(prefs_common.print_paper_type); prefs_common.print_paper_type = g_strdup(gtk_paper_size_get_name( gtk_page_setup_get_paper_size(page_setup))); prefs_common.print_paper_orientation = gtk_page_setup_get_orientation(page_setup); /* store 100th millimeters */ prefs_common.print_margin_top = (int) (100*gtk_page_setup_get_top_margin(page_setup, PAGE_MARGIN_STORAGE_UNIT)); prefs_common.print_margin_bottom = (int) (100*gtk_page_setup_get_bottom_margin(page_setup, PAGE_MARGIN_STORAGE_UNIT)); prefs_common.print_margin_left = (int) (100*gtk_page_setup_get_left_margin(page_setup, PAGE_MARGIN_STORAGE_UNIT)); prefs_common.print_margin_right = (int) (100*gtk_page_setup_get_right_margin(page_setup, PAGE_MARGIN_STORAGE_UNIT)); /* save to file */ keyfile = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, PRINTING_PAGE_SETUP_STORAGE_FILE, NULL); if (!gtk_page_setup_to_file(page_setup, keyfile, NULL)) { debug_print("Printing: Could not store page setup in file `%s'\n", keyfile); } g_free(keyfile); } static gboolean cb_preview(GtkPrintOperation *operation, GtkPrintOperationPreview *preview, GtkPrintContext *context, GtkWindow *parent, gpointer data) { PrintData *print_data; cairo_t *cr; PreviewData *preview_data; GtkWidget *vbox; GtkWidget *toolbar; GtkWidget *da; GtkWidget *sw; GtkWidget *page; GtkToolItem *separator; static GdkGeometry geometry; GtkWidget *dialog = NULL; GtkWidget *statusbar = gtk_hbox_new(2, FALSE); debug_print("Creating internal print preview\n"); print_data = (PrintData*) data; preview_data = g_new0(PreviewData,1); preview_data->print_data = print_data; preview_data->op = g_object_ref(operation); preview_data->preview = preview; /* Window */ dialog = gtkut_window_new(GTK_WINDOW_TOPLEVEL, "print_preview"); preview_data->dialog = dialog; if (!geometry.min_height) { geometry.min_width = 600; geometry.min_height = 400; } gtk_window_set_type_hint(GTK_WINDOW(dialog), GDK_WINDOW_TYPE_HINT_DIALOG); gtk_window_set_geometry_hints(GTK_WINDOW(dialog), NULL, &geometry, GDK_HINT_MIN_SIZE); gtk_widget_set_size_request(dialog, prefs_common.print_previewwin_width, prefs_common.print_previewwin_height); gtk_window_set_title(GTK_WINDOW(dialog), _("Print preview")); /* vbox */ vbox = gtk_vbox_new(FALSE, 0); gtk_container_add(GTK_CONTAINER(dialog), vbox); /* toolbar */ toolbar = gtk_toolbar_new(); gtk_orientable_set_orientation(GTK_ORIENTABLE(toolbar), GTK_ORIENTATION_HORIZONTAL); switch (prefs_common.toolbar_style) { case TOOLBAR_ICON: gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_ICONS); break; case TOOLBAR_TEXT: gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_TEXT); break; case TOOLBAR_BOTH_HORIZ: gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_BOTH_HORIZ); break; case TOOLBAR_BOTH: default: gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_BOTH); } gtk_toolbar_set_show_arrow(GTK_TOOLBAR(toolbar), TRUE); gtk_box_pack_start(GTK_BOX(vbox), toolbar, FALSE, FALSE, 0); #define CLAWS_SET_TOOL_ITEM_TIP(widget,tip) { \ gtk_tool_item_set_tooltip_text(GTK_TOOL_ITEM(widget), tip); \ } #define TOOLBAR_ITEM(item,text,tooltip,cb,cbdata) { \ item = GTK_WIDGET(gtk_tool_button_new_from_stock(text)); \ gtk_tool_item_set_homogeneous(GTK_TOOL_ITEM(item), FALSE); \ gtk_tool_item_set_is_important(GTK_TOOL_ITEM(item), TRUE); \ gtk_toolbar_insert(GTK_TOOLBAR(toolbar), GTK_TOOL_ITEM(item), -1); \ g_signal_connect (G_OBJECT(item), "clicked", G_CALLBACK(cb), cbdata); \ CLAWS_SET_TOOL_ITEM_TIP(GTK_TOOL_ITEM(item), \ tooltip); \ } TOOLBAR_ITEM(preview_data->first, GTK_STOCK_GOTO_FIRST, _("First page"), cb_preview_go_first, preview_data); TOOLBAR_ITEM(preview_data->previous, GTK_STOCK_GO_BACK, _("Previous page"), cb_preview_go_previous, preview_data); page = gtk_label_new(""); preview_data->page_nr_label = page; TOOLBAR_ITEM(preview_data->next, GTK_STOCK_GO_FORWARD, _("Next page"), cb_preview_go_next, preview_data); TOOLBAR_ITEM(preview_data->last, GTK_STOCK_GOTO_LAST, _("Last page"), cb_preview_go_last, preview_data); separator = gtk_separator_tool_item_new(); gtk_toolbar_insert(GTK_TOOLBAR(toolbar), GTK_TOOL_ITEM(separator), -1); TOOLBAR_ITEM(preview_data->zoom_100, GTK_STOCK_ZOOM_100, _("Zoom 100%"), cb_preview_zoom_100, preview_data); TOOLBAR_ITEM(preview_data->zoom_fit, GTK_STOCK_ZOOM_FIT, _("Zoom fit"), cb_preview_zoom_fit, preview_data); TOOLBAR_ITEM(preview_data->zoom_in, GTK_STOCK_ZOOM_IN, _("Zoom in"), cb_preview_zoom_in, preview_data); TOOLBAR_ITEM(preview_data->zoom_out, GTK_STOCK_ZOOM_OUT, _("Zoom out"), cb_preview_zoom_out, preview_data); separator = gtk_separator_tool_item_new(); gtk_toolbar_insert(GTK_TOOLBAR(toolbar), GTK_TOOL_ITEM(separator), -1); /* tooltip has to be NULL else it triggers an expose_event */ TOOLBAR_ITEM(preview_data->close, GTK_STOCK_CLOSE, NULL, cb_preview_btn_close, preview_data); gtk_widget_show(statusbar); gtk_box_pack_start(GTK_BOX(vbox), statusbar, FALSE, FALSE, 0); gtk_box_pack_start(GTK_BOX(statusbar), page, FALSE, FALSE, 0); /* Drawing area */ sw = gtk_scrolled_window_new(NULL, NULL); gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sw), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC); gtk_box_pack_start(GTK_BOX(vbox), sw, TRUE, TRUE, 0); da = gtk_drawing_area_new(); gtk_widget_set_double_buffered(da, FALSE); gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(sw), da); gtk_widget_realize(da); preview_data->scrolled_window = sw; preview_data->area = da; /* cairo context */ cr = gdk_cairo_create(gtk_widget_get_window(da)); gtk_print_context_set_cairo_context(context, cr, PREVIEW_SCALE, PREVIEW_SCALE); cairo_destroy(cr); /* signals */ g_signal_connect(dialog, "key_press_event", G_CALLBACK(cb_preview_close), preview_data); g_signal_connect(dialog, "size_allocate", G_CALLBACK(cb_preview_size_allocate), NULL); g_signal_connect(dialog, "destroy",G_CALLBACK(cb_preview_destroy), preview_data); g_signal_connect(preview, "ready", G_CALLBACK(cb_preview_ready), preview_data); g_signal_connect(preview, "got-page-size", G_CALLBACK(cb_preview_got_page_size), preview_data); g_signal_connect(operation, "request-page-setup", G_CALLBACK(cb_preview_request_page_setup), preview_data); gtk_widget_show_all(dialog); return TRUE; } static void cb_preview_destroy(GtkWindow *window, gpointer data) { PreviewData *preview_data; preview_data = (PreviewData*) data; if (preview_data->rendering) return; debug_print("Preview window destroyed\n"); gtk_print_operation_preview_end_preview(preview_data->preview); g_object_unref(preview_data->op); g_list_free(preview_data->pages_to_print); g_free(preview_data); } static gboolean cb_preview_close(GtkWidget *widget, GdkEventAny *event, gpointer data) { PreviewData *preview_data = (PreviewData *)data; if (event->type == GDK_KEY_PRESS) if (((GdkEventKey *)event)->keyval != GDK_KEY_Escape) return FALSE; if (preview_data->rendering) return FALSE; gtk_widget_destroy(widget); return FALSE; } static void cb_preview_size_allocate(GtkWidget *widget, GtkAllocation *allocation) { cm_return_if_fail(allocation != NULL); prefs_common.print_previewwin_width = allocation->width; prefs_common.print_previewwin_height = allocation->height; } static void cb_preview_ready(GtkPrintOperationPreview *preview, GtkPrintContext *context, gpointer data) { PreviewData *preview_data; gint iPage; preview_data = (PreviewData*) data; debug_print("preview_ready %d\n", preview_data->print_data->npages); for (iPage = 0; iPage < (preview_data->print_data->npages); iPage++) { if (gtk_print_operation_preview_is_selected(preview_data->preview, iPage)) { preview_data->pages_to_print = g_list_prepend(preview_data->pages_to_print, GINT_TO_POINTER(iPage)); debug_print("want to print page %d\n",iPage+1); } } preview_data->pages_to_print = g_list_reverse(preview_data->pages_to_print); preview_data->current_page = preview_data->pages_to_print; preview_data->context = context; g_signal_connect(preview_data->area, "expose_event", G_CALLBACK(cb_preview_expose), preview_data); gtk_widget_queue_draw(preview_data->area); } static void cb_preview_got_page_size(GtkPrintOperationPreview *preview, GtkPrintContext *context, GtkPageSetup *page_setup, gpointer data) { PreviewData *preview_data; GtkPaperSize *paper_size; gint paper_width; gint paper_height; preview_data = (PreviewData*) data; debug_print("got_page_size\n"); paper_size = gtk_page_setup_get_paper_size(page_setup); paper_width = (gint)(gtk_paper_size_get_width(paper_size, GTK_UNIT_INCH) * PREVIEW_SCALE); paper_height = (gint)(gtk_paper_size_get_height(paper_size, GTK_UNIT_INCH) * PREVIEW_SCALE); preview_data->page_width = paper_width; preview_data->page_height = paper_height; debug_print("w/h %d/%d\n", paper_width, paper_height); gtk_widget_set_size_request(GTK_WIDGET(preview_data->area), paper_width, paper_height); } static gboolean cb_preview_expose(GtkWidget *widget, GdkEventExpose *event, gpointer data) { PreviewData *preview_data = data; cairo_t *cr; debug_print("preview_expose (current %p)\n", preview_data->current_page); cr = gdk_cairo_create(gtk_widget_get_window(preview_data->area)); /* background */ cairo_set_source_rgb(cr, 0.5, 0.5, 0.5); cairo_rectangle(cr, event->area.x, event->area.y, event->area.width, event->area.height); cairo_fill(cr); /* shadow */ cairo_set_source_rgb(cr, 0., 0., 0.); cairo_rectangle(cr, PREVIEW_SHADOW_OFFSET, PREVIEW_SHADOW_OFFSET, preview_data->page_width+PREVIEW_SHADOW_OFFSET, preview_data->page_height+PREVIEW_SHADOW_OFFSET); cairo_fill(cr); /* paper */ cairo_set_source_rgb(cr, 1., 1., 1.); cairo_rectangle(cr, 0, 0, preview_data->page_width, preview_data->page_height); cairo_fill(cr); gtk_print_context_set_cairo_context(preview_data->context, cr, PREVIEW_SCALE, PREVIEW_SCALE); cairo_destroy(cr); if (preview_data->current_page) { preview_data->rendering = TRUE; gtk_widget_set_sensitive(preview_data->close, FALSE); int cur = GPOINTER_TO_INT(preview_data->current_page->data); gchar *str; str = g_strdup_printf(_("Page %d"), cur+1); gtk_label_set_text(GTK_LABEL(preview_data->page_nr_label), str); g_free(str); gtk_print_operation_preview_render_page(preview_data->preview, GPOINTER_TO_INT (preview_data->current_page->data)); gtk_widget_set_sensitive(preview_data->first, preview_data->current_page->prev != NULL); gtk_widget_set_sensitive(preview_data->previous, preview_data->current_page->prev != NULL); gtk_widget_set_sensitive(preview_data->next, preview_data->current_page->next != NULL); gtk_widget_set_sensitive(preview_data->last, preview_data->current_page->next != NULL); gtk_widget_set_sensitive(preview_data->close, TRUE); preview_data->rendering = FALSE; } return TRUE; } static void cb_preview_go_first(GtkButton *button, gpointer data) { PreviewData *preview_data = (PreviewData*) data; preview_data->current_page = preview_data->pages_to_print; gtk_widget_queue_draw(preview_data->area); } static void cb_preview_go_previous(GtkButton *button, gpointer data) { GList *next; PreviewData *preview_data = (PreviewData*) data; next = g_list_previous(preview_data->current_page); if (next) preview_data->current_page = next; gtk_widget_queue_draw(preview_data->area); } static void cb_preview_go_next(GtkButton *button, gpointer data) { GList *next; PreviewData *preview_data = (PreviewData*) data; next = g_list_next(preview_data->current_page); if (next) preview_data->current_page = next; gtk_widget_queue_draw(preview_data->area); } static void cb_preview_go_last(GtkButton *button, gpointer data) { PreviewData *preview_data = (PreviewData*) data; preview_data->current_page = g_list_last(preview_data->current_page); gtk_widget_queue_draw(preview_data->area); } static void cb_preview_btn_close(GtkButton *button, gpointer data) { PreviewData *preview_data = (PreviewData *)data; if (preview_data->rendering) return; gtk_widget_destroy(preview_data->dialog); } static void cb_preview_zoom_100(GtkButton *button, gpointer data) { PreviewData *preview_data = (PreviewData*) data; if (preview_data->print_data->zoom != 1.) { preview_data->print_data->zoom = 1.; gtk_widget_queue_draw(preview_data->area); printing_preview_update_zoom_sensitivity(preview_data); } } static void cb_preview_zoom_fit(GtkButton *button, gpointer data) { PreviewData *preview_data = (PreviewData*) data; GtkAllocation allocation; gdouble zoom_w; gdouble zoom_h; gtk_widget_get_allocation(preview_data->scrolled_window, &allocation); zoom_w = ((gdouble)allocation.width) / ((gdouble)preview_data->page_width/preview_data->print_data->zoom + PREVIEW_SHADOW_OFFSET); zoom_h = ((gdouble)allocation.height) / ((gdouble)preview_data->page_height/preview_data->print_data->zoom + PREVIEW_SHADOW_OFFSET); preview_data->print_data->zoom = MIN(zoom_w,zoom_h) - 0.01; if (preview_data->print_data->zoom > PREVIEW_ZOOM_MAX) preview_data->print_data->zoom = PREVIEW_ZOOM_MAX; else if (preview_data->print_data->zoom < PREVIEW_ZOOM_MIN) preview_data->print_data->zoom = PREVIEW_ZOOM_MIN; printing_preview_update_zoom_sensitivity(preview_data); gtk_widget_queue_draw(preview_data->area); } static void cb_preview_zoom_in(GtkButton *button, gpointer data) { PreviewData *preview_data = (PreviewData*) data; gdouble new_zoom; new_zoom = preview_data->print_data->zoom * PREVIEW_ZOOM_FAC; if (new_zoom <= PREVIEW_ZOOM_MAX) { preview_data->print_data->zoom = new_zoom; printing_preview_update_zoom_sensitivity(preview_data); gtk_widget_queue_draw(preview_data->area); } } static void cb_preview_zoom_out(GtkButton *button, gpointer data) { PreviewData *preview_data = (PreviewData*) data; gdouble new_zoom; new_zoom = preview_data->print_data->zoom / PREVIEW_ZOOM_FAC; if (new_zoom >= PREVIEW_ZOOM_MIN) { preview_data->print_data->zoom = new_zoom; printing_preview_update_zoom_sensitivity(preview_data); gtk_widget_queue_draw(preview_data->area); } } static void cb_preview_request_page_setup(GtkPrintOperation *op, GtkPrintContext *context, gint page_nr, GtkPageSetup *setup,gpointer data) { GtkPaperSize *paper_size; GtkPaperSize *old_size; gdouble width; gdouble height; gdouble top_margin; gdouble bottom_margin; gdouble left_margin; gdouble right_margin; PreviewData *preview_data = (PreviewData*) data; old_size = gtk_page_setup_get_paper_size(setup); width = gtk_paper_size_get_width(old_size,GTK_UNIT_INCH); height = gtk_paper_size_get_height(old_size,GTK_UNIT_INCH); top_margin = gtk_page_setup_get_top_margin(setup,GTK_UNIT_INCH); bottom_margin = gtk_page_setup_get_bottom_margin(setup,GTK_UNIT_INCH); left_margin = gtk_page_setup_get_left_margin(setup,GTK_UNIT_INCH); right_margin = gtk_page_setup_get_right_margin(setup,GTK_UNIT_INCH); paper_size = gtk_paper_size_new_custom("preview paper", "preview_paper", width*preview_data->print_data->zoom, height*preview_data->print_data->zoom, GTK_UNIT_INCH); gtk_page_setup_set_paper_size(setup, paper_size); gtk_paper_size_free(paper_size); gtk_page_setup_set_top_margin(setup,top_margin*preview_data->print_data->zoom, GTK_UNIT_INCH); gtk_page_setup_set_bottom_margin(setup,bottom_margin*preview_data->print_data->zoom, GTK_UNIT_INCH); gtk_page_setup_set_left_margin(setup,left_margin*preview_data->print_data->zoom, GTK_UNIT_INCH); gtk_page_setup_set_right_margin(setup,right_margin*preview_data->print_data->zoom, GTK_UNIT_INCH); } static void printing_textview_cb_begin_print(GtkPrintOperation *op, GtkPrintContext *context, gpointer user_data) { double width, height; int num_lines; double page_height; GList *page_breaks; PrintData *print_data; PangoFontDescription *desc; int start, ii; PangoLayoutIter *iter; gint header_end_pos; gint num_header_lines; gint dummy; gboolean header_done; gboolean has_headers = FALSE; const gchar *text; double line_height =0.; print_data = (PrintData*) user_data; debug_print("Preparing print job...\n"); width = gtk_print_context_get_width(context); height = gtk_print_context_get_height(context); if (print_data->layout == NULL) print_data->layout = gtk_print_context_create_pango_layout(context); if (prefs_common.use_different_print_font) desc = pango_font_description_from_string(prefs_common.printfont); else desc = pango_font_description_copy( pango_context_get_font_description(print_data->pango_context)); pango_layout_set_font_description(print_data->layout, desc); pango_font_description_free(desc); pango_layout_set_width(print_data->layout, width * PANGO_SCALE); pango_layout_set_text(print_data->layout, (char *)print_data->to_print, -1); printing_layout_set_text_attributes(print_data, context, &has_headers); num_lines = pango_layout_get_line_count(print_data->layout); page_breaks = NULL; page_height = 0; start = 0; ii = 0; iter = pango_layout_get_iter(print_data->layout); /* find the last character of the header */ header_end_pos = 0; header_done = FALSE; text = pango_layout_get_text(print_data->layout); if (has_headers) { if (text && *text && *text != '\n') { do { if (text[0] == '\n' && (text[1] != '\0') && (text[1] == '\n')) header_done = TRUE; else header_end_pos++; text++; } while(*text && !header_done); } /* find line number for header end */ pango_layout_index_to_line_x(print_data->layout, header_end_pos, 1, &num_header_lines, &dummy); /* line count is zero-based */ num_header_lines++; } else { print_data->ypos_line = -1.0; } do { PangoRectangle logical_rect; PangoAttrShape *attr = NULL; if (ii >= start) { pango_layout_iter_get_line_extents(iter, NULL, &logical_rect); if ((attr = g_hash_table_lookup(print_data->images, GINT_TO_POINTER(pango_layout_iter_get_index(iter)))) != NULL) { line_height = (double)gdk_pixbuf_get_height(GDK_PIXBUF(attr->data)); } else { line_height = ((double)logical_rect.height) / PANGO_SCALE; } } if ((page_height + line_height) > height) { page_breaks = g_list_prepend(page_breaks, GINT_TO_POINTER(ii)); page_height = 0; } if (has_headers && ii == num_header_lines) { int y0, y1; pango_layout_iter_get_line_yrange(iter,&y0,&y1); print_data->ypos_line = (double)y0 + 1./3.*((double)(y1 - y0))/2.; } page_height += line_height; ii++; } while(ii < num_lines && pango_layout_iter_next_line(iter)); pango_layout_iter_free(iter); page_breaks = g_list_reverse(page_breaks); print_data->npages = g_list_length(page_breaks) + 1; print_data->page_breaks = page_breaks; gtk_print_operation_set_n_pages(op, print_data->npages); debug_print("Starting print job...\n"); } static cairo_surface_t *pixbuf_to_surface(GdkPixbuf *pixbuf) { cairo_surface_t *surface; cairo_format_t format; static const cairo_user_data_key_t key; guchar *pixels = g_malloc( 4* gdk_pixbuf_get_width(pixbuf)* gdk_pixbuf_get_height(pixbuf)); guchar *src_pixels = gdk_pixbuf_get_pixels (pixbuf); gint width = gdk_pixbuf_get_width(pixbuf); gint height = gdk_pixbuf_get_height(pixbuf); gint nchans = gdk_pixbuf_get_n_channels (pixbuf); gint stride = gdk_pixbuf_get_rowstride (pixbuf); gint j; if (nchans == 3) format = CAIRO_FORMAT_RGB24; else format = CAIRO_FORMAT_ARGB32; surface = cairo_image_surface_create_for_data (pixels, format, width, height, 4*width); cairo_surface_set_user_data (surface, &key, pixels, (cairo_destroy_func_t)g_free); for (j = height; j; j--) { guchar *p = src_pixels; guchar *q = pixels; if (nchans == 3) { guchar *end = p + 3 * width; while (p < end) { #if G_BYTE_ORDER == G_LITTLE_ENDIAN q[0] = p[2]; q[1] = p[1]; q[2] = p[0]; #else q[1] = p[0]; q[2] = p[1]; q[3] = p[2]; #endif p += 3; q += 4; } } else { guchar *end = p + 4 * width; guint t1,t2,t3; #define MULT(d,c,a,t) G_STMT_START { t = c * a + 0x7f; d = ((t >> 8) + t) >> 8; } G_STMT_END while (p < end) { #if G_BYTE_ORDER == G_LITTLE_ENDIAN MULT(q[0], p[2], p[3], t1); MULT(q[1], p[1], p[3], t2); MULT(q[2], p[0], p[3], t3); q[3] = p[3]; #else q[0] = p[3]; MULT(q[1], p[0], p[3], t1); MULT(q[2], p[1], p[3], t2); MULT(q[3], p[2], p[3], t3); #endif p += 4; q += 4; } #undef MULT } src_pixels += stride; pixels += 4 * width; } return surface; } static void printing_textview_cb_draw_page(GtkPrintOperation *op, GtkPrintContext *context, int page_nr, gpointer user_data) { cairo_t *cr; PrintData *print_data; int start, end, ii; GList *pagebreak; PangoLayoutIter *iter; double start_pos; gboolean notlast = TRUE; print_data = (PrintData*) user_data; if (page_nr == 0) { start = 0; } else { pagebreak = g_list_nth(print_data->page_breaks, page_nr - 1); start = GPOINTER_TO_INT(pagebreak->data); } pagebreak = g_list_nth(print_data->page_breaks, page_nr); if (pagebreak == NULL) end = pango_layout_get_line_count(print_data->layout); else end = GPOINTER_TO_INT(pagebreak->data); cr = gtk_print_context_get_cairo_context(context); cairo_scale(cr, print_data->zoom, print_data->zoom); cairo_set_source_rgb(cr, 0., 0., 0.); ii = 0; start_pos = 0.; iter = pango_layout_get_iter(print_data->layout); do { PangoRectangle logical_rect; PangoLayoutLine *line; PangoAttrShape *attr = NULL; int baseline; if (ii >= start) { line = pango_layout_iter_get_line(iter); pango_layout_iter_get_line_extents(iter, NULL, &logical_rect); baseline = pango_layout_iter_get_baseline(iter); if (ii == start) { start_pos = ((double)logical_rect.y) / PANGO_SCALE; } /* Draw header separator line */ if (ii == 0 && print_data->ypos_line >= 0) { cairo_surface_t *surface; surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, gtk_print_context_get_width(context)/print_data->zoom, gtk_print_context_get_height(context)/print_data->zoom); cairo_set_line_width(cr, .5); cairo_set_source_surface(cr, surface, ((double)logical_rect.x) / PANGO_SCALE, ((double)baseline) / PANGO_SCALE - start_pos); cairo_move_to(cr, ((double)logical_rect.x) / PANGO_SCALE, (double)print_data->ypos_line / PANGO_SCALE); cairo_rel_line_to(cr, gtk_print_context_get_width(context)/print_data->zoom, 0); cairo_set_source_rgb(cr, 0., 0., 0.); cairo_stroke(cr); cairo_surface_destroy(surface); } cairo_move_to(cr, ((double)logical_rect.x) / PANGO_SCALE, ((double)baseline) / PANGO_SCALE - start_pos); if ((attr = g_hash_table_lookup(print_data->images, GINT_TO_POINTER(pango_layout_iter_get_index(iter)))) != NULL) { cairo_surface_t *surface; surface = pixbuf_to_surface(GDK_PIXBUF(attr->data)); cairo_set_source_surface (cr, surface, ((double)logical_rect.x) / PANGO_SCALE, ((double)baseline) / PANGO_SCALE - start_pos); cairo_paint (cr); cairo_surface_destroy (surface); } else { pango_cairo_show_layout_line(cr, line); } } ii++; } while(ii < end && (notlast = pango_layout_iter_next_line(iter))); if (print_data->avatar && page_nr == 0) { cairo_surface_t *surface; GdkPixbuf *pixbuf = gtk_image_get_pixbuf(print_data->avatar); gdouble startx, starty; if (pixbuf != NULL) { startx = gtk_print_context_get_width(context)/print_data->zoom; startx -= ((double)gdk_pixbuf_get_width(pixbuf)); starty = start_pos; surface = pixbuf_to_surface(pixbuf); cairo_set_source_surface (cr, surface, startx, starty); cairo_paint (cr); cairo_surface_destroy (surface); } } pango_layout_iter_free(iter); debug_print("Sent page %d to printer\n", page_nr+1); } static void printing_layout_set_text_attributes(PrintData *print_data, GtkPrintContext *context, gboolean *has_headers) { GtkTextIter iter; PangoAttrList *attr_list; PangoAttribute *attr; GSList *open_attrs, *attr_walk; GtkTextView *text_view = GTK_TEXT_VIEW(print_data->renderer_data); GtkTextBuffer *buffer = gtk_text_view_get_buffer(text_view); *has_headers = FALSE; attr_list = pango_attr_list_new(); if (print_data->sel_start < 0 || print_data->sel_end <= print_data->sel_start) { gtk_text_buffer_get_start_iter(buffer, &iter); } else { gtk_text_buffer_get_iter_at_offset(buffer, &iter, print_data->sel_start); } open_attrs = NULL; do { gboolean fg_set, bg_set, under_set, strike_set, weight_set; GSList *tags, *tag_walk; GtkTextTag *tag; GdkColor *color = NULL; PangoUnderline underline; gboolean strikethrough; gint weight; GdkPixbuf *image; if (prefs_common.print_imgs && (image = gtk_text_iter_get_pixbuf(&iter)) != NULL) { PangoRectangle rect = {0, 0, 0, 0}; gint startpos = printing_text_iter_get_offset_bytes(print_data, &iter); gint h = gdk_pixbuf_get_height(image); gint w = gdk_pixbuf_get_width(image); gint a_h = gtk_print_context_get_height(context); gint a_w = gtk_print_context_get_width(context); gint r_h, r_w; GdkPixbuf *scaled = NULL; image_viewer_get_resized_size(w, h, a_w, a_h, &r_w, &r_h); rect.x = 0; rect.y = 0; rect.width = r_w * PANGO_SCALE; rect.height = r_h * PANGO_SCALE; scaled = gdk_pixbuf_scale_simple(image, r_w, r_h, GDK_INTERP_BILINEAR); attr = pango_attr_shape_new_with_data (&rect, &rect, scaled, NULL, NULL); attr->start_index = startpos; attr->end_index = startpos+1; pango_attr_list_insert(attr_list, attr); g_hash_table_insert(print_data->images, GINT_TO_POINTER(startpos), attr); print_data->img_cnt++; } if (gtk_text_iter_ends_tag(&iter, NULL)) { PangoAttrColor *attr_color; PangoAttrInt *attr_int; tags = gtk_text_iter_get_toggled_tags(&iter, FALSE); for (tag_walk = tags; tag_walk != NULL; tag_walk = tag_walk->next) { gboolean found; tag = GTK_TEXT_TAG(tag_walk->data); g_object_get(G_OBJECT(tag), "background-set", &bg_set, "foreground-set", &fg_set, "underline-set",&under_set, "strikethrough-set", &strike_set, "weight-set", &weight_set, NULL); if (fg_set) { found = FALSE; for (attr_walk = open_attrs; attr_walk != NULL; attr_walk = attr_walk->next) { attr = (PangoAttribute*)attr_walk->data; if (attr->klass->type == PANGO_ATTR_FOREGROUND) { attr_color = (PangoAttrColor*) attr; g_object_get(G_OBJECT(tag), "foreground_gdk", &color, NULL); if (color && printing_is_pango_gdk_color_equal(&(attr_color->color), color)) { attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter); pango_attr_list_insert(attr_list, attr); found = TRUE; open_attrs = g_slist_delete_link(open_attrs, attr_walk); break; } if (color) gdk_color_free(color); } } if (!found) debug_print("Error generating attribute list.\n"); } if (bg_set) { found = FALSE; for (attr_walk = open_attrs; attr_walk != NULL; attr_walk = attr_walk->next) { attr = (PangoAttribute*)attr_walk->data; if (attr->klass->type == PANGO_ATTR_BACKGROUND) { attr_color = (PangoAttrColor*) attr; g_object_get(G_OBJECT(tag), "background-gdk", &color, NULL); if (color && printing_is_pango_gdk_color_equal(&(attr_color->color), color)) { attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter); pango_attr_list_insert(attr_list, attr); found = TRUE; open_attrs = g_slist_delete_link(open_attrs, attr_walk); break; } if (color) gdk_color_free(color); } } if (!found) debug_print("Error generating attribute list.\n"); } if (under_set) { found = FALSE; for (attr_walk = open_attrs; attr_walk != NULL; attr_walk = attr_walk->next) { attr = (PangoAttribute*)attr_walk->data; if (attr->klass->type == PANGO_ATTR_UNDERLINE) { attr_int = (PangoAttrInt*)attr; g_object_get(G_OBJECT(tag), "underline", &underline, NULL); if (attr_int->value == underline) { attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter); pango_attr_list_insert(attr_list, attr); found = TRUE; open_attrs = g_slist_delete_link(open_attrs, attr_walk); break; } } } if (!found) debug_print("Error generating attribute list.\n"); } if (strike_set) { found = FALSE; for (attr_walk = open_attrs; attr_walk != NULL; attr_walk = attr_walk->next) { attr = (PangoAttribute*)attr_walk->data; if (attr->klass->type == PANGO_ATTR_STRIKETHROUGH) { attr_int = (PangoAttrInt*)attr; g_object_get(G_OBJECT(tag), "strikethrough", &strikethrough, NULL); if (attr_int->value == strikethrough) { attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter); pango_attr_list_insert(attr_list, attr); found = TRUE; open_attrs = g_slist_delete_link(open_attrs, attr_walk); break; } } } if (!found) debug_print("Error generating attribute list.\n"); } if (weight_set) { found = FALSE; for (attr_walk = open_attrs; attr_walk != NULL; attr_walk = attr_walk->next) { attr = (PangoAttribute*)attr_walk->data; if (attr->klass->type == PANGO_ATTR_WEIGHT) { attr_int = (PangoAttrInt*)attr; g_object_get(G_OBJECT(tag), "weight", &weight, NULL); if (attr_int->value == weight) { attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter); pango_attr_list_insert(attr_list, attr); found = TRUE; open_attrs = g_slist_delete_link(open_attrs, attr_walk); break; } } } if (!found) debug_print("Error generating attribute list.\n"); } } g_slist_free(tags); } if (gtk_text_iter_begins_tag(&iter, NULL)) { tags = gtk_text_iter_get_toggled_tags(&iter, TRUE); /* Sometimes, an iter has several weights. Use only the first in this case */ gboolean weight_set_for_this_iter; weight_set_for_this_iter = FALSE; for (tag_walk = tags; tag_walk != NULL; tag_walk = tag_walk->next) { tag = GTK_TEXT_TAG(tag_walk->data); g_object_get(G_OBJECT(tag), "background-set", &bg_set, "foreground-set", &fg_set, "underline-set", &under_set, "strikethrough-set", &strike_set, "weight-set", &weight_set, NULL); if (fg_set) { g_object_get(G_OBJECT(tag), "foreground-gdk", &color, NULL); attr = pango_attr_foreground_new(color->red,color->green,color->blue); attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter); open_attrs = g_slist_prepend(open_attrs, attr); } if (bg_set) { g_object_get(G_OBJECT(tag), "background-gdk", &color, NULL); attr = pango_attr_background_new(color->red,color->green,color->blue); attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter); open_attrs = g_slist_prepend(open_attrs, attr); } if (under_set) { g_object_get(G_OBJECT(tag), "underline", &underline, NULL); attr = pango_attr_underline_new(underline); attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter); open_attrs = g_slist_prepend(open_attrs, attr); } if (strike_set) { g_object_get(G_OBJECT(tag), "strikethrough", &strikethrough, NULL); attr = pango_attr_strikethrough_new(strikethrough); attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter); open_attrs = g_slist_prepend(open_attrs, attr); } if (weight_set && !weight_set_for_this_iter) { weight_set_for_this_iter = TRUE; g_object_get(G_OBJECT(tag), "weight", &weight, NULL); attr = pango_attr_weight_new(weight); attr->start_index = printing_text_iter_get_offset_bytes(print_data, &iter); open_attrs = g_slist_prepend(open_attrs, attr); /* Hack to see if the first char is bold -- indicates header */ if (attr->start_index == 0 && weight == PANGO_WEIGHT_BOLD) { *has_headers = TRUE; } } } g_slist_free(tags); } } while(!gtk_text_iter_is_end(&iter) && gtk_text_iter_forward_to_tag_toggle(&iter, NULL)); /* close all open attributes */ for (attr_walk = open_attrs; attr_walk != NULL; attr_walk = attr_walk->next) { attr = (PangoAttribute*) attr_walk->data; attr->end_index = printing_text_iter_get_offset_bytes(print_data, &iter); pango_attr_list_insert(attr_list, attr); } g_slist_free(open_attrs); pango_layout_set_attributes(print_data->layout, attr_list); pango_attr_list_unref(attr_list); } static gboolean printing_is_pango_gdk_color_equal(PangoColor *p, GdkColor *g) { return ((p->red == g->red) && (p->green == g->green) && (p->blue == g->blue)); } /* Pango has it's attribute in bytes, but GtkTextIter gets only an offset * in characters, so here we're returning an offset in bytes. */ static gint printing_text_iter_get_offset_bytes(PrintData *print_data, const GtkTextIter *iter) { gint off_bytes; gchar *text; GtkTextIter start; if (print_data->sel_start < 0 || print_data->sel_end <= print_data->sel_start) { gtk_text_buffer_get_start_iter(gtk_text_iter_get_buffer(iter), &start); } else { gtk_text_buffer_get_iter_at_offset(gtk_text_iter_get_buffer(iter), &start, print_data->sel_start); } text = gtk_text_iter_get_text(&start, iter); off_bytes = strlen(text); g_free(text); return off_bytes; } static void printing_preview_update_zoom_sensitivity(PreviewData *preview_data) { if((preview_data->print_data->zoom * PREVIEW_ZOOM_FAC) > PREVIEW_ZOOM_MAX) gtk_widget_set_sensitive(preview_data->zoom_in, FALSE); else gtk_widget_set_sensitive(preview_data->zoom_in, TRUE); if ((preview_data->print_data->zoom / PREVIEW_ZOOM_FAC) < PREVIEW_ZOOM_MIN) gtk_widget_set_sensitive(preview_data->zoom_out, FALSE); else gtk_widget_set_sensitive(preview_data->zoom_out, TRUE); }