Desktop
/* $Id: pdfviewer.c,v 1.3 2011/05/14 19:50:06 khorben Exp $ */
static char const _copyright[] =
"Copyright (c) 2010 Sébastien Bocahu <zecrazytux@zecrazytux.net>";
static char const _license[] =
"This program is free software; you can redistribute it and/or modify\n"
"it under the terms of the GNU General Public License as published by the\n"
"Free Software Foundation, version 3 of the License.\n"
"\n"
"This program is distributed in the hope that it will be useful,\n"
"but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
"GNU General Public License for more details.\n"
"\n"
"You should have received a copy of the GNU General Public License\n"
"along with this program. If not, see <http://www.gnu.org/licenses/>.\n";
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <math.h>
#include <gdk/gdkkeysyms.h>
#include <poppler.h>
#include <Desktop.h>
#include "callbacks.h"
#include "pdfviewer.h"
#include "../config.h"
/* PDFviewer */
/* private */
/* types */
struct _PDFviewer
{
PDF * pdf;
/* widgets */
GtkWidget * window;
GtkWidget * view;
GtkWidget * statusbar;
GtkWidget * toolbar;
/* about */
GtkWidget * ab_window;
};
struct _PDF
{
PopplerDocument *document;
int pages;
int current;
GtkWidget *area;
cairo_surface_t *surface;
double scale;
};
/* variables */
static char const * _authors[] =
{
"Sébastien Bocahu <zecrazytux@zecrazytux.net>",
NULL
};
#ifdef EMBEDDED
static DesktopAccel _pdfviewer_accel[] =
{
{ G_CALLBACK(on_pdf_close), GDK_CONTROL_MASK, GDK_w },
{ G_CALLBACK(on_open), GDK_CONTROL_MASK, GDK_o },
{ G_CALLBACK(on_previous), GDK_CONTROL_MASK, GDK_p },
{ G_CALLBACK(on_next), GDK_CONTROL_MASK, GDK_n },
{ NULL, 0, 0 }
};
#endif
#ifndef EMBEDDED
static DesktopMenu _pdfviewer_menu_file[] =
{
{ "_Open", G_CALLBACK(on_file_open), GTK_STOCK_OPEN, GDK_CONTROL_MASK,
GDK_o },
{ "", NULL, NULL, 0, 0 },
{ "_Close", G_CALLBACK(on_file_close), GTK_STOCK_CLOSE,
GDK_CONTROL_MASK, GDK_w },
{ NULL, NULL, NULL, 0, 0 }
};
static DesktopMenu _pdfviewer_menu_edit[] =
{
{ NULL, NULL, NULL, 0, 0 }
};
static DesktopMenu _pdfviewer_menu_view[] =
{
{ NULL, NULL, NULL, 0, 0 }
};
static DesktopMenu _pdfviewer_menu_help[] =
{
{ "_About", G_CALLBACK(on_help_about),
#if GTK_CHECK_VERSION(2, 6, 0)
GTK_STOCK_ABOUT, 0, 0 },
#else
NULL, 0, 0 },
#endif
{ NULL, NULL, NULL, 0, 0 }
};
static DesktopMenubar _pdfviewer_menubar[] =
{
{ "_File", _pdfviewer_menu_file },
{ "_Edit", _pdfviewer_menu_edit },
{ "_View", _pdfviewer_menu_view },
{ "_Help", _pdfviewer_menu_help },
{ NULL, NULL }
};
#endif
static DesktopToolbar _pdfviewer_toolbar[] =
{
{ "Open", G_CALLBACK(on_open), GTK_STOCK_OPEN, 0, 0, NULL },
{ "FarBefore", G_CALLBACK(on_far_before), GTK_STOCK_MEDIA_PREVIOUS,
0, 0, NULL },
{ "Previous", G_CALLBACK(on_previous), GTK_STOCK_GO_BACK,
0, 0, NULL },
{ "Next", G_CALLBACK(on_next), GTK_STOCK_GO_FORWARD, 0, 0, NULL },
{ "FarAfter", G_CALLBACK(on_far_after), GTK_STOCK_MEDIA_NEXT, 0, 0, NULL },
{ "ZoomIn", G_CALLBACK(on_zoom_in), GTK_STOCK_ZOOM_IN, 0, 0, NULL },
{ "ZoomOut", G_CALLBACK(on_zoom_out), GTK_STOCK_ZOOM_OUT, 0, 0, NULL },
{ NULL, NULL, NULL, 0, 0, NULL }
};
/* public */
/* functions */
/* pdfviewer_new */
static void _new_set_title(PDFviewer * pdfviewer);
PDFviewer * pdfviewer_new(void)
{
PDFviewer * pdfviewer;
GtkAccelGroup * group;
GtkSettings * settings;
GtkWidget * vbox;
GtkWidget * widget;
if((pdfviewer = malloc(sizeof(*pdfviewer))) == NULL)
return NULL;
settings = gtk_settings_get_default();
pdfviewer->pdf = NULL;
/* widgets */
group = gtk_accel_group_new();
pdfviewer->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_add_accel_group(GTK_WINDOW(pdfviewer->window), group);
gtk_window_set_default_size(GTK_WINDOW(pdfviewer->window), 600, 400);
_new_set_title(pdfviewer);
#if GTK_CHECK_VERSION(2, 6, 0)
gtk_window_set_icon_name(GTK_WINDOW(pdfviewer->window),
"gnome-mime-application-pdf");
#endif
g_signal_connect_swapped(G_OBJECT(pdfviewer->window), "delete-event",
G_CALLBACK(on_closex), pdfviewer);
vbox = gtk_vbox_new(FALSE, 0);
/* menubar */
#ifndef EMBEDDED
widget = desktop_menubar_create(_pdfviewer_menubar, pdfviewer, group);
gtk_box_pack_start(GTK_BOX(vbox), widget, FALSE, FALSE, 0);
#else
desktop_accel_create(_pdfviewer_accel, pdfviewer, group);
#endif
/* toolbar */
pdfviewer->toolbar = desktop_toolbar_create(_pdfviewer_toolbar,
pdfviewer, group);
set_prevnext_sensitivity(pdfviewer);
gtk_box_pack_start(GTK_BOX(vbox), pdfviewer->toolbar, FALSE, FALSE, 0);
/* view */
widget = gtk_scrolled_window_new(NULL, NULL);
gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(widget),
GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
pdfviewer->view = gtk_drawing_area_new();
gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(widget),
pdfviewer->view);
gtk_box_pack_start(GTK_BOX(vbox), widget, TRUE, TRUE, 0);
/* statusbar */
pdfviewer->statusbar = gtk_statusbar_new();
gtk_box_pack_start(GTK_BOX(vbox), pdfviewer->statusbar,
FALSE, FALSE, 0);
/* about */
pdfviewer->ab_window = NULL;
gtk_container_add(GTK_CONTAINER(pdfviewer->window), vbox);
gtk_widget_show_all(pdfviewer->window);
return pdfviewer;
}
static void _new_set_title(PDFviewer * pdfviewer)
{
char buf[256];
snprintf(buf, sizeof(buf), "%s%s", "PDF viewer - ",
(pdfviewer->pdf == NULL) ? "(Untitled)"
: "FIXME"); /* FIXME */
gtk_window_set_title(GTK_WINDOW(pdfviewer->window), buf);
}
/* pdfviewer_delete */
void pdfviewer_delete(PDFviewer * pdfviewer)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
#if 0 /* FIXME */
if(pdfviewer->pdf != NULL)
pdf_delete(pdfviewer->pdf);
#endif
free(pdfviewer);
}
/* useful */
/* pdfviewer_about */
static gboolean _about_on_closex(GtkWidget * widget);
void pdfviewer_about(PDFviewer * pdfviewer)
{
if(pdfviewer->ab_window != NULL)
{
gtk_widget_show(pdfviewer->ab_window);
return;
}
pdfviewer->ab_window = desktop_about_dialog_new();
gtk_window_set_transient_for(GTK_WINDOW(pdfviewer->ab_window),
GTK_WINDOW(pdfviewer->window));
g_signal_connect(G_OBJECT(pdfviewer->ab_window), "delete-event",
G_CALLBACK(_about_on_closex), NULL);
desktop_about_dialog_set_authors(pdfviewer->ab_window, _authors);
desktop_about_dialog_set_copyright(pdfviewer->ab_window, _copyright);
desktop_about_dialog_set_license(pdfviewer->ab_window, _license);
desktop_about_dialog_set_logo_icon_name(pdfviewer->ab_window,
"document-print-preview");
desktop_about_dialog_set_name(pdfviewer->ab_window, PACKAGE);
desktop_about_dialog_set_version(pdfviewer->ab_window, VERSION);
gtk_widget_show(pdfviewer->ab_window);
}
static gboolean _about_on_closex(GtkWidget * widget)
{
gtk_widget_hide(widget);
return TRUE;
}
/* pdfviewer_error */
int pdfviewer_error(PDFviewer * pdfviewer, char const * message, int ret)
{
GtkWidget * dialog;
dialog = gtk_message_dialog_new(GTK_WINDOW(pdfviewer->window),
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE,
#if GTK_CHECK_VERSION(2, 6, 0)
"%s", "Error");
gtk_message_dialog_format_secondary_text(GTK_MESSAGE_DIALOG(dialog),
#endif
"%s", message);
gtk_window_set_title(GTK_WINDOW(dialog), "Error");
g_signal_connect(G_OBJECT(dialog), "response", G_CALLBACK(
gtk_widget_destroy), NULL);
gtk_widget_show(dialog);
return ret;
}
/* pdfviewer_close */
gboolean pdfviewer_close(PDFviewer * pdfviewer)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
/* FIXME implement */
gtk_main_quit();
return FALSE;
}
/* pdfviewer_open */
void pdfviewer_open(PDFviewer * pdfviewer, char const * uri)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
/* FIXME handle errors */
if(uri == NULL)
return;
if(pdfviewer->pdf != NULL)
pdf_close(pdfviewer);
if(pdf_open(pdfviewer, uri) != 0)
return;
_new_set_title(pdfviewer); /* XXX make it a generic private function */
}
/* pdfviewer_open_dialog */
void pdfviewer_open_dialog(PDFviewer * pdfviewer)
{
GtkWidget * dialog;
char * uri = NULL;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
dialog = gtk_file_chooser_dialog_new("Open file...",
GTK_WINDOW(pdfviewer->window),
GTK_FILE_CHOOSER_ACTION_OPEN,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT, NULL);
if(gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_ACCEPT)
uri = gtk_file_chooser_get_uri(GTK_FILE_CHOOSER(
dialog));
gtk_widget_destroy(dialog);
if(uri == NULL)
return;
pdfviewer_open(pdfviewer, uri);
g_free(uri);
}
/* pdf_open */
int pdf_open(PDFviewer * pdfviewer, const char * uri)
{
GError * err = NULL;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
pdfviewer->pdf = g_new0(PDF, 1);
pdfviewer->pdf->document =
poppler_document_new_from_file(uri, NULL, &err);
if(err != NULL) {
fprintf(stderr, "error: %s", err->message);
g_error_free (err);
return 1;
}
pdfviewer->pdf->pages =
poppler_document_get_n_pages(pdfviewer->pdf->document);
pdf_update_current(pdfviewer, '=', 0);
/* pdfviewer->pdf->scale = 1.0;
*/
pdf_load_page(pdfviewer);
return 0;
}
/* pdf_close */
void pdf_close(PDFviewer * pdfviewer)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
gdk_window_clear(gtk_widget_get_window(pdfviewer->view));
if(pdfviewer->pdf != NULL)
free(pdfviewer->pdf);
}
/* pdf_load_page */
void pdf_load_page(PDFviewer * pdfviewer)
{
PopplerPage *page;
cairo_t *cr;
gdouble width, height;
GtkAllocation view_allocation;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
page = poppler_document_get_page(pdfviewer->pdf->document,
pdfviewer->pdf->current);
poppler_page_get_size(page, &width, &height);
if(!pdfviewer->pdf->scale) {
/* gdk_drawable_get_size(gtk_widget_get_window(pdfviewer->view), &w, &h); */
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() scale not set!\n", __func__);
#endif
gtk_widget_get_allocation(pdfviewer->view, &view_allocation);
pdfviewer->pdf->scale = ((view_allocation.width - 20) / width);
#if 0
pdfviewer->pdf->scale = (view_allocation.height / height); /* view whole page */
#endif
}
if (!page)
return;
gtk_statusbar_push(GTK_STATUSBAR(pdfviewer->statusbar),
gtk_statusbar_get_context_id(
GTK_STATUSBAR(pdfviewer->statusbar), "read-page"),
g_strdup_printf("Page %d/%d",
pdfviewer->pdf->current + 1, pdfviewer->pdf->pages));
if (pdfviewer->pdf->surface)
cairo_surface_destroy (pdfviewer->pdf->surface);
pdfviewer->pdf->surface = NULL;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() scale: %f\n", __func__,
pdfviewer->pdf->scale);
#endif
pdfviewer->pdf->surface = cairo_image_surface_create(
CAIRO_FORMAT_ARGB32, ceil(pdfviewer->pdf->scale * width),
ceil(pdfviewer->pdf->scale * height));
cr = cairo_create(pdfviewer->pdf->surface);
cairo_save(cr);
cairo_scale(cr, pdfviewer->pdf->scale, pdfviewer->pdf->scale);
poppler_page_render(page, cr);
cairo_restore(cr);
cairo_destroy(cr);
g_object_unref(page);
g_signal_connect(G_OBJECT(pdfviewer->view), "expose-event",
G_CALLBACK(pdf_render_area),
(gpointer) pdfviewer->pdf);
gtk_widget_set_size_request(pdfviewer->view,
pdfviewer->pdf->scale * ceil(width),
pdfviewer->pdf->scale * ceil(height));
gtk_widget_queue_draw(pdfviewer->view);
}
/* pdf_render_area */
void pdf_render_area(GtkWidget *area, GdkEventExpose *event, void * data)
{
PDF * pdf = data;
cairo_t *cr;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
gdk_window_clear(gtk_widget_get_window(area));
if(pdf == NULL)
return;
cr = gdk_cairo_create(gtk_widget_get_window(area));
cairo_set_source_surface(cr, pdf->surface, 0, 0);
cairo_paint(cr);
cairo_destroy(cr);
}
/* pdf_update_current */
void pdf_update_current(PDFviewer * pdfviewer, const char op, int n)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
switch(op) {
case '=': if((n >= 0) &&
(n <= (pdfviewer->pdf->pages - 1)))
pdfviewer->pdf->current = n;
break;
case '+': if((pdfviewer->pdf->current + n)
<= pdfviewer->pdf->pages)
pdfviewer->pdf->current =
pdfviewer->pdf->current + n;
break;
case '-': if((pdfviewer->pdf->current - n) >= 0)
pdfviewer->pdf->current =
pdfviewer->pdf->current - n;
break;
}
set_prevnext_sensitivity(pdfviewer);
}
/* set_prevnext_sensitivity */
void set_prevnext_sensitivity(PDFviewer * pdfviewer)
{
gboolean farbefore, prev, next, farafter;
if(pdfviewer->pdf) { /* XXX s/5/preferences/ */
farbefore = (pdfviewer->pdf->current > 5) ? TRUE : FALSE;
prev = (pdfviewer->pdf->current > 0) ? TRUE : FALSE;
next = (pdfviewer->pdf->current+1 < pdfviewer->pdf->pages) ?
TRUE : FALSE;
farafter = (pdfviewer->pdf->current+5 < pdfviewer->pdf->pages) ?
TRUE : FALSE;
} else {
farbefore = FALSE;
prev = FALSE;
next = FALSE;
farafter = FALSE;
}
gtk_widget_set_sensitive(GTK_WIDGET(
gtk_toolbar_get_nth_item(GTK_TOOLBAR(pdfviewer->toolbar), 1)
), farbefore);
gtk_widget_set_sensitive(GTK_WIDGET(
gtk_toolbar_get_nth_item(GTK_TOOLBAR(pdfviewer->toolbar), 2)
), prev);
gtk_widget_set_sensitive(GTK_WIDGET(
gtk_toolbar_get_nth_item(GTK_TOOLBAR(pdfviewer->toolbar), 3)
), next);
gtk_widget_set_sensitive(GTK_WIDGET(
gtk_toolbar_get_nth_item(GTK_TOOLBAR(pdfviewer->toolbar), 4)
), farafter);
}
/* pdf_update_scale */
void pdf_update_scale(PDFviewer * pdfviewer, const char op, double n)
{
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
switch(op) {
case '=': pdfviewer->pdf->scale = n;
break;
case '+': pdfviewer->pdf->scale =
pdfviewer->pdf->scale + n;
break;
case '-': if((pdfviewer->pdf->scale - n) > 0)
pdfviewer->pdf->scale =
pdfviewer->pdf->scale - n;
break;
}
pdf_load_page(pdfviewer);
}