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

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/* 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):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* GTM plug-in --- PIKA 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 PIKA, or to make small HTML
* table images/icons.
*
* Copyright (C) 1997 Daniel Dunbar
* Email: ddunbar@diads.com
* WWW: http://millennium.diads.com/pika/
*
* 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 #pika. 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 <libpika/pika.h>
#include <libpika/pikaui.h>
#include "libpika/stdplugins-intl.h"
#define SAVE_PROC "file-html-table-save"
#define PLUG_IN_BINARY "file-html-table"
typedef struct _Html Html;
typedef struct _HtmlClass HtmlClass;
struct _Html
{
PikaPlugIn parent_instance;
};
struct _HtmlClass
{
PikaPlugInClass 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 (PikaPlugIn *plug_in);
static PikaProcedure * html_create_procedure (PikaPlugIn *plug_in,
const gchar *name);
static PikaValueArray * html_save (PikaProcedure *procedure,
PikaRunMode run_mode,
PikaImage *image,
gint n_drawables,
PikaDrawable **drawables,
GFile *file,
const PikaValueArray *args,
gpointer run_data);
static gboolean save_image (GFile *file,
GeglBuffer *buffer,
GObject *config,
GError **error);
static gboolean save_dialog (PikaImage *image,
PikaProcedure *procedure,
GObject *config);
static gboolean print (GOutputStream *output,
GError **error,
const gchar *format,
...) G_GNUC_PRINTF (3, 0);
static gboolean color_comp (guchar *buffer,
guchar *buf2);
G_DEFINE_TYPE (Html, html, PIKA_TYPE_PLUG_IN)
PIKA_MAIN (HTML_TYPE)
DEFINE_STD_SET_I18N
static void
html_class_init (HtmlClass *klass)
{
PikaPlugInClass *plug_in_class = PIKA_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = html_query_procedures;
plug_in_class->create_procedure = html_create_procedure;
plug_in_class->set_i18n = STD_SET_I18N;
}
static void
html_init (Html *html)
{
}
static GList *
html_query_procedures (PikaPlugIn *plug_in)
{
return g_list_append (NULL, g_strdup (SAVE_PROC));
}
static PikaProcedure *
html_create_procedure (PikaPlugIn *plug_in,
const gchar *name)
{
PikaProcedure *procedure = NULL;
if (! strcmp (name, SAVE_PROC))
{
procedure = pika_save_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
html_save, NULL, NULL);
pika_procedure_set_image_types (procedure, "*");
pika_procedure_set_menu_label (procedure, _("HTML table"));
pika_file_procedure_set_format_name (PIKA_FILE_PROCEDURE (procedure),
_("HTML Table"));
pika_procedure_set_documentation (procedure,
_("PIKA Table Magic"),
_("Allows you to draw an HTML table "
"in PIKA. See help for more info."),
name);
pika_procedure_set_attribution (procedure,
"Daniel Dunbar",
"Daniel Dunbar",
"1998");
pika_file_procedure_set_handles_remote (PIKA_FILE_PROCEDURE (procedure),
TRUE);
pika_file_procedure_set_mime_types (PIKA_FILE_PROCEDURE (procedure),
"text/html");
pika_file_procedure_set_extensions (PIKA_FILE_PROCEDURE (procedure),
"html,htm");
PIKA_PROC_AUX_ARG_BOOLEAN (procedure, "use-caption",
_("Use c_aption"),
_("Enable if you would like to have the table "
"captioned."),
FALSE,
PIKA_PARAM_READWRITE);
PIKA_PROC_AUX_ARG_STRING (procedure, "caption-text",
_("Capt_ion"),
_("The text for the table caption."),
"Made with PIKA Table Magic",
PIKA_PARAM_READWRITE);
PIKA_PROC_AUX_ARG_STRING (procedure, "cell-content",
_("Cell con_tent"),
_("The text to go into each cell."),
"&nbsp;",
PIKA_PARAM_READWRITE);
PIKA_PROC_AUX_ARG_STRING (procedure, "cell-width",
_("_Width"),
_("The width for each table cell. "
"Can be a number or a percent."),
"",
PIKA_PARAM_READWRITE);
PIKA_PROC_AUX_ARG_STRING (procedure, "cell-height",
_("_Height"),
_("The height for each table cell. "
"Can be a number or a percent."),
"",
PIKA_PARAM_READWRITE);
PIKA_PROC_AUX_ARG_BOOLEAN (procedure, "full-document",
_("_Generate full HTML document"),
_("If enabled GTM will output a full HTML "
"document with <HTML>, <BODY>, etc. tags "
"instead of just the table html."),
TRUE,
PIKA_PARAM_READWRITE);
PIKA_PROC_AUX_ARG_INT (procedure, "border",
_("_Border"),
_("The number of pixels in the table border."),
0, 1000, 2,
PIKA_PARAM_READWRITE);
PIKA_PROC_AUX_ARG_BOOLEAN (procedure, "span-tags",
_("_Use cellspan"),
_("If enabled GTM will replace any "
"rectangular sections of identically "
"colored blocks with one large cell with "
"ROWSPAN and COLSPAN values."),
FALSE,
PIKA_PARAM_READWRITE);
PIKA_PROC_AUX_ARG_BOOLEAN (procedure, "compress-td-tags",
_("Co_mpress TD tags"),
_("Enabling this will cause GTM to "
"leave no whitespace between the TD "
"tags and the cell content. This is only "
"necessary for pixel level positioning "
"control."),
FALSE,
PIKA_PARAM_READWRITE);
PIKA_PROC_AUX_ARG_INT (procedure, "cell-padding",
_("Cell-pa_dding"),
_("The amount of cell padding."),
0, 1000, 4,
PIKA_PARAM_READWRITE);
PIKA_PROC_AUX_ARG_INT (procedure, "cell-spacing",
_("Cell spaci_ng"),
_("The amount of cell spacing."),
0, 1000, 0,
PIKA_PARAM_READWRITE);
}
return procedure;
}
static PikaValueArray *
html_save (PikaProcedure *procedure,
PikaRunMode run_mode,
PikaImage *image,
gint n_drawables,
PikaDrawable **drawables,
GFile *file,
const PikaValueArray *args,
gpointer run_data)
{
PikaProcedureConfig *config;
PikaPDBStatusType status = PIKA_PDB_SUCCESS;
GeglBuffer *buffer;
GError *error = NULL;
gegl_init (NULL, NULL);
if (run_mode != PIKA_RUN_INTERACTIVE)
return pika_procedure_new_return_values (procedure,
PIKA_PDB_CALLING_ERROR,
NULL);
config = pika_procedure_create_config (procedure);
pika_procedure_config_begin_run (config, image, run_mode, args);
if (! save_dialog (image, procedure, G_OBJECT (config)))
return pika_procedure_new_return_values (procedure,
PIKA_PDB_CANCEL,
NULL);
if (n_drawables != 1)
{
g_set_error (&error, G_FILE_ERROR, 0,
_("HTML table plug-in does not support multiple layers."));
return pika_procedure_new_return_values (procedure,
PIKA_PDB_CALLING_ERROR,
error);
}
buffer = pika_drawable_get_buffer (drawables[0]);
if (! save_image (file, buffer, G_OBJECT (config),
&error))
{
status = PIKA_PDB_EXECUTION_ERROR;
}
g_object_unref (buffer);
pika_procedure_config_end_run (config, status);
g_object_unref (config);
return pika_procedure_new_return_values (procedure, status, error);
}
static gboolean
save_image (GFile *file,
GeglBuffer *buffer,
GObject *config,
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;
gboolean config_use_caption;
gchar *config_caption_text;
gchar *config_cell_content;
gchar *config_cell_width;
gchar *config_cell_height;
gboolean config_full_document;
gint config_border;
gboolean config_span_tags;
gboolean config_compress_td_tags;
gint config_cell_padding;
gint config_cell_spacing;
g_object_get (config,
"use-caption", &config_use_caption,
"caption-text", &config_caption_text,
"cell-content", &config_cell_content,
"cell-width", &config_cell_width,
"cell-height", &config_cell_height,
"full-document", &config_full_document,
"border", &config_border,
"span-tags", &config_span_tags,
"compress-td-tags", &config_compress_td_tags,
"cell-padding", &config_cell_padding,
"cell-spacing", &config_cell_spacing,
NULL);
if (! config_caption_text) config_caption_text = g_strdup ("");
if (! config_cell_content) config_cell_content = g_strdup ("");
if (! config_cell_width) config_cell_width = g_strdup ("");
if (! config_cell_height) config_cell_height = g_strdup ("");
cols = gegl_buffer_get_width (buffer);
rows = gegl_buffer_get_height (buffer);
pika_progress_init_printf (_("Exporting '%s'"),
pika_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 (config_full_document)
{
if (! print (output, error,
"<HTML>\n<HEAD><TITLE>%s</TITLE></HEAD>\n<BODY>\n",
pika_file_get_utf8_name (file)) ||
! print (output, error, "<H1>%s</H1>\n",
pika_file_get_utf8_name (file)))
{
goto fail;
}
}
if (! print (output, error,
"<TABLE BORDER=%d CELLPADDING=%d CELLSPACING=%d>\n",
config_border, config_cell_padding, config_cell_spacing))
goto fail;
if (config_use_caption)
{
if (! print (output, error, "<CAPTION>%s</CAPTION>\n",
config_caption_text))
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 (config_cell_width, "") != 0)
{
width = g_strdup_printf (" WIDTH=\"%s\"", config_cell_width);
}
if (strcmp (config_cell_height, "") != 0)
{
height = g_strdup_printf (" HEIGHT=\"%s\" ", config_cell_height);
}
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 (config_span_tags)
{
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 (config_compress_td_tags)
{
if (! print (output, error,
"%s</TD>\n", config_cell_content))
goto fail;
}
else
{
if (! print (output, error,
"\n %s\n </TD>\n", config_cell_content))
goto fail;
}
}
}
if (! print (output, error, " </TR>\n"))
goto fail;
pika_progress_update ((double) y / (double) rows);
}
if (config_full_document)
{
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);
g_free (config_caption_text);
g_free (config_cell_content);
g_free (config_cell_width);
g_free (config_cell_height);
pika_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);
g_free (config_caption_text);
g_free (config_cell_content);
g_free (config_cell_width);
g_free (config_cell_height);
return FALSE;
}
static gint
save_dialog (PikaImage *image,
PikaProcedure *procedure,
GObject *config)
{
GtkWidget *dialog;
GtkWidget *frame;
gboolean run;
pika_ui_init (PLUG_IN_BINARY);
dialog = pika_save_procedure_dialog_new (PIKA_SAVE_PROCEDURE (procedure),
PIKA_PROCEDURE_CONFIG (config),
image);
if (pika_image_get_width (image) * pika_image_get_height (image) > 4096)
{
GtkWidget *eek;
GtkWidget *hbox;
pika_procedure_dialog_get_label (PIKA_PROCEDURE_DIALOG (dialog),
"warning-label",
_("You are about to create a huge\n"
"HTML file which will most likely\n"
"crash your browser."));
hbox = pika_procedure_dialog_fill_box (PIKA_PROCEDURE_DIALOG (dialog),
"warning-hbox", "warning-label",
NULL);
gtk_orientable_set_orientation (GTK_ORIENTABLE (hbox),
GTK_ORIENTATION_HORIZONTAL);
eek = gtk_image_new_from_icon_name (PIKA_ICON_MASCOT_EEK,
GTK_ICON_SIZE_DIALOG);
gtk_box_pack_start (GTK_BOX (hbox), eek, FALSE, FALSE, 0);
gtk_widget_show (eek);
gtk_box_reorder_child (GTK_BOX (hbox), eek, 0);
gtk_widget_set_margin_end (eek, 24);
pika_procedure_dialog_get_label (PIKA_PROCEDURE_DIALOG (dialog),
"warning-frame-label", _("Warning"));
frame = pika_procedure_dialog_fill_frame (PIKA_PROCEDURE_DIALOG (dialog),
"warning-frame",
"warning-frame-label",
FALSE, "warning-hbox");
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
pika_procedure_dialog_fill (PIKA_PROCEDURE_DIALOG (dialog),
"warning-frame", NULL);
}
/* HTML Page Options */
pika_procedure_dialog_get_label (PIKA_PROCEDURE_DIALOG (dialog),
"page-label", _("HTML Page Options"));
frame = pika_procedure_dialog_fill_frame (PIKA_PROCEDURE_DIALOG (dialog),
"page-frame",
"page-label",
FALSE, "full-document");
gtk_widget_set_margin_bottom (frame, 8);
/* HTML Table Creation Options */
pika_procedure_dialog_get_label (PIKA_PROCEDURE_DIALOG (dialog),
"creation-label",
_("Table Creation Options"));
pika_procedure_dialog_fill_box (PIKA_PROCEDURE_DIALOG (dialog),
"creation-vbox", "span-tags",
"compress-td-tags", "use-caption",
"caption-text", "cell-content", NULL);
pika_procedure_dialog_set_sensitive (PIKA_PROCEDURE_DIALOG (dialog),
"caption-text", TRUE,
config, "use-caption",
FALSE);
frame = pika_procedure_dialog_fill_frame (PIKA_PROCEDURE_DIALOG (dialog),
"creation-frame",
"creation-label",
FALSE, "creation-vbox");
gtk_widget_set_margin_bottom (frame, 8);
/* HTML Table Options */
pika_procedure_dialog_get_label (PIKA_PROCEDURE_DIALOG (dialog),
"table-label", _("Table Options"));
pika_procedure_dialog_fill_box (PIKA_PROCEDURE_DIALOG (dialog),
"table-vbox", "border", "cell-width",
"cell-height", "cell-padding",
"cell-spacing", NULL);
frame = pika_procedure_dialog_fill_frame (PIKA_PROCEDURE_DIALOG (dialog),
"table-frame", "table-label",
FALSE, "table-vbox");
gtk_widget_set_margin_bottom (frame, 8);
pika_procedure_dialog_fill (PIKA_PROCEDURE_DIALOG (dialog),
"page-frame", "creation-frame",
"table-frame", NULL);
gtk_widget_show (dialog);
run = pika_procedure_dialog_run (PIKA_PROCEDURE_DIALOG (dialog));
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]);
}
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