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PIKApp/plug-ins/common/file-pdf-load.c

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Initial checkin of Pika from heckimp
2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
*
* file-pdf-load.c - PDF file loader
*
* Copyright (C) 2005 Nathan Summers
*
* Some code in render_page_to_surface() borrowed from
* poppler.git/glib/poppler-page.cc.
*
* 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 <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <libpika/pika.h>
#include <libpika/pikaui.h>
#undef GTK_DISABLE_SINGLE_INCLUDES
#include <poppler.h>
#define GTK_DISABLE_SINGLE_INCLUDES
#include "libpika/stdplugins-intl.h"
/**
** the following was formerly part of
** pikaresolutionentry.h and pikaresolutionentry.c,
** moved here because this is the only thing that uses
** it, and it is undesirable to maintain all that api.
** Most unused functions have been removed.
**/
#define PIKA_TYPE_RESOLUTION_ENTRY (pika_resolution_entry_get_type ())
#define PIKA_RESOLUTION_ENTRY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), PIKA_TYPE_RESOLUTION_ENTRY, PikaResolutionEntry))
#define PIKA_RESOLUTION_ENTRY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PIKA_TYPE_RESOLUTION_ENTRY, PikaResolutionEntryClass))
#define PIKA_IS_RESOLUTION_ENTRY(obj) (G_TYPE_CHECK_INSTANCE_TYPE (obj, PIKA_TYPE_RESOLUTION_ENTRY))
#define PIKA_IS_RESOLUTION_ENTRY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PIKA_TYPE_RESOLUTION_ENTRY))
#define PIKA_RESOLUTION_ENTRY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PIKA_TYPE_RESOLUTION_ENTRY, PikaResolutionEntryClass))
typedef struct _PikaResolutionEntry PikaResolutionEntry;
typedef struct _PikaResolutionEntryClass PikaResolutionEntryClass;
typedef struct _PikaResolutionEntryField PikaResolutionEntryField;
struct _PikaResolutionEntryField
{
PikaResolutionEntry *gre;
PikaResolutionEntryField *corresponding;
gboolean size;
GtkWidget *label;
guint changed_signal;
GtkAdjustment *adjustment;
GtkWidget *spinbutton;
gdouble phy_size;
gdouble value;
gdouble min_value;
gdouble max_value;
gint stop_recursion;
};
struct _PikaResolutionEntry
{
GtkGrid parent_instance;
PikaUnit size_unit;
PikaUnit unit;
GtkWidget *unitmenu;
GtkWidget *chainbutton;
PikaResolutionEntryField width;
PikaResolutionEntryField height;
PikaResolutionEntryField x;
PikaResolutionEntryField y;
};
struct _PikaResolutionEntryClass
{
GtkGridClass parent_class;
void (* value_changed) (PikaResolutionEntry *gse);
void (* refval_changed) (PikaResolutionEntry *gse);
void (* unit_changed) (PikaResolutionEntry *gse);
};
GType pika_resolution_entry_get_type (void) G_GNUC_CONST;
GtkWidget * pika_resolution_entry_new (const gchar *width_label,
gdouble width,
const gchar *height_label,
gdouble height,
PikaUnit size_unit,
const gchar *res_label,
gdouble initial_res,
PikaUnit initial_unit);
GtkWidget * pika_resolution_entry_attach_label (PikaResolutionEntry *gre,
const gchar *text,
gint row,
gint column,
gfloat alignment);
gdouble pika_resolution_entry_get_x_in_dpi (PikaResolutionEntry *gre);
gdouble pika_resolution_entry_get_y_in_dpi (PikaResolutionEntry *gre);
/* signal callback convenience functions */
void pika_resolution_entry_update_x_in_dpi (PikaResolutionEntry *gre,
gpointer data);
void pika_resolution_entry_update_y_in_dpi (PikaResolutionEntry *gre,
gpointer data);
enum
{
WIDTH_CHANGED,
HEIGHT_CHANGED,
X_CHANGED,
Y_CHANGED,
UNIT_CHANGED,
LAST_SIGNAL
};
static void pika_resolution_entry_class_init (PikaResolutionEntryClass *class);
static void pika_resolution_entry_init (PikaResolutionEntry *gre);
static void pika_resolution_entry_update_value (PikaResolutionEntryField *gref,
gdouble value);
static void pika_resolution_entry_value_callback (GtkAdjustment *adjustment,
gpointer data);
static void pika_resolution_entry_update_unit (PikaResolutionEntry *gre,
PikaUnit unit);
static void pika_resolution_entry_unit_callback (GtkWidget *widget,
PikaResolutionEntry *gre);
static void pika_resolution_entry_field_init (PikaResolutionEntry *gre,
PikaResolutionEntryField *gref,
PikaResolutionEntryField *corresponding,
guint changed_signal,
gdouble initial_val,
PikaUnit initial_unit,
gboolean size,
gint spinbutton_width);
static void pika_resolution_entry_format_label (PikaResolutionEntry *gre,
GtkWidget *label,
gdouble size);
/**
** end of pikaresolutionentry stuff
** the actual code can be found at the end of this file
**/
#define LOAD_PROC "file-pdf-load"
#define LOAD_THUMB_PROC "file-pdf-load-thumb"
#define PLUG_IN_BINARY "file-pdf-load"
#define PLUG_IN_ROLE "pika-file-pdf-load"
#define THUMBNAIL_SIZE 128
#define PIKA_PLUGIN_PDF_LOAD_ERROR pika_plugin_pdf_load_error_quark ()
static GQuark
pika_plugin_pdf_load_error_quark (void)
{
return g_quark_from_static_string ("pika-plugin-pdf-load-error-quark");
}
typedef struct
{
gint n_pages;
gint *pages;
} PdfSelectedPages;
typedef struct _Pdf Pdf;
typedef struct _PdfClass PdfClass;
struct _Pdf
{
PikaPlugIn parent_instance;
};
struct _PdfClass
{
PikaPlugInClass parent_class;
};
#define PDF_TYPE (pdf_get_type ())
#define PDF (obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), PDF_TYPE, Pdf))
GType pdf_get_type (void) G_GNUC_CONST;
static GList * pdf_query_procedures (PikaPlugIn *plug_in);
static PikaProcedure * pdf_create_procedure (PikaPlugIn *plug_in,
const gchar *name);
static PikaValueArray * pdf_load (PikaProcedure *procedure,
PikaRunMode run_mode,
GFile *file,
const PikaValueArray *args,
gpointer run_data);
static PikaValueArray * pdf_load_thumb (PikaProcedure *procedure,
GFile *file,
gint size,
const PikaValueArray *args,
gpointer run_data);
static PikaImage * load_image (PopplerDocument *doc,
GFile *file,
PikaRunMode run_mode,
PikaPageSelectorTarget target,
gdouble resolution,
gboolean antialias,
gboolean white_background,
gboolean reverse_order,
PdfSelectedPages *pages);
static PikaPDBStatusType load_dialog (PopplerDocument *doc,
PdfSelectedPages *pages,
PikaProcedure *procedure,
PikaProcedureConfig *config);
static PopplerDocument * open_document (GFile *file,
const gchar *PDF_password,
PikaRunMode run_mode,
GError **error);
static cairo_surface_t * get_thumb_surface (PopplerDocument *doc,
gint page,
gint preferred_size,
gboolean white_background);
static GdkPixbuf * get_thumb_pixbuf (PopplerDocument *doc,
gint page,
gint preferred_size,
gboolean white_background);
static PikaLayer * layer_from_surface (PikaImage *image,
const gchar *layer_name,
gint position,
cairo_surface_t *surface,
gdouble progress_start,
gdouble progress_scale);
G_DEFINE_TYPE (Pdf, pdf, PIKA_TYPE_PLUG_IN)
PIKA_MAIN (PDF_TYPE)
DEFINE_STD_SET_I18N
static void
pdf_class_init (PdfClass *klass)
{
PikaPlugInClass *plug_in_class = PIKA_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = pdf_query_procedures;
plug_in_class->create_procedure = pdf_create_procedure;
plug_in_class->set_i18n = STD_SET_I18N;
}
static void
pdf_init (Pdf *pdf)
{
}
static GList *
pdf_query_procedures (PikaPlugIn *plug_in)
{
GList *list = NULL;
list = g_list_append (list, g_strdup (LOAD_THUMB_PROC));
list = g_list_append (list, g_strdup (LOAD_PROC));
return list;
}
static PikaProcedure *
pdf_create_procedure (PikaPlugIn *plug_in,
const gchar *name)
{
PikaProcedure *procedure = NULL;
if (! strcmp (name, LOAD_PROC))
{
procedure = pika_load_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
pdf_load, NULL, NULL);
pika_procedure_set_menu_label (procedure, _("Portable Document Format"));
pika_procedure_set_documentation (procedure,
"Load file in PDF format",
"Loads files in Adobe's Portable "
"Document Format. PDF is designed to "
"be easily processed by a variety "
"of different platforms, and is a "
"distant cousin of PostScript.",
name);
pika_procedure_set_attribution (procedure,
"Nathan Summers, Lionel N.",
"Nathan Summers, Lionel N.",
"2005, 2017");
pika_file_procedure_set_mime_types (PIKA_FILE_PROCEDURE (procedure),
"application/pdf");
pika_file_procedure_set_extensions (PIKA_FILE_PROCEDURE (procedure),
"pdf");
pika_file_procedure_set_magics (PIKA_FILE_PROCEDURE (procedure),
"0, string,%PDF-");
pika_load_procedure_set_thumbnail_loader (PIKA_LOAD_PROCEDURE (procedure),
LOAD_THUMB_PROC);
PIKA_PROC_ARG_STRING (procedure, "password",
_("PDF password"),
_("The password to decrypt the encrypted PDF file"),
NULL,
G_PARAM_READWRITE);
PIKA_PROC_ARG_BOOLEAN (procedure, "reverse-order",
_("Load in re_verse order"),
_("Load PDF pages in reverse order"),
FALSE,
G_PARAM_READWRITE);
/* FIXME: this should be a PIKA_PROC_ARG_ENUM of type
* PIKA_TYPE_PAGE_SELECTOR_TARGET but it won't work right now (see FIXME
* comment in libpika/pikagpparams-body.c:116).
PIKA_PROC_ARG_ENUM (procedure, "target",
_("Open pages as"),
_("Number of pages to load (0 for all)"),
PIKA_TYPE_PAGE_SELECTOR_TARGET,
PIKA_PAGE_SELECTOR_TARGET_LAYERS,
G_PARAM_READWRITE);
*/
PIKA_PROC_AUX_ARG_INT (procedure, "target",
_("Open pages as"),
_("Number of pages to load (0 for all)"),
PIKA_PAGE_SELECTOR_TARGET_LAYERS, PIKA_PAGE_SELECTOR_TARGET_IMAGES,
PIKA_PAGE_SELECTOR_TARGET_LAYERS,
G_PARAM_READWRITE);
PIKA_PROC_ARG_INT (procedure, "n-pages",
_("N pages"),
_("Number of pages to load (0 for all)"),
0, G_MAXINT, 0,
G_PARAM_READWRITE);
/* FIXME: shouldn't the whole selector be considered as one argument
* containing properties "target", "n-pages" and "pages" as a single
* object?
* Or actually should we store pages at all? While it makes sense to store
* some settings generally, not sure that the list of page makes sense
* from one PDF document loaded to another (different) one.
*/
PIKA_PROC_ARG_INT32_ARRAY (procedure, "pages",
_("Pages"),
_("The pages to load in the expected order"),
G_PARAM_READWRITE);
PIKA_PROC_ARG_BOOLEAN (procedure, "antialias",
_("Use _Anti-aliasing"),
_("Render texts with anti-aliasing"),
TRUE,
G_PARAM_READWRITE);
PIKA_PROC_ARG_BOOLEAN (procedure, "white-background",
_("_Fill transparent areas with white"),
_("Render all pages as opaque by filling the background in white"),
TRUE,
G_PARAM_READWRITE);
/* FIXME: we will have to think a bit about the most reasonable API. In any
* case, just "resolution" makes no sense without width/height.
*/
PIKA_PROC_AUX_ARG_DOUBLE (procedure, "resolution",
_("Resolution"),
_("Resolution"),
1.0, 5000.0, 300.0,
G_PARAM_READWRITE);
}
else if (! strcmp (name, LOAD_THUMB_PROC))
{
procedure = pika_thumbnail_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
pdf_load_thumb, NULL, NULL);
pika_procedure_set_documentation (procedure,
"Loads a preview from a PDF file.",
"Loads a small preview of the first "
"page of the PDF format file. Uses "
"the embedded thumbnail if present.",
name);
pika_procedure_set_attribution (procedure,
"Nathan Summers",
"Nathan Summers",
"2005");
}
return procedure;
}
static PikaValueArray *
pdf_load (PikaProcedure *procedure,
PikaRunMode run_mode,
GFile *file,
const PikaValueArray *args,
gpointer run_data)
{
PikaValueArray *return_vals;
PikaPDBStatusType status = PIKA_PDB_SUCCESS;
PikaProcedureConfig *config;
PikaImage *image = NULL;
PopplerDocument *doc = NULL;
PdfSelectedPages pages = { 0, NULL };
GError *error = NULL;
gegl_init (NULL, NULL);
config = pika_procedure_create_config (procedure);
pika_procedure_config_begin_run (config, NULL, run_mode, args);
switch (run_mode)
{
case PIKA_RUN_INTERACTIVE:
{
gchar *password;
pika_ui_init (PLUG_IN_BINARY);
g_object_get (config,
"password", &password,
NULL);
doc = open_document (file,
password,
run_mode, &error);
g_free (password);
if (! doc)
{
status = PIKA_PDB_EXECUTION_ERROR;
break;
}
status = load_dialog (doc, &pages, procedure, config);
}
break;
case PIKA_RUN_WITH_LAST_VALS:
/* FIXME: implement last vals mode */
status = PIKA_PDB_EXECUTION_ERROR;
break;
case PIKA_RUN_NONINTERACTIVE:
doc = open_document (file,
PIKA_VALUES_GET_STRING (args, 0),
run_mode, &error);
if (doc)
{
PopplerPage *test_page = poppler_document_get_page (doc, 0);
if (test_page)
{
gint i;
gint doc_n_pages;
doc_n_pages = poppler_document_get_n_pages (doc);
/* The number of imported pages may be bigger than
* the number of pages from the original document.
* Indeed it is possible to duplicate some pages
* by setting the same number several times in the
* "pages" argument.
* Not ceiling this value is *not* an error.
*/
pages.n_pages = PIKA_VALUES_GET_INT (args, 2);
if (pages.n_pages <= 0)
{
pages.n_pages = doc_n_pages;
pages.pages = g_new (gint, pages.n_pages);
for (i = 0; i < pages.n_pages; i++)
pages.pages[i] = i;
}
else
{
const gint32 *p = PIKA_VALUES_GET_INT32_ARRAY (args, 3);
pages.pages = g_new (gint, pages.n_pages);
for (i = 0; i < pages.n_pages; i++)
{
if (p[i] >= doc_n_pages)
{
status = PIKA_PDB_EXECUTION_ERROR;
g_set_error (&error, PIKA_PLUGIN_PDF_LOAD_ERROR, 0,
/* TRANSLATORS: first argument is file name,
* second is out-of-range page number,
* third is number of pages.
* Specify order as in English if needed.
*/
ngettext ("PDF document '%1$s' has %3$d page. Page %2$d is out of range.",
"PDF document '%1$s' has %3$d pages. Page %2$d is out of range.",
doc_n_pages),
pika_file_get_utf8_name (file),
p[i],
doc_n_pages);
break;
}
else
{
pages.pages[i] = p[i];
}
}
}
g_object_unref (test_page);
}
}
else
{
status = PIKA_PDB_EXECUTION_ERROR;
g_object_unref (doc);
}
break;
}
if (status == PIKA_PDB_SUCCESS)
{
PikaPageSelectorTarget target;
gboolean reverse_order;
gdouble resolution;
gboolean antialias;
gboolean white_background;
g_object_get (config,
"target", &target,
"reverse-order", &reverse_order,
"resolution", &resolution,
"antialias", &antialias,
"white-background", &white_background,
NULL);
image = load_image (doc,
file,
run_mode,
target,
resolution,
antialias,
white_background,
reverse_order,
&pages);
if (image == NULL)
status = PIKA_PDB_EXECUTION_ERROR;
}
if (doc)
g_object_unref (doc);
pika_procedure_config_end_run (config, status);
g_object_unref (config);
g_free (pages.pages);
return_vals = pika_procedure_new_return_values (procedure, status, error);
if (status == PIKA_PDB_SUCCESS)
PIKA_VALUES_SET_IMAGE (return_vals, 1, image);
return return_vals;
}
static PikaValueArray *
pdf_load_thumb (PikaProcedure *procedure,
GFile *file,
gint size,
const PikaValueArray *args,
gpointer run_data)
{
PikaValueArray *return_vals;
gdouble width = 0;
gdouble height = 0;
gdouble scale;
PikaImage *image = NULL;
gint num_pages = 0;
PopplerDocument *doc = NULL;
cairo_surface_t *surface = NULL;
GError *error = NULL;
gegl_init (NULL, NULL);
doc = open_document (file,
NULL,
PIKA_RUN_NONINTERACTIVE,
&error);
if (doc)
{
PopplerPage *page = poppler_document_get_page (doc, 0);
if (page)
{
poppler_page_get_size (page, &width, &height);
g_object_unref (page);
}
num_pages = poppler_document_get_n_pages (doc);
surface = get_thumb_surface (doc, 0, size, TRUE);
g_object_unref (doc);
}
if (surface)
{
image = pika_image_new (cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface),
PIKA_RGB);
pika_image_undo_disable (image);
layer_from_surface (image, "thumbnail", 0, surface, 0.0, 1.0);
cairo_surface_destroy (surface);
pika_image_undo_enable (image);
pika_image_clean_all (image);
}
/* Thumbnail resolution: 100.0. */
scale = 100.0 / pika_unit_get_factor (PIKA_UNIT_POINT);
width *= scale;
height *= scale;
if (! image)
return pika_procedure_new_return_values (procedure,
PIKA_PDB_EXECUTION_ERROR,
error);
return_vals = pika_procedure_new_return_values (procedure,
PIKA_PDB_SUCCESS,
NULL);
PIKA_VALUES_SET_IMAGE (return_vals, 1, image);
PIKA_VALUES_SET_INT (return_vals, 2, width);
PIKA_VALUES_SET_INT (return_vals, 3, height);
PIKA_VALUES_SET_ENUM (return_vals, 4, PIKA_RGB_IMAGE);
PIKA_VALUES_SET_INT (return_vals, 5, num_pages);
return return_vals;
}
static PopplerDocument *
open_document (GFile *file,
const gchar *PDF_password,
PikaRunMode run_mode,
GError **load_error)
{
PopplerDocument *doc;
GError *error = NULL;
doc = poppler_document_new_from_gfile (file, PDF_password, NULL, &error);
if (run_mode == PIKA_RUN_INTERACTIVE)
{
GtkWidget *label;
label = gtk_label_new (_("PDF is password protected, please input the password:"));
while (error &&
error->domain == POPPLER_ERROR &&
error->code == POPPLER_ERROR_ENCRYPTED)
{
GtkWidget *vbox;
GtkWidget *dialog;
GtkWidget *entry;
gint run;
dialog = pika_dialog_new (_("Encrypted PDF"), PLUG_IN_ROLE,
NULL, 0,
NULL, NULL,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("_OK"), GTK_RESPONSE_OK,
NULL);
pika_window_set_transient (GTK_WINDOW (dialog));
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
vbox, TRUE, TRUE, 0);
entry = gtk_entry_new ();
gtk_entry_set_visibility (GTK_ENTRY (entry), FALSE);
gtk_entry_set_activates_default (GTK_ENTRY (entry), TRUE);
gtk_container_add (GTK_CONTAINER (vbox), label);
gtk_container_add (GTK_CONTAINER (vbox), entry);
gtk_widget_show_all (dialog);
run = pika_dialog_run (PIKA_DIALOG (dialog));
if (run == GTK_RESPONSE_OK)
{
g_clear_error (&error);
doc = poppler_document_new_from_gfile (file,
gtk_entry_get_text (GTK_ENTRY (entry)),
NULL, &error);
}
label = gtk_label_new (_("Wrong password! Please input the right one:"));
gtk_widget_destroy (dialog);
if (run == GTK_RESPONSE_CANCEL || run == GTK_RESPONSE_DELETE_EVENT)
{
break;
}
}
gtk_widget_destroy (label);
}
/* We can't g_mapped_file_unref(mapped_file) as apparently doc has
* references to data in there. No big deal, this is just a
* short-lived plug-in.
*/
if (! doc)
{
g_set_error (load_error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Could not load '%s': %s"),
pika_file_get_utf8_name (file),
error->message);
g_error_free (error);
return NULL;
}
return doc;
}
static PikaLayer *
layer_from_surface (PikaImage *image,
const gchar *layer_name,
gint position,
cairo_surface_t *surface,
gdouble progress_start,
gdouble progress_scale)
{
PikaLayer *layer;
layer = pika_layer_new_from_surface (image, layer_name, surface,
progress_start,
progress_start + progress_scale);
pika_image_insert_layer (image, layer, NULL, position);
return layer;
}
static cairo_surface_t *
render_page_to_surface (PopplerPage *page,
int width,
int height,
double scale,
gboolean antialias,
gboolean white_background)
{
cairo_surface_t *surface;
cairo_t *cr;
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
cr = cairo_create (surface);
cairo_save (cr);
cairo_translate (cr, 0.0, 0.0);
if (scale != 1.0)
cairo_scale (cr, scale, scale);
if (! antialias)
{
cairo_font_options_t *options = cairo_font_options_create ();
cairo_get_font_options (cr, options);
cairo_font_options_set_antialias (options, CAIRO_ANTIALIAS_NONE);
cairo_set_font_options (cr, options);
cairo_font_options_destroy (options);
cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
}
poppler_page_render (page, cr);
cairo_restore (cr);
if (white_background)
{
cairo_set_operator (cr, CAIRO_OPERATOR_DEST_OVER);
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
cairo_paint (cr);
}
cairo_destroy (cr);
return surface;
}
#if 0
/* This is currently unused, but we'll have it here in case the military
wants it. */
static GdkPixbuf *
render_page_to_pixbuf (PopplerPage *page,
int width,
int height,
double scale)
{
GdkPixbuf *pixbuf;
cairo_surface_t *surface;
surface = render_page_to_surface (page, width, height, scale);
pixbuf = gdk_pixbuf_get_from_surface (surface, 0, 0,
cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface));
cairo_surface_destroy (surface);
return pixbuf;
}
#endif
static PikaImage *
load_image (PopplerDocument *doc,
GFile *file,
PikaRunMode run_mode,
PikaPageSelectorTarget target,
gdouble resolution,
gboolean antialias,
gboolean white_background,
gboolean reverse_order,
PdfSelectedPages *pages)
{
PikaImage *image = NULL;
PikaImage **images = NULL;
gint i;
gdouble scale;
gdouble doc_progress = 0;
gint base_index = 0;
gint sign = 1;
if (reverse_order && pages->n_pages > 0)
{
base_index = pages->n_pages - 1;
sign = -1;
}
if (target == PIKA_PAGE_SELECTOR_TARGET_IMAGES)
images = g_new0 (PikaImage *, pages->n_pages);
pika_progress_init_printf (_("Opening '%s'"),
pika_file_get_utf8_name (file));
scale = resolution / pika_unit_get_factor (PIKA_UNIT_POINT);
/* read the file */
for (i = 0; i < pages->n_pages; i++)
{
PopplerPage *page;
gchar *page_label;
gdouble page_width;
gdouble page_height;
cairo_surface_t *surface;
gint width;
gint height;
gint page_index;
page_index = base_index + sign * i;
page = poppler_document_get_page (doc, pages->pages[page_index]);
poppler_page_get_size (page, &page_width, &page_height);
width = page_width * scale;
height = page_height * scale;
g_object_get (G_OBJECT (page), "label", &page_label, NULL);
if (! image)
{
image = pika_image_new (width, height, PIKA_RGB);
pika_image_undo_disable (image);
pika_image_set_resolution (image, resolution, resolution);
}
surface = render_page_to_surface (page, width, height, scale,
antialias, white_background);
layer_from_surface (image, page_label, 0, surface,
doc_progress, 1.0 / pages->n_pages);
g_free (page_label);
cairo_surface_destroy (surface);
doc_progress = (double) (i + 1) / pages->n_pages;
pika_progress_update (doc_progress);
if (target == PIKA_PAGE_SELECTOR_TARGET_IMAGES)
{
images[i] = image;
pika_image_undo_enable (image);
pika_image_clean_all (image);
image = 0;
}
}
pika_progress_update (1.0);
if (image)
{
pika_image_undo_enable (image);
pika_image_clean_all (image);
}
if (target == PIKA_PAGE_SELECTOR_TARGET_IMAGES)
{
if (run_mode != PIKA_RUN_NONINTERACTIVE)
{
/* Display images in reverse order. The last will be
* displayed by PIKA itself
*/
for (i = pages->n_pages - 1; i > 0; i--)
pika_display_new (images[i]);
}
image = images[0];
g_free (images);
}
return image;
}
static cairo_surface_t *
get_thumb_surface (PopplerDocument *doc,
gint page_num,
gint preferred_size,
gboolean white_background)
{
PopplerPage *page;
cairo_surface_t *surface;
page = poppler_document_get_page (doc, page_num);
if (! page)
return NULL;
surface = poppler_page_get_thumbnail (page);
if (! surface)
{
gdouble width;
gdouble height;
gdouble scale;
poppler_page_get_size (page, &width, &height);
scale = (gdouble) preferred_size / MAX (width, height);
width *= scale;
height *= scale;
surface = render_page_to_surface (page, width, height, scale, TRUE, white_background);
}
g_object_unref (page);
return surface;
}
static GdkPixbuf *
get_thumb_pixbuf (PopplerDocument *doc,
gint page_num,
gint preferred_size,
gboolean white_background)
{
cairo_surface_t *surface;
GdkPixbuf *pixbuf;
surface = get_thumb_surface (doc, page_num, preferred_size, white_background);
pixbuf = gdk_pixbuf_get_from_surface (surface, 0, 0,
cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface));
cairo_surface_destroy (surface);
return pixbuf;
}
typedef struct
{
PopplerDocument *document;
PikaPageSelector *selector;
gboolean white_background;
GMutex mutex;
GCond render_thumb;
gboolean stop_thumbnailing;
gboolean render_thumbnails;
} ThreadData;
typedef struct
{
PikaPageSelector *selector;
gint page_no;
GdkPixbuf *pixbuf;
} IdleData;
static gboolean
idle_set_thumbnail (gpointer data)
{
IdleData *idle_data = data;
pika_page_selector_set_page_thumbnail (idle_data->selector,
idle_data->page_no,
idle_data->pixbuf);
g_object_unref (idle_data->pixbuf);
g_free (idle_data);
return FALSE;
}
static gpointer
thumbnail_thread (gpointer data)
{
ThreadData *thread_data = data;
gboolean first_loop = TRUE;
gint n_pages;
gint i;
n_pages = poppler_document_get_n_pages (thread_data->document);
while (TRUE)
{
gboolean white_background;
gboolean stop_thumbnailing;
gboolean render_thumbnails;
g_mutex_lock (&thread_data->mutex);
if (first_loop)
first_loop = FALSE;
else
g_cond_wait (&thread_data->render_thumb, &thread_data->mutex);
stop_thumbnailing = thread_data->stop_thumbnailing;
g_mutex_unlock (&thread_data->mutex);
if (stop_thumbnailing)
break;
g_mutex_lock (&thread_data->mutex);
render_thumbnails = thread_data->render_thumbnails;
white_background = thread_data->white_background;
thread_data->render_thumbnails = FALSE;
g_mutex_unlock (&thread_data->mutex);
/* This handles "spurious wakeup", i.e. cases when g_cond_wait() returned
* even though there was no call asking us to re-render the thumbnails.
* See docs of g_cond_wait().
*/
if (! render_thumbnails)
continue;
for (i = 0; i < n_pages; i++)
{
IdleData *idle_data = g_new0 (IdleData, 1);
gboolean white_background2;
idle_data->selector = thread_data->selector;
idle_data->page_no = i;
/* FIXME get preferred size from somewhere? */
idle_data->pixbuf = get_thumb_pixbuf (thread_data->document, i,
THUMBNAIL_SIZE,
white_background);
g_idle_add (idle_set_thumbnail, idle_data);
g_mutex_lock (&thread_data->mutex);
white_background2 = thread_data->white_background;
stop_thumbnailing = thread_data->stop_thumbnailing;
g_mutex_unlock (&thread_data->mutex);
if (stop_thumbnailing || white_background2 != white_background)
break;
}
if (stop_thumbnailing)
break;
}
return NULL;
}
static void
white_background_toggled (GtkToggleButton *widget,
ThreadData *thread_data)
{
g_mutex_lock (&thread_data->mutex);
thread_data->white_background = gtk_toggle_button_get_active (widget);
thread_data->render_thumbnails = TRUE;
g_cond_signal (&thread_data->render_thumb);
g_mutex_unlock (&thread_data->mutex);
}
static PikaPDBStatusType
load_dialog (PopplerDocument *doc,
PdfSelectedPages *pages,
PikaProcedure *procedure,
PikaProcedureConfig *config)
{
GtkWidget *dialog;
GtkWidget *vbox;
GtkWidget *title;
GtkWidget *selector;
GtkWidget *res_entry;
GtkWidget *white_bg;
ThreadData thread_data;
GThread *thread;
gint i;
gint n_pages;
gdouble width;
gdouble height;
gboolean run;
PikaPageSelectorTarget target;
gdouble resolution;
gboolean white_background;
dialog = pika_procedure_dialog_new (PIKA_PROCEDURE (procedure),
PIKA_PROCEDURE_CONFIG (config),
_("Import from PDF"));
g_object_get (config,
"target", &target,
"resolution", &resolution,
"white-background", &white_background,
NULL);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
vbox, TRUE, TRUE, 0);
gtk_widget_show (vbox);
/* Title */
title = pika_prop_label_new (G_OBJECT (doc), "title");
gtk_label_set_ellipsize (GTK_LABEL (title), PANGO_ELLIPSIZE_END);
gtk_box_pack_start (GTK_BOX (vbox), title, FALSE, FALSE, 0);
/* Page Selector */
selector = pika_page_selector_new ();
gtk_widget_set_size_request (selector, 380, 360);
gtk_box_pack_start (GTK_BOX (vbox), selector, TRUE, TRUE, 0);
gtk_widget_show (selector);
n_pages = poppler_document_get_n_pages (doc);
if (n_pages <= 0)
{
g_message (_("Error getting number of pages from the given PDF file."));
return PIKA_PDB_EXECUTION_ERROR;
}
pika_page_selector_set_n_pages (PIKA_PAGE_SELECTOR (selector), n_pages);
pika_page_selector_set_target (PIKA_PAGE_SELECTOR (selector),
target);
for (i = 0; i < n_pages; i++)
{
PopplerPage *page;
gchar *label;
page = poppler_document_get_page (doc, i);
g_object_get (G_OBJECT (page), "label", &label, NULL);
pika_page_selector_set_page_label (PIKA_PAGE_SELECTOR (selector), i,
label);
if (i == 0)
poppler_page_get_size (page, &width, &height);
g_object_unref (page);
g_free (label);
}
/* Since selecting none will be equivalent to selecting all, this is
* only useful as a feedback for the default behavior of selecting all
* pages. */
pika_page_selector_select_all (PIKA_PAGE_SELECTOR (selector));
g_signal_connect_swapped (selector, "activate",
G_CALLBACK (gtk_window_activate_default),
dialog);
thread_data.document = doc;
thread_data.selector = PIKA_PAGE_SELECTOR (selector);
thread_data.render_thumbnails = TRUE;
thread_data.stop_thumbnailing = FALSE;
thread_data.white_background = white_background;
g_mutex_init (&thread_data.mutex);
g_cond_init (&thread_data.render_thumb);
thread = g_thread_new ("thumbnailer", thumbnail_thread, &thread_data);
pika_procedure_dialog_fill (PIKA_PROCEDURE_DIALOG (dialog),
"reverse-order",
NULL);
/* Resolution */
res_entry = pika_resolution_entry_new (_("_Width (pixels):"), width,
_("_Height (pixels):"), height,
PIKA_UNIT_POINT,
_("_Resolution:"),
resolution, PIKA_UNIT_INCH);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
res_entry, FALSE, FALSE, 0);
gtk_widget_show (res_entry);
g_signal_connect (res_entry, "x-changed",
G_CALLBACK (pika_resolution_entry_update_x_in_dpi),
&resolution);
white_bg = pika_procedure_dialog_get_widget (PIKA_PROCEDURE_DIALOG (dialog),
"white-background", G_TYPE_NONE);
g_signal_connect (white_bg, "toggled",
G_CALLBACK (white_background_toggled), &thread_data);
pika_procedure_dialog_fill (PIKA_PROCEDURE_DIALOG (dialog),
"antialias",
"white-background",
NULL);
run = pika_procedure_dialog_run (PIKA_PROCEDURE_DIALOG (dialog));
target = pika_page_selector_get_target (PIKA_PAGE_SELECTOR (selector));
g_object_set (config,
"target", target,
"resolution", resolution,
NULL);
pages->pages =
pika_page_selector_get_selected_pages (PIKA_PAGE_SELECTOR (selector),
&pages->n_pages);
/* select all if none selected */
if (pages->n_pages == 0)
{
pika_page_selector_select_all (PIKA_PAGE_SELECTOR (selector));
pages->pages =
pika_page_selector_get_selected_pages (PIKA_PAGE_SELECTOR (selector),
&pages->n_pages);
}
/* cleanup */
g_mutex_lock (&thread_data.mutex);
thread_data.stop_thumbnailing = TRUE;
g_cond_signal (&thread_data.render_thumb);
g_mutex_unlock (&thread_data.mutex);
g_thread_join (thread);
g_mutex_clear (&thread_data.mutex);
g_cond_clear (&thread_data.render_thumb);
/* XXX Unsure why, I get some CRITICALs when destroying the dialog, unless I
* unselect all first.
*/
pika_page_selector_unselect_all (PIKA_PAGE_SELECTOR (selector));
gtk_widget_destroy (dialog);
return run ? PIKA_PDB_SUCCESS : PIKA_PDB_CANCEL;
}
/**
** code for PikaResolutionEntry widget, formerly in libpikawidgets
**/
static guint pika_resolution_entry_signals[LAST_SIGNAL] = { 0 };
static GtkGridClass *parent_class = NULL;
GType
pika_resolution_entry_get_type (void)
{
static GType gre_type = 0;
if (! gre_type)
{
const GTypeInfo gre_info =
{
sizeof (PikaResolutionEntryClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) pika_resolution_entry_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (PikaResolutionEntry),
0, /* n_preallocs */
(GInstanceInitFunc) pika_resolution_entry_init,
};
gre_type = g_type_register_static (GTK_TYPE_GRID,
"PikaResolutionEntry",
&gre_info, 0);
}
return gre_type;
}
static void
pika_resolution_entry_class_init (PikaResolutionEntryClass *klass)
{
parent_class = g_type_class_peek_parent (klass);
pika_resolution_entry_signals[HEIGHT_CHANGED] =
g_signal_new ("height-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaResolutionEntryClass, value_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
pika_resolution_entry_signals[WIDTH_CHANGED] =
g_signal_new ("width-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaResolutionEntryClass, value_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
pika_resolution_entry_signals[X_CHANGED] =
g_signal_new ("x-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaResolutionEntryClass, value_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
pika_resolution_entry_signals[Y_CHANGED] =
g_signal_new ("y-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaResolutionEntryClass, refval_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
pika_resolution_entry_signals[UNIT_CHANGED] =
g_signal_new ("unit-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaResolutionEntryClass, unit_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
klass->value_changed = NULL;
klass->refval_changed = NULL;
klass->unit_changed = NULL;
}
static void
pika_resolution_entry_init (PikaResolutionEntry *gre)
{
gre->unitmenu = NULL;
gre->unit = PIKA_UNIT_INCH;
gtk_grid_set_row_spacing (GTK_GRID (gre), 2);
gtk_grid_set_column_spacing (GTK_GRID (gre), 4);
}
static void
pika_resolution_entry_field_init (PikaResolutionEntry *gre,
PikaResolutionEntryField *gref,
PikaResolutionEntryField *corresponding,
guint changed_signal,
gdouble initial_val,
PikaUnit initial_unit,
gboolean size,
gint spinbutton_width)
{
gint digits;
g_return_if_fail (PIKA_IS_RESOLUTION_ENTRY (gre));
gref->gre = gre;
gref->corresponding = corresponding;
gref->changed_signal = pika_resolution_entry_signals[changed_signal];
if (size)
{
gref->value = initial_val /
pika_unit_get_factor (initial_unit) *
corresponding->value *
pika_unit_get_factor (gre->unit);
gref->phy_size = initial_val /
pika_unit_get_factor (initial_unit);
}
else
{
gref->value = initial_val;
}
gref->min_value = PIKA_MIN_RESOLUTION;
gref->max_value = PIKA_MAX_RESOLUTION;
gref->adjustment = NULL;
gref->stop_recursion = 0;
gref->size = size;
if (size)
{
gref->label = g_object_new (GTK_TYPE_LABEL,
"xalign", 0.0,
"yalign", 0.5,
NULL);
pika_label_set_attributes (GTK_LABEL (gref->label),
PANGO_ATTR_STYLE, PANGO_STYLE_ITALIC,
-1);
pika_resolution_entry_format_label (gre, gref->label, gref->phy_size);
}
digits = size ? 0 : MIN (pika_unit_get_digits (initial_unit), 5) + 1;
gref->adjustment = gtk_adjustment_new (gref->value,
gref->min_value,
gref->max_value,
1.0, 10.0, 0.0);
gref->spinbutton = pika_spin_button_new (gref->adjustment,
1.0, digits);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (gref->spinbutton), TRUE);
if (spinbutton_width > 0)
{
if (spinbutton_width < 17)
gtk_entry_set_width_chars (GTK_ENTRY (gref->spinbutton),
spinbutton_width);
else
gtk_widget_set_size_request (gref->spinbutton,
spinbutton_width, -1);
}
}
/**
* pika_resolution_entry_new:
* @width_label: Optional label for the width control.
* @width: Width of the item, specified in terms of @size_unit.
* @height_label: Optional label for the height control.
* @height: Height of the item, specified in terms of @size_unit.
* @size_unit: Unit used to specify the width and height.
* @res_label: Optional label for the resolution entry.
* @initial_res: The initial resolution.
* @initial_unit: The initial unit.
*
* Creates a new #PikaResolutionEntry widget.
*
* The #PikaResolutionEntry is derived from #GtkGrid and will have
* an empty border of one cell width on each side plus an empty column left
* of the #PikaUnitMenu to allow the caller to add labels or other widgets.
*
* A #PikaChainButton is displayed if independent is set to %TRUE.
*
* Returns: A pointer to the new #PikaResolutionEntry widget.
**/
GtkWidget *
pika_resolution_entry_new (const gchar *width_label,
gdouble width,
const gchar *height_label,
gdouble height,
PikaUnit size_unit,
const gchar *res_label,
gdouble initial_res,
PikaUnit initial_unit)
{
PikaResolutionEntry *gre;
GtkTreeModel *model;
gre = g_object_new (PIKA_TYPE_RESOLUTION_ENTRY, NULL);
gre->unit = initial_unit;
pika_resolution_entry_field_init (gre, &gre->x,
&gre->width,
X_CHANGED,
initial_res, initial_unit,
FALSE, 0);
gtk_grid_attach (GTK_GRID (gre), gre->x.spinbutton, 1, 3, 1, 1);
g_signal_connect (gre->x.adjustment, "value-changed",
G_CALLBACK (pika_resolution_entry_value_callback),
&gre->x);
gtk_widget_show (gre->x.spinbutton);
gre->unitmenu = pika_unit_combo_box_new ();
model = gtk_combo_box_get_model (GTK_COMBO_BOX (gre->unitmenu));
pika_unit_store_set_has_pixels (PIKA_UNIT_STORE (model), FALSE);
pika_unit_store_set_has_percent (PIKA_UNIT_STORE (model), FALSE);
g_object_set (model,
"short-format", _("pixels/%a"),
"long-format", _("pixels/%a"),
NULL);
pika_unit_combo_box_set_active (PIKA_UNIT_COMBO_BOX (gre->unitmenu),
initial_unit);
gtk_grid_attach (GTK_GRID (gre), gre->unitmenu, 3, 3, 1, 1);
g_signal_connect (gre->unitmenu, "changed",
G_CALLBACK (pika_resolution_entry_unit_callback),
gre);
gtk_widget_show (gre->unitmenu);
pika_resolution_entry_field_init (gre, &gre->width,
&gre->x,
WIDTH_CHANGED,
width, size_unit,
TRUE, 0);
gtk_grid_attach (GTK_GRID (gre), gre->width.spinbutton, 1, 1, 1, 1);
gtk_grid_attach (GTK_GRID (gre), gre->width.label, 3, 1, 1, 1);
g_signal_connect (gre->width.adjustment, "value-changed",
G_CALLBACK (pika_resolution_entry_value_callback),
&gre->width);
gtk_widget_show (gre->width.spinbutton);
gtk_widget_show (gre->width.label);
pika_resolution_entry_field_init (gre, &gre->height, &gre->x,
HEIGHT_CHANGED,
height, size_unit,
TRUE, 0);
gtk_grid_attach (GTK_GRID (gre), gre->height.spinbutton, 1, 2, 1, 1);
gtk_grid_attach (GTK_GRID (gre), gre->height.label, 3, 2, 1, 1);
g_signal_connect (gre->height.adjustment, "value-changed",
G_CALLBACK (pika_resolution_entry_value_callback),
&gre->height);
gtk_widget_show (gre->height.spinbutton);
gtk_widget_show (gre->height.label);
if (width_label)
pika_resolution_entry_attach_label (gre, width_label, 1, 0, 0.0);
if (height_label)
pika_resolution_entry_attach_label (gre, height_label, 2, 0, 0.0);
if (res_label)
pika_resolution_entry_attach_label (gre, res_label, 3, 0, 0.0);
return GTK_WIDGET (gre);
}
/**
* pika_resolution_entry_attach_label:
* @gre: The #PikaResolutionEntry you want to add a label to.
* @text: The text of the label.
* @row: The row where the label will be attached.
* @column: The column where the label will be attached.
* @alignment: The horizontal alignment of the label.
*
* Attaches a #GtkLabel to the #PikaResolutionEntry (which is a #GtkGrid).
*
* Returns: A pointer to the new #GtkLabel widget.
**/
GtkWidget *
pika_resolution_entry_attach_label (PikaResolutionEntry *gre,
const gchar *text,
gint row,
gint column,
gfloat alignment)
{
GtkWidget *label;
g_return_val_if_fail (PIKA_IS_RESOLUTION_ENTRY (gre), NULL);
g_return_val_if_fail (text != NULL, NULL);
label = gtk_label_new_with_mnemonic (text);
if (column == 0)
{
GList *children;
GList *list;
children = gtk_container_get_children (GTK_CONTAINER (gre));
for (list = children; list; list = g_list_next (list))
{
GtkWidget *child = list->data;
gint left_attach;
gint top_attach;
gtk_container_child_get (GTK_CONTAINER (gre), child,
"left-attach", &left_attach,
"top-attach", &top_attach,
NULL);
if (left_attach == 1 && top_attach == row)
{
gtk_label_set_mnemonic_widget (GTK_LABEL (label), child);
break;
}
}
g_list_free (children);
}
gtk_label_set_xalign (GTK_LABEL (label), alignment);
gtk_grid_attach (GTK_GRID (gre), label, column, row, 1, 1);
gtk_widget_show (label);
return label;
}
/**
* pika_resolution_entry_get_x_in_dpi;
* @gre: The #PikaResolutionEntry you want to know the resolution of.
*
* Returns the X resolution of the #PikaResolutionEntry in pixels per inch.
**/
gdouble
pika_resolution_entry_get_x_in_dpi (PikaResolutionEntry *gre)
{
g_return_val_if_fail (PIKA_IS_RESOLUTION_ENTRY (gre), 0);
/* dots_in_one_unit * units_in_one_inch -> dpi */
return gre->x.value * pika_unit_get_factor (gre->unit);
}
/**
* pika_resolution_entry_get_y_in_dpi;
* @gre: The #PikaResolutionEntry you want to know the resolution of.
*
* Returns the Y resolution of the #PikaResolutionEntry in pixels per inch.
**/
gdouble
pika_resolution_entry_get_y_in_dpi (PikaResolutionEntry *gre)
{
g_return_val_if_fail (PIKA_IS_RESOLUTION_ENTRY (gre), 0);
return gre->y.value * pika_unit_get_factor (gre->unit);
}
static void
pika_resolution_entry_update_value (PikaResolutionEntryField *gref,
gdouble value)
{
if (gref->stop_recursion > 0)
return;
gref->value = value;
gref->stop_recursion++;
if (gref->size)
pika_resolution_entry_update_value (gref->corresponding,
gref->value /
gref->phy_size /
pika_unit_get_factor (gref->gre->unit));
else
{
gdouble factor = pika_unit_get_factor (gref->gre->unit);
pika_resolution_entry_update_value (&gref->gre->width,
gref->value *
gref->gre->width.phy_size *
factor);
pika_resolution_entry_update_value (&gref->gre->height,
gref->value *
gref->gre->height.phy_size *
factor);
}
gtk_adjustment_set_value (gref->adjustment, value);
gref->stop_recursion--;
g_signal_emit (gref->gre, gref->changed_signal, 0);
}
static void
pika_resolution_entry_value_callback (GtkAdjustment *adjustment,
gpointer data)
{
PikaResolutionEntryField *gref = (PikaResolutionEntryField *) data;
gdouble new_value;
new_value = gtk_adjustment_get_value (adjustment);
if (gref->value != new_value)
pika_resolution_entry_update_value (gref, new_value);
}
static void
pika_resolution_entry_update_unit (PikaResolutionEntry *gre,
PikaUnit unit)
{
PikaUnit old_unit;
gint digits;
gdouble factor;
old_unit = gre->unit;
gre->unit = unit;
digits = (pika_unit_get_digits (PIKA_UNIT_INCH) -
pika_unit_get_digits (unit));
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (gre->x.spinbutton),
MAX (3 + digits, 3));
factor = pika_unit_get_factor (old_unit) / pika_unit_get_factor (unit);
gre->x.min_value *= factor;
gre->x.max_value *= factor;
gre->x.value *= factor;
gtk_adjustment_set_value (gre->x.adjustment, gre->x.value);
pika_resolution_entry_format_label (gre,
gre->width.label, gre->width.phy_size);
pika_resolution_entry_format_label (gre,
gre->height.label, gre->height.phy_size);
g_signal_emit (gre, pika_resolution_entry_signals[UNIT_CHANGED], 0);
}
static void
pika_resolution_entry_unit_callback (GtkWidget *widget,
PikaResolutionEntry *gre)
{
PikaUnit new_unit;
new_unit = pika_unit_combo_box_get_active (PIKA_UNIT_COMBO_BOX (widget));
if (gre->unit != new_unit)
pika_resolution_entry_update_unit (gre, new_unit);
}
/**
* pika_resolution_entry_update_x_in_dpi:
* @gre: the #PikaResolutionEntry
* @data: a pointer to a gdouble
*
* Convenience function to set a double to the X resolution, suitable
* for use as a signal callback.
*/
void
pika_resolution_entry_update_x_in_dpi (PikaResolutionEntry *gre,
gpointer data)
{
gdouble *val;
g_return_if_fail (gre != NULL);
g_return_if_fail (data != NULL);
g_return_if_fail (PIKA_IS_RESOLUTION_ENTRY (gre));
val = (gdouble *) data;
*val = pika_resolution_entry_get_x_in_dpi (gre);
}
/**
* pika_resolution_entry_update_y_in_dpi:
* @gre: the #PikaResolutionEntry
* @data: a pointer to a gdouble
*
* Convenience function to set a double to the Y resolution, suitable
* for use as a signal callback.
*/
void
pika_resolution_entry_update_y_in_dpi (PikaResolutionEntry *gre,
gpointer data)
{
gdouble *val;
g_return_if_fail (gre != NULL);
g_return_if_fail (data != NULL);
g_return_if_fail (PIKA_IS_RESOLUTION_ENTRY (gre));
val = (gdouble *) data;
*val = pika_resolution_entry_get_y_in_dpi (gre);
}
static void
pika_resolution_entry_format_label (PikaResolutionEntry *gre,
GtkWidget *label,
gdouble size)
{
gchar *format = g_strdup_printf ("%%.%df %%s",
pika_unit_get_digits (gre->unit));
gchar *text = g_strdup_printf (format,
size * pika_unit_get_factor (gre->unit),
pika_unit_get_plural (gre->unit));
g_free (format);
gtk_label_set_text (GTK_LABEL (label), text);
g_free (text);
}