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gimp/plug-ins/common/file-html-table.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* GTM plug-in --- GIMP Table Magic
* Allows images to be exported as HTML tables with different colored cells.
* It doesn't have very much practical use other than being able to
* easily design a table by "painting" it in GIMP, or to make small HTML
* table images/icons.
*
* Copyright (C) 1997 Daniel Dunbar
* Email: ddunbar@diads.com
* WWW: http://millennium.diads.com/gimp/
*
* 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/>.
*/
/* Version 1.0:
* Once I first found out that it was possible to have pixel level control
* of HTML tables I instantly realized that it would be possible, however
* pointless, to save an image as a, albeit huge, HTML table.
*
* One night when I was feeling in an adventourously stupid programming mood
* I decided to write a program to do it.
*
* At first I just wrote a really ugly hack to do it, which I then planned
* on using once just to see how it worked, and then posting a URL and
* laughing about it on #gimp. As it turns out, tigert thought it actually
* had potential to be a useful plugin, so I started adding features and
* and making a nice UI.
*
* It's still not very useful, but I did manage to significantly improve my
* C programming skills in the process, so it was worth it.
*
* If you happen to find it useful I would appreciate any email about it.
* - Daniel Dunbar
* ddunbar@diads.com
*/
#include "config.h"
#include <string.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define SAVE_PROC "file-html-table-save"
#define PLUG_IN_BINARY "file-html-table"
#define PLUG_IN_ROLE "gimp-file-html-table"
/* Typedefs */
typedef struct
{
gchar captiontxt[256];
gchar cellcontent[256];
gchar clwidth[256];
gchar clheight[256];
gboolean fulldoc;
gboolean caption;
gint border;
gboolean spantags;
gboolean tdcomp;
gint cellpadding;
gint cellspacing;
} GTMValues;
typedef struct _Html Html;
typedef struct _HtmlClass HtmlClass;
struct _Html
{
GimpPlugIn parent_instance;
};
struct _HtmlClass
{
GimpPlugInClass parent_class;
};
#define HTML_TYPE (html_get_type ())
#define HTML (obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), HTML_TYPE, Html))
GType html_get_type (void) G_GNUC_CONST;
static GList * html_query_procedures (GimpPlugIn *plug_in);
static GimpProcedure * html_create_procedure (GimpPlugIn *plug_in,
const gchar *name);
static GimpValueArray * html_save (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
GimpDrawable *drawable,
GFile *file,
const GimpValueArray *args,
gpointer run_data);
static gboolean save_image (GFile *file,
GeglBuffer *buffer,
GError **error);
static gboolean save_dialog (GimpImage *image);
static gboolean print (GOutputStream *output,
GError **error,
const gchar *format,
...) G_GNUC_PRINTF (3, 0);
static gboolean color_comp (guchar *buffer,
guchar *buf2);
static void entry_changed_callback (GtkEntry *entry,
gchar *string);
G_DEFINE_TYPE (Html, html, GIMP_TYPE_PLUG_IN)
GIMP_MAIN (HTML_TYPE)
static GTMValues gtmvals =
{
"Made with GIMP Table Magic", /* caption text */
"&nbsp;", /* cellcontent text */
"", /* cell width text */
"", /* cell height text */
TRUE, /* fulldoc */
FALSE, /* caption */
2, /* border */
FALSE, /* spantags */
FALSE, /* tdcomp */
4, /* cellpadding */
0 /* cellspacing */
};
static void
html_class_init (HtmlClass *klass)
{
GimpPlugInClass *plug_in_class = GIMP_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = html_query_procedures;
plug_in_class->create_procedure = html_create_procedure;
}
static void
html_init (Html *html)
{
}
static GList *
html_query_procedures (GimpPlugIn *plug_in)
{
return g_list_append (NULL, g_strdup (SAVE_PROC));
}
static GimpProcedure *
html_create_procedure (GimpPlugIn *plug_in,
const gchar *name)
{
GimpProcedure *procedure = NULL;
if (! strcmp (name, SAVE_PROC))
{
procedure = gimp_save_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
html_save, NULL, NULL);
gimp_procedure_set_image_types (procedure, "*");
gimp_procedure_set_menu_label (procedure, N_("HTML table"));
gimp_procedure_set_documentation (procedure,
"GIMP Table Magic",
"Allows you to draw an HTML table "
"in GIMP. See help for more info.",
name);
gimp_procedure_set_attribution (procedure,
"Daniel Dunbar",
"Daniel Dunbar",
"1998");
gimp_file_procedure_set_handles_remote (GIMP_FILE_PROCEDURE (procedure),
TRUE);
gimp_file_procedure_set_mime_types (GIMP_FILE_PROCEDURE (procedure),
"text/html");
gimp_file_procedure_set_extensions (GIMP_FILE_PROCEDURE (procedure),
"html,htm");
}
return procedure;
}
static GimpValueArray *
html_save (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
GimpDrawable *drawable,
GFile *file,
const GimpValueArray *args,
gpointer run_data)
{
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GeglBuffer *buffer;
GError *error = NULL;
INIT_I18N ();
gegl_init (NULL, NULL);
gimp_get_data (SAVE_PROC, &gtmvals);
if (! save_dialog (image))
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_CANCEL,
NULL);
buffer = gimp_drawable_get_buffer (drawable);
if (save_image (file, buffer,
&error))
{
gimp_set_data (SAVE_PROC, &gtmvals, sizeof (GTMValues));
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
g_object_unref (buffer);
return gimp_procedure_new_return_values (procedure, status, error);
}
static gboolean
save_image (GFile *file,
GeglBuffer *buffer,
GError **error)
{
const Babl *format = babl_format ("R'G'B'A u8");
GeglSampler *sampler;
GCancellable *cancellable;
GOutputStream *output;
gint row, col;
gint cols, rows;
gint x, y;
gint colcount, colspan, rowspan;
gint *palloc;
guchar *buf, *buf2;
gchar *width = NULL;
gchar *height = NULL;
cols = gegl_buffer_get_width (buffer);
rows = gegl_buffer_get_height (buffer);
gimp_progress_init_printf (_("Exporting '%s'"),
gimp_file_get_utf8_name (file));
output = G_OUTPUT_STREAM (g_file_replace (file,
NULL, FALSE, G_FILE_CREATE_NONE,
NULL, error));
if (output)
{
GOutputStream *buffered;
buffered = g_buffered_output_stream_new (output);
g_object_unref (output);
output = buffered;
}
else
{
return FALSE;
}
sampler = gegl_buffer_sampler_new (buffer, format, GEGL_SAMPLER_NEAREST);
palloc = g_new (int, rows * cols);
if (gtmvals.fulldoc)
{
if (! print (output, error,
"<HTML>\n<HEAD><TITLE>%s</TITLE></HEAD>\n<BODY>\n",
gimp_file_get_utf8_name (file)) ||
! print (output, error, "<H1>%s</H1>\n",
gimp_file_get_utf8_name (file)))
{
goto fail;
}
}
if (! print (output, error,
"<TABLE BORDER=%d CELLPADDING=%d CELLSPACING=%d>\n",
gtmvals.border, gtmvals.cellpadding, gtmvals.cellspacing))
goto fail;
if (gtmvals.caption)
{
if (! print (output, error, "<CAPTION>%s</CAPTION>\n",
gtmvals.captiontxt))
goto fail;
}
buf = g_newa (guchar, babl_format_get_bytes_per_pixel (format));
buf2 = g_newa (guchar, babl_format_get_bytes_per_pixel (format));
if (strcmp (gtmvals.clwidth, "") != 0)
{
width = g_strdup_printf (" WIDTH=\"%s\"", gtmvals.clwidth);
}
if (strcmp (gtmvals.clheight, "") != 0)
{
height = g_strdup_printf (" HEIGHT=\"%s\" ", gtmvals.clheight);
}
if (! width)
width = g_strdup (" ");
if (! height)
height = g_strdup (" ");
/* Initialize array to hold ROWSPAN and COLSPAN cell allocation table */
for (row = 0; row < rows; row++)
for (col = 0; col < cols; col++)
palloc[cols * row + col] = 1;
colspan = 0;
rowspan = 0;
for (y = 0; y < rows; y++)
{
if (! print (output, error, " <TR>\n"))
goto fail;
for (x = 0; x < cols; x++)
{
gegl_sampler_get (sampler, x, y, NULL, buf, GEGL_ABYSS_NONE);
/* Determine ROWSPAN and COLSPAN */
if (gtmvals.spantags)
{
col = x;
row = y;
colcount = 0;
colspan = 0;
rowspan = 0;
gegl_sampler_get (sampler, col, row, NULL, buf2, GEGL_ABYSS_NONE);
while (color_comp (buf, buf2) &&
palloc[cols * row + col] == 1 &&
row < rows)
{
while (color_comp (buf, buf2) &&
palloc[cols * row + col] == 1 &&
col < cols)
{
colcount++;
col++;
gegl_sampler_get (sampler,
col, row, NULL, buf2, GEGL_ABYSS_NONE);
}
if (colcount != 0)
{
row++;
rowspan++;
}
if (colcount < colspan || colspan == 0)
colspan = colcount;
col = x;
colcount = 0;
gegl_sampler_get (sampler,
col, row, NULL, buf2, GEGL_ABYSS_NONE);
}
if (colspan > 1 || rowspan > 1)
{
for (row = 0; row < rowspan; row++)
for (col = 0; col < colspan; col++)
palloc[cols * (row + y) + (col + x)] = 0;
palloc[cols * y + x] = 2;
}
}
if (palloc[cols * y + x] == 1)
{
if (! print (output, error,
" <TD%s%sBGCOLOR=#%02x%02x%02x>",
width, height, buf[0], buf[1], buf[2]))
goto fail;
}
if (palloc[cols * y + x] == 2)
{
if (! print (output, error,
" <TD ROWSPAN=\"%d\" COLSPAN=\"%d\"%s%sBGCOLOR=#%02x%02x%02x>",
rowspan, colspan, width, height,
buf[0], buf[1], buf[2]))
goto fail;
}
if (palloc[cols * y + x] != 0)
{
if (gtmvals.tdcomp)
{
if (! print (output, error,
"%s</TD>\n", gtmvals.cellcontent))
goto fail;
}
else
{
if (! print (output, error,
"\n %s\n </TD>\n", gtmvals.cellcontent))
goto fail;
}
}
}
if (! print (output, error, " </TR>\n"))
goto fail;
gimp_progress_update ((double) y / (double) rows);
}
if (gtmvals.fulldoc)
{
if (! print (output, error, "</TABLE></BODY></HTML>\n"))
goto fail;
}
else
{
if (! print (output, error, "</TABLE>\n"))
goto fail;
}
if (! g_output_stream_close (output, NULL, error))
goto fail;
g_object_unref (output);
g_object_unref (sampler);
g_free (width);
g_free (height);
g_free (palloc);
gimp_progress_update (1.0);
return TRUE;
fail:
cancellable = g_cancellable_new ();
g_cancellable_cancel (cancellable);
g_output_stream_close (output, cancellable, NULL);
g_object_unref (cancellable);
g_object_unref (output);
g_object_unref (sampler);
g_free (width);
g_free (height);
g_free (palloc);
return FALSE;
}
static gint
save_dialog (GimpImage *image)
{
GtkWidget *dialog;
GtkWidget *main_vbox;
GtkWidget *frame;
GtkWidget *vbox;
GtkWidget *grid;
GtkWidget *spinbutton;
GtkAdjustment *adj;
GtkWidget *entry;
GtkWidget *toggle;
gboolean run;
gimp_ui_init (PLUG_IN_BINARY);
dialog = gimp_export_dialog_new (_("HTML table"), PLUG_IN_BINARY, SAVE_PROC);
main_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
gtk_box_pack_start (GTK_BOX (gimp_export_dialog_get_content_area (dialog)),
main_vbox, TRUE, TRUE, 0);
if (gimp_image_width (image) * gimp_image_height (image) > 4096)
{
GtkWidget *eek;
GtkWidget *label;
GtkWidget *hbox;
frame = gimp_frame_new (_("Warning"));
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
gtk_container_add (GTK_CONTAINER (frame), hbox);
eek = gtk_image_new_from_icon_name (GIMP_ICON_WILBER_EEK,
GTK_ICON_SIZE_DIALOG);
gtk_box_pack_start (GTK_BOX (hbox), eek, FALSE, FALSE, 0);
label = gtk_label_new (_("You are about to create a huge\n"
"HTML file which will most likely\n"
"crash your browser."));
gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 0);
gtk_widget_show_all (frame);
}
/* HTML Page Options */
frame = gimp_frame_new (_("HTML Page Options"));
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
gtk_container_add (GTK_CONTAINER (frame), vbox);
gtk_widget_show (vbox);
toggle = gtk_check_button_new_with_mnemonic (_("_Generate full HTML document"));
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), gtmvals.fulldoc);
gtk_widget_show (toggle);
gimp_help_set_help_data (toggle,
_("If checked GTM will output a full HTML document "
"with <HTML>, <BODY>, etc. tags instead of just "
"the table html."),
NULL);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&gtmvals.fulldoc);
gtk_widget_show (main_vbox);
gtk_widget_show (frame);
/* HTML Table Creation Options */
frame = gimp_frame_new (_("Table Creation Options"));
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
grid = gtk_grid_new ();
gtk_grid_set_row_spacing (GTK_GRID (grid), 6);
gtk_grid_set_column_spacing (GTK_GRID (grid), 6);
gtk_container_add (GTK_CONTAINER (frame), grid);
toggle = gtk_check_button_new_with_mnemonic (_("_Use cellspan"));
gtk_grid_attach (GTK_GRID (grid), toggle, 0, 0, 2, 1);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), gtmvals.spantags);
gtk_widget_show (toggle);
gimp_help_set_help_data (toggle,
_("If checked GTM will replace any rectangular "
"sections of identically colored blocks with one "
"large cell with ROWSPAN and COLSPAN values."),
NULL);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&gtmvals.spantags);
toggle = gtk_check_button_new_with_mnemonic (_("Co_mpress TD tags"));
gtk_grid_attach (GTK_GRID (grid), toggle, 0, 1, 2, 1);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), gtmvals.tdcomp);
gtk_widget_show (toggle);
gimp_help_set_help_data (toggle,
_("Checking this tag will cause GTM to leave no "
"whitespace between the TD tags and the "
"cellcontent. This is only necessary for pixel "
"level positioning control."),
NULL);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&gtmvals.tdcomp);
toggle = gtk_check_button_new_with_mnemonic (_("C_aption"));
gtk_grid_attach (GTK_GRID (grid), toggle, 0, 2, 1, 1);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), gtmvals.caption);
gtk_widget_show (toggle);
gimp_help_set_help_data (toggle,
_("Check if you would like to have the table "
"captioned."),
NULL);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&gtmvals.caption);
entry = gtk_entry_new ();
gtk_widget_set_size_request (entry, 200, -1);
gtk_entry_set_text (GTK_ENTRY (entry), gtmvals.captiontxt);
gtk_grid_attach (GTK_GRID (grid), entry, 1, 2, 1, 1);
gtk_widget_show (entry);
gimp_help_set_help_data (entry, _("The text for the table caption."), NULL);
g_signal_connect (entry, "changed",
G_CALLBACK (entry_changed_callback),
gtmvals.captiontxt);
g_object_bind_property (toggle, "active",
entry, "sensitive",
G_BINDING_SYNC_CREATE);
entry = gtk_entry_new ();
gtk_widget_set_size_request (entry, 200, -1);
gtk_entry_set_text (GTK_ENTRY (entry), gtmvals.cellcontent);
gimp_grid_attach_aligned (GTK_GRID (grid), 0, 3,
_("C_ell content:"), 0.0, 0.5,
entry, 1);
gtk_widget_show (entry);
gimp_help_set_help_data (entry, _("The text to go into each cell."), NULL);
g_signal_connect (entry, "changed",
G_CALLBACK (entry_changed_callback),
gtmvals.cellcontent);
gtk_widget_show (grid);
gtk_widget_show (frame);
/* HTML Table Options */
frame = gimp_frame_new (_("Table Options"));
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
grid = gtk_grid_new ();
gtk_grid_set_row_spacing (GTK_GRID (grid), 6);
gtk_grid_set_column_spacing (GTK_GRID (grid), 6);
gtk_container_add (GTK_CONTAINER (frame), grid);
adj = gtk_adjustment_new (gtmvals.border, 0, 1000, 1, 10, 0);
spinbutton = gimp_spin_button_new (adj, 1.0, 0);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spinbutton), TRUE);
gimp_grid_attach_aligned (GTK_GRID (grid), 0, 0,
_("_Border:"), 0.0, 0.5,
spinbutton, 1);
gimp_help_set_help_data (spinbutton,
_("The number of pixels in the table border."),
NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_int_adjustment_update),
&gtmvals.border);
entry = gtk_entry_new ();
gtk_widget_set_size_request (entry, 60, -1);
gtk_entry_set_text (GTK_ENTRY (entry), gtmvals.clwidth);
gimp_grid_attach_aligned (GTK_GRID (grid), 0, 1,
_("_Width:"), 0.0, 0.5,
entry, 1);
gimp_help_set_help_data (entry,
_("The width for each table cell. "
"Can be a number or a percent."),
NULL);
g_signal_connect (entry, "changed",
G_CALLBACK (entry_changed_callback),
gtmvals.clwidth);
entry = gtk_entry_new ();
gtk_widget_set_size_request (entry, 60, -1);
gtk_entry_set_text (GTK_ENTRY (entry), gtmvals.clheight);
gimp_grid_attach_aligned (GTK_GRID (grid), 0, 2,
_("_Height:"), 0.0, 0.5,
entry, 1);
gimp_help_set_help_data (entry,
_("The height for each table cell. "
"Can be a number or a percent."),
NULL);
g_signal_connect (entry, "changed",
G_CALLBACK (entry_changed_callback),
gtmvals.clheight);
adj = gtk_adjustment_new (gtmvals.cellpadding, 0, 1000, 1, 10, 0);
spinbutton = gimp_spin_button_new (adj, 1.0, 0);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spinbutton), TRUE);
gimp_grid_attach_aligned (GTK_GRID (grid), 0, 3,
_("Cell-_padding:"), 0.0, 0.5,
spinbutton, 1);
gimp_help_set_help_data (spinbutton,
_("The amount of cell padding."), NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_int_adjustment_update),
&gtmvals.cellpadding);
adj = gtk_adjustment_new (gtmvals.cellspacing, 0, 1000, 1, 10, 0);
spinbutton = gimp_spin_button_new (adj, 1.0, 0);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spinbutton), TRUE);
gimp_grid_attach_aligned (GTK_GRID (grid), 0, 4,
_("Cell-_spacing:"), 0.0, 0.5,
spinbutton, 1);
gimp_help_set_help_data (spinbutton,
_("The amount of cell spacing."), NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_int_adjustment_update),
&gtmvals.cellspacing);
gtk_widget_show (grid);
gtk_widget_show (frame);
gtk_widget_show (dialog);
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dialog);
return run;
}
static gboolean
print (GOutputStream *output,
GError **error,
const gchar *format,
...)
{
va_list args;
gboolean success;
va_start (args, format);
success = g_output_stream_vprintf (output, NULL, NULL,
error, format, args);
va_end (args);
return success;
}
static gboolean
color_comp (guchar *buf,
guchar *buf2)
{
return (buf[0] == buf2[0] &&
buf[1] == buf2[1] &&
buf[2] == buf2[2]);
}
/* Export interface functions */
static void
entry_changed_callback (GtkEntry *entry,
gchar *string)
{
g_strlcpy (string, gtk_entry_get_text (entry), 256);
}
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