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gimp/plug-ins/common/web-page.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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/>.
*/
/* Webpage plug-in.
* Copyright (C) 2011 Mukund Sivaraman <muks@banu.com>.
* Portions are copyright of the author of the
* file-open-location-dialog.c code.
*/
#include "config.h"
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include <webkit2/webkit2.h>
#include "libgimp/stdplugins-intl.h"
#define PLUG_IN_PROC "plug-in-web-page"
#define PLUG_IN_BINARY "web-page"
#define PLUG_IN_ROLE "gimp-web-page"
#define MAX_URL_LEN 2048
typedef struct
{
char *url;
gint32 width;
gint font_size;
GimpImage *image;
GError *error;
} WebpageVals;
typedef struct
{
char url[MAX_URL_LEN];
gint32 width;
gint font_size;
} WebpageSaveVals;
typedef struct _Webpage Webpage;
typedef struct _WebpageClass WebpageClass;
struct _Webpage
{
GimpPlugIn parent_instance;
};
struct _WebpageClass
{
GimpPlugInClass parent_class;
};
#define WEBPAGE_TYPE (webpage_get_type ())
#define WEBPAGE (obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), WEBPAGE_TYPE, Webpage))
GType webpage_get_type (void) G_GNUC_CONST;
static GList * webpage_query_procedures (GimpPlugIn *plug_in);
static GimpProcedure * webpage_create_procedure (GimpPlugIn *plug_in,
const gchar *name);
static GimpValueArray * webpage_run (GimpProcedure *procedure,
const GimpValueArray *args,
gpointer run_data);
static gboolean webpage_dialog (void);
static GimpImage * webpage_capture (void);
G_DEFINE_TYPE (Webpage, webpage, GIMP_TYPE_PLUG_IN)
GIMP_MAIN (WEBPAGE_TYPE)
static WebpageVals webpagevals;
static void
webpage_class_init (WebpageClass *klass)
{
GimpPlugInClass *plug_in_class = GIMP_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = webpage_query_procedures;
plug_in_class->create_procedure = webpage_create_procedure;
}
static void
webpage_init (Webpage *webpage)
{
}
static GList *
webpage_query_procedures (GimpPlugIn *plug_in)
{
return g_list_append (NULL, g_strdup (PLUG_IN_PROC));
}
static GimpProcedure *
webpage_create_procedure (GimpPlugIn *plug_in,
const gchar *name)
{
GimpProcedure *procedure = NULL;
if (! strcmp (name, PLUG_IN_PROC))
{
procedure = gimp_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
webpage_run, NULL, NULL);
gimp_procedure_set_menu_label (procedure, N_("From _Webpage..."));
gimp_procedure_add_menu_path (procedure, "<Image>/File/Create/Acquire");
gimp_procedure_set_documentation (procedure,
N_("Create an image of a webpage"),
"The plug-in allows you to take a "
"screenshot of a webpage.",
name);
gimp_procedure_set_attribution (procedure,
"Mukund Sivaraman <muks@banu.com>",
"2011",
"2011");
GIMP_PROC_ARG_ENUM (procedure, "run-mode",
"Run mode",
"The run mode",
GIMP_TYPE_RUN_MODE,
GIMP_RUN_INTERACTIVE,
G_PARAM_READWRITE);
GIMP_PROC_ARG_STRING (procedure, "url",
"URL",
"URL of the webpage to screenshot",
"http://www.gimp.org/",
G_PARAM_READWRITE);
GIMP_PROC_ARG_INT (procedure, "width",
"Width",
"The width of the screenshot (in pixels)",
100, GIMP_MAX_IMAGE_SIZE, 1024,
G_PARAM_READWRITE);
GIMP_PROC_ARG_INT (procedure, "font-size",
"Font size",
"The font size to use in the page (in pt)",
1, 1000, 12,
G_PARAM_READWRITE);
GIMP_PROC_VAL_IMAGE (procedure, "image",
"Image",
"The output image",
FALSE,
G_PARAM_READWRITE);
}
return procedure;
}
static GimpValueArray *
webpage_run (GimpProcedure *procedure,
const GimpValueArray *args,
gpointer run_data)
{
GimpValueArray *return_vals;
GimpRunMode run_mode;
GimpImage *image;
WebpageSaveVals save = { "https://www.gimp.org/", 1024, 12 };
INIT_I18N ();
gimp_get_data (PLUG_IN_PROC, &save);
run_mode = GIMP_VALUES_GET_ENUM (args, 0);
webpagevals.url = g_strdup (save.url);
webpagevals.width = save.width;
webpagevals.font_size = save.font_size;
/* how are we running today? */
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
if (! webpage_dialog ())
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_CANCEL,
NULL);
break;
case GIMP_RUN_WITH_LAST_VALS:
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_CALLING_ERROR,
NULL);
break;
case GIMP_RUN_NONINTERACTIVE:
webpagevals.url = (gchar *) GIMP_VALUES_GET_STRING (args, 1);
webpagevals.width = GIMP_VALUES_GET_INT (args, 2);
webpagevals.font_size = GIMP_VALUES_GET_INT (args, 3);
break;
default:
break;
}
image = webpage_capture ();
if (! image)
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_EXECUTION_ERROR,
webpagevals.error);
save.width = webpagevals.width;
save.font_size = webpagevals.font_size;
if (strlen (webpagevals.url) < MAX_URL_LEN)
{
g_strlcpy (save.url, webpagevals.url, MAX_URL_LEN);
}
else
{
memset (save.url, 0, MAX_URL_LEN);
}
gimp_set_data (PLUG_IN_PROC, &save, sizeof save);
if (run_mode == GIMP_RUN_INTERACTIVE)
gimp_display_new (image);
return_vals = gimp_procedure_new_return_values (procedure,
GIMP_PDB_SUCCESS,
NULL);
GIMP_VALUES_SET_IMAGE (return_vals, 1, image);
return return_vals;
}
static gboolean
webpage_dialog (void)
{
GtkWidget *dialog;
GtkWidget *hbox;
GtkWidget *vbox;
GtkWidget *image;
GtkWidget *label;
GtkWidget *entry;
GtkSizeGroup *sizegroup;
GtkAdjustment *adjustment;
GtkWidget *spinbutton;
GtkWidget *combo;
gint active;
gint status;
gboolean ret = FALSE;
gimp_ui_init (PLUG_IN_BINARY);
dialog = gimp_dialog_new (_("Create from webpage"), PLUG_IN_ROLE,
NULL, 0,
gimp_standard_help_func, PLUG_IN_PROC,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("Cre_ate"), GTK_RESPONSE_OK,
NULL);
gimp_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gimp_window_set_transient (GTK_WINDOW (dialog));
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
gtk_container_set_border_width (GTK_CONTAINER (hbox), 12);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_box_pack_start (GTK_BOX (hbox), vbox, FALSE, FALSE, 0);
gtk_widget_show (vbox);
image = gtk_image_new_from_icon_name (GIMP_ICON_WEB,
GTK_ICON_SIZE_BUTTON);
gtk_box_pack_start (GTK_BOX (vbox), image, FALSE, FALSE, 0);
gtk_widget_show (image);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
gtk_box_pack_start (GTK_BOX (hbox), vbox, TRUE, TRUE, 0);
gtk_widget_show (vbox);
label = gtk_label_new (_("Enter location (URI):"));
gtk_label_set_xalign (GTK_LABEL (label), 0.0);
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
entry = gtk_entry_new ();
gtk_entry_set_activates_default (GTK_ENTRY (entry), TRUE);
gtk_widget_set_size_request (entry, 400, -1);
gtk_box_pack_start (GTK_BOX (vbox), entry, FALSE, FALSE, 0);
if (webpagevals.url)
gtk_entry_set_text (GTK_ENTRY (entry),
webpagevals.url);
gtk_widget_show (entry);
sizegroup = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);
/* Width */
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_box_pack_start (GTK_BOX (vbox),
hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
label = gtk_label_new (_("Width (pixels):"));
gtk_size_group_add_widget (sizegroup, label);
gtk_label_set_xalign (GTK_LABEL (label), 0.0);
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
adjustment = gtk_adjustment_new (webpagevals.width,
1, 8192, 1, 10, 0);
spinbutton = gimp_spin_button_new (adjustment, 1.0, 0);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spinbutton), TRUE);
gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
/* Font size */
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_box_pack_start (GTK_BOX (vbox),
hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
label = gtk_label_new (_("Font size:"));
gtk_size_group_add_widget (sizegroup, label);
gtk_label_set_xalign (GTK_LABEL (label), 0.0);
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
combo = gimp_int_combo_box_new (_("Huge"), 16,
_("Large"), 14,
C_("web-page", "Default"), 12,
_("Small"), 10,
_("Tiny"), 8,
NULL);
switch (webpagevals.font_size)
{
case 16:
case 14:
case 12:
case 10:
case 8:
active = webpagevals.font_size;
break;
default:
active = 12;
}
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (combo), active);
gtk_box_pack_start (GTK_BOX (hbox), combo, FALSE, FALSE, 0);
gtk_widget_show (combo);
g_object_unref (sizegroup);
status = gimp_dialog_run (GIMP_DIALOG (dialog));
if (status == GTK_RESPONSE_OK)
{
g_free (webpagevals.url);
webpagevals.url = g_strdup (gtk_entry_get_text (GTK_ENTRY (entry)));
webpagevals.width = (gint) gtk_adjustment_get_value (adjustment);
gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (combo),
&webpagevals.font_size);
ret = TRUE;
}
gtk_widget_destroy (dialog);
return ret;
}
static void
notify_progress_cb (WebKitWebView *view,
GParamSpec *pspec,
gpointer user_data)
{
static gdouble old_progress = 0.0;
gdouble progress = webkit_web_view_get_estimated_load_progress (view);
if ((progress - old_progress) > 0.01)
{
gimp_progress_update (progress);
old_progress = progress;
}
}
static gboolean
load_failed_cb (WebKitWebView *view,
WebKitLoadEvent event,
gchar *uri,
gpointer web_error,
gpointer user_data)
{
webpagevals.error = g_error_copy ((GError *) web_error);
gtk_main_quit ();
return TRUE;
}
static void
snapshot_ready (GObject *source_object,
GAsyncResult *result,
gpointer user_data)
{
WebKitWebView *view = WEBKIT_WEB_VIEW (source_object);
cairo_surface_t *surface;
surface = webkit_web_view_get_snapshot_finish (view, result,
&webpagevals.error);
if (surface)
{
gint width;
gint height;
GimpLayer *layer;
width = cairo_image_surface_get_width (surface);
height = cairo_image_surface_get_height (surface);
webpagevals.image = gimp_image_new (width, height, GIMP_RGB);
gimp_image_undo_disable (webpagevals.image);
layer = gimp_layer_new_from_surface (webpagevals.image, _("Webpage"),
surface,
0.25, 1.0);
gimp_image_insert_layer (webpagevals.image, layer, NULL, 0);
gimp_image_undo_enable (webpagevals.image);
cairo_surface_destroy (surface);
}
gimp_progress_update (1.0);
gtk_main_quit ();
}
static gboolean
load_finished_idle (gpointer data)
{
static gint count = 0;
gimp_progress_update ((gdouble) count * 0.025);
count++;
if (count < 10)
return G_SOURCE_CONTINUE;
webkit_web_view_get_snapshot (WEBKIT_WEB_VIEW (data),
WEBKIT_SNAPSHOT_REGION_FULL_DOCUMENT,
WEBKIT_SNAPSHOT_OPTIONS_NONE,
NULL,
snapshot_ready,
NULL);
count = 0;
return G_SOURCE_REMOVE;
}
static void
load_changed_cb (WebKitWebView *view,
WebKitLoadEvent event,
gpointer user_data)
{
if (event == WEBKIT_LOAD_FINISHED)
{
if (! webpagevals.error)
{
gimp_progress_init_printf (_("Transferring webpage image for '%s'"),
webpagevals.url);
g_timeout_add (100, load_finished_idle, view);
return;
}
gtk_main_quit ();
}
}
static GimpImage *
webpage_capture (void)
{
gchar *scheme;
GtkWidget *window;
GtkWidget *view;
WebKitSettings *settings;
char *ua;
if (! webpagevals.url || strlen (webpagevals.url) == 0)
{
g_set_error (&webpagevals.error, 0, 0, _("No URL was specified"));
return NULL;
}
scheme = g_uri_parse_scheme (webpagevals.url);
if (! scheme)
{
char *url;
/* If we were not given a well-formed URL, make one. */
url = g_strconcat ("http://", webpagevals.url, NULL);
g_free (webpagevals.url);
webpagevals.url = url;
g_free (scheme);
}
if (webpagevals.width < 32)
{
g_warning ("Width '%d' is too small. Clamped to 32.",
webpagevals.width);
webpagevals.width = 32;
}
else if (webpagevals.width > 8192)
{
g_warning ("Width '%d' is too large. Clamped to 8192.",
webpagevals.width);
webpagevals.width = 8192;
}
window = gtk_offscreen_window_new ();
gtk_widget_show (window);
view = webkit_web_view_new ();
gtk_widget_show (view);
gtk_widget_set_vexpand (view, TRUE);
gtk_widget_set_size_request (view, webpagevals.width, -1);
gtk_container_add (GTK_CONTAINER (window), view);
/* Append "GIMP/<GIMP_VERSION>" to the user agent string */
settings = webkit_web_view_get_settings (WEBKIT_WEB_VIEW (view));
ua = g_strdup_printf ("%s GIMP/%s",
webkit_settings_get_user_agent (settings),
GIMP_VERSION);
webkit_settings_set_user_agent (settings, ua);
g_free (ua);
/* Set font size */
webkit_settings_set_default_font_size (settings, webpagevals.font_size);
g_signal_connect (view, "notify::estimated-load-progress",
G_CALLBACK (notify_progress_cb),
window);
g_signal_connect (view, "load-failed",
G_CALLBACK (load_failed_cb),
window);
g_signal_connect (view, "load-changed",
G_CALLBACK (load_changed_cb),
window);
gimp_progress_init_printf (_("Downloading webpage '%s'"), webpagevals.url);
webkit_web_view_load_uri (WEBKIT_WEB_VIEW (view),
webpagevals.url);
gtk_main ();
gtk_widget_destroy (window);
gimp_progress_update (1.0);
return webpagevals.image;
}
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