HGKeeper

* Talkatu - GTK widgets for chat applications

* This library 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 2 of the License, or

* (at your option) any later version.

* This library 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 library; if not, see <https://www.gnu.org/licenses/>.

#include "talkatu/talkatuhtmlpangorenderer.h"

typedef void (*TalkatuHtmlPangoRendererStartFunc)(TalkatuHtmlPangoRenderer *renderer,

const gchar *name,

const gchar **attribute_names,

const gchar **attribute_values);

typedef void (*TalkatuHtmlPangoRendererFinishFunc)(TalkatuHtmlPangoRenderer *renderer,

const gchar *name);

typedef struct {

TalkatuHtmlPangoRendererStartFunc start;

TalkatuHtmlPangoRendererFinishFunc finish;

const gchar *alias;

} TalkatuHtmlPangoRendererElementFuncs;

struct _TalkatuHtmlPangoRenderer {

TalkatuHtmlRenderer parent;

GString *str;

GHashTable *lookup;

};

G_DEFINE_TYPE(TalkatuHtmlPangoRenderer, talkatu_html_pango_renderer,

TALKATU_TYPE_HTML_RENDERER)

/******************************************************************************

* TalkatuHtmlPangoRenderer Element Functions

*****************************************************************************/

static void

talkatu_html_pango_renderer_passthrough_start(TalkatuHtmlPangoRenderer *renderer,

const gchar *name,

const gchar **attribute_names,

const gchar **attribute_values)

{

g_string_append_printf(renderer->str, "<%s>", name);

}

static void

talkatu_html_pango_renderer_passthrough_finish(TalkatuHtmlPangoRenderer *renderer,

const gchar *name)

{

g_string_append_printf(renderer->str, "</%s>", name);

}

static void

talkatu_html_pango_renderer_code_start(TalkatuHtmlPangoRenderer *renderer,

const gchar *name,

const gchar **attribute_names,

const gchar **attribute_values)

{

g_string_append(renderer->str, "<span font=\"monospace\">");

}

static void

talkatu_html_pango_renderer_link_start(TalkatuHtmlPangoRenderer *renderer,

const gchar *name,

const gchar **attribute_names,

const gchar **attribute_values)

{

gint i = 0;

g_string_append(renderer->str, "<a");

if(attribute_names != NULL) {

for(i = 0; attribute_names[i] != NULL; i++) {

if(g_ascii_strcasecmp(attribute_names[i], "href") == 0) {

g_string_append_printf(renderer->str,

" href=\"%s\"", attribute_values[i]);

}

g_string_append(renderer->str, ">");

}

static void

talkatu_html_pango_renderer_font_start(TalkatuHtmlPangoRenderer *renderer,

const gchar *name,

const gchar **attribute_names,

const gchar **attribute_values)

{

gint i = 0;

g_string_append(renderer->str, "<span");

if(attribute_names != NULL) {

for(i = 0; attribute_names[i] != NULL; i++) {

if(g_ascii_strcasecmp(attribute_names[i], "size") == 0) {

g_string_append_printf(renderer->str,

" font=\"%s\"", attribute_values[i]);

} else if(g_ascii_strcasecmp(attribute_names[i], "color") == 0) {

g_string_append_printf(renderer->str,

" foreground=\"%s\"", attribute_values[i]);

}

g_string_append(renderer->str, ">");

}

/******************************************************************************

* TalkatuHtmlRendererElementFuncs API

*****************************************************************************/

TalkatuHtmlPangoRendererElementFuncs *

talkatu_html_pango_renderer_element_funcs_new(TalkatuHtmlPangoRendererStartFunc start,

TalkatuHtmlPangoRendererFinishFunc finish,

const gchar *alias)

{

TalkatuHtmlPangoRendererElementFuncs *funcs = NULL;

funcs = g_new(TalkatuHtmlPangoRendererElementFuncs, 1);

funcs->start = start;

funcs->finish = finish;

funcs->alias = alias;

return funcs;

}

TalkatuHtmlPangoRendererElementFuncs *

talkatu_html_pango_renderer_element_funcs_new_passthrough(const gchar *alias) {

return talkatu_html_pango_renderer_element_funcs_new(

talkatu_html_pango_renderer_passthrough_start,

talkatu_html_pango_renderer_passthrough_finish,

alias

);

}

/******************************************************************************

* TalkatuHtmlRenderer Implementation

*****************************************************************************/

static void

talkatu_html_pango_renderer_reset(TalkatuHtmlRenderer *renderer) {

TalkatuHtmlPangoRenderer *pr = TALKATU_HTML_PANGO_RENDERER(renderer);

g_string_free(pr->str, TRUE);

pr->str = g_string_new("");

}

static void

talkatu_html_pango_renderer_element_start(TalkatuHtmlRenderer *renderer,

const gchar *name,

const gchar **attribute_names,

const gchar **attribute_values)

{

TalkatuHtmlPangoRenderer *pr = TALKATU_HTML_PANGO_RENDERER(renderer);

TalkatuHtmlPangoRendererElementFuncs *funcs = NULL;

funcs = g_hash_table_lookup(pr->lookup, name);

if(funcs != NULL && funcs->start != NULL) {

const gchar *real_name = (funcs->alias != NULL) ? funcs->alias : name;

funcs->start(pr, real_name, attribute_names, attribute_values);

}

static void

talkatu_html_pango_renderer_element_finish(TalkatuHtmlRenderer *renderer,

const gchar *name)

{

TalkatuHtmlPangoRenderer *pr = TALKATU_HTML_PANGO_RENDERER(renderer);

TalkatuHtmlPangoRendererElementFuncs *funcs = NULL;

funcs = g_hash_table_lookup(pr->lookup, name);

if(funcs != NULL && funcs->finish != NULL) {

const gchar *real_name = (funcs->alias != NULL) ? funcs->alias : name;

funcs->finish(pr, real_name);

}

static void

talkatu_html_pango_renderer_text(TalkatuHtmlRenderer *renderer,

const gchar *text)

{

TalkatuHtmlPangoRenderer *pr = TALKATU_HTML_PANGO_RENDERER(renderer);

g_string_append(pr->str, text);

}

/******************************************************************************

* GObject Implementation

*****************************************************************************/

static void

talkatu_html_pango_renderer_init(TalkatuHtmlPangoRenderer *renderer) {

TalkatuHtmlPangoRendererElementFuncs *funcs = NULL;

renderer->str = g_string_new("");

renderer->lookup = g_hash_table_new_full(g_str_hash, g_str_equal, NULL,

g_free);

funcs = talkatu_html_pango_renderer_element_funcs_new(

talkatu_html_pango_renderer_link_start,

talkatu_html_pango_renderer_passthrough_finish,

NULL

);

g_hash_table_insert(renderer->lookup, "a", funcs);

funcs = talkatu_html_pango_renderer_element_funcs_new_passthrough(NULL);

g_hash_table_insert(renderer->lookup, "b", funcs);

funcs = talkatu_html_pango_renderer_element_funcs_new(

talkatu_html_pango_renderer_code_start,

talkatu_html_pango_renderer_passthrough_finish,

"span"

);

g_hash_table_insert(renderer->lookup, "code", funcs);

funcs = talkatu_html_pango_renderer_element_funcs_new_passthrough(NULL);

g_hash_table_insert(renderer->lookup, "i", funcs);

funcs = talkatu_html_pango_renderer_element_funcs_new(

talkatu_html_pango_renderer_font_start,

talkatu_html_pango_renderer_passthrough_finish,

"span"

);

g_hash_table_insert(renderer->lookup, "font", funcs);

funcs = talkatu_html_pango_renderer_element_funcs_new_passthrough(NULL);

g_hash_table_insert(renderer->lookup, "s", funcs);

funcs = talkatu_html_pango_renderer_element_funcs_new_passthrough("s");

g_hash_table_insert(renderer->lookup, "strike", funcs);

funcs = talkatu_html_pango_renderer_element_funcs_new_passthrough(NULL);

g_hash_table_insert(renderer->lookup, "sub", funcs);

funcs = talkatu_html_pango_renderer_element_funcs_new_passthrough(NULL);

g_hash_table_insert(renderer->lookup, "sup", funcs);

funcs = talkatu_html_pango_renderer_element_funcs_new_passthrough(NULL);

g_hash_table_insert(renderer->lookup, "tt", funcs);

funcs = talkatu_html_pango_renderer_element_funcs_new_passthrough(NULL);

g_hash_table_insert(renderer->lookup, "u", funcs);

}

static void

talkatu_html_pango_renderer_finalize(GObject *obj) {

TalkatuHtmlPangoRenderer *renderer = TALKATU_HTML_PANGO_RENDERER(obj);

g_string_free(renderer->str, TRUE);

g_hash_table_destroy(renderer->lookup);

G_OBJECT_CLASS(talkatu_html_pango_renderer_parent_class)->finalize(obj);

}

static void

talkatu_html_pango_renderer_class_init(TalkatuHtmlPangoRendererClass *klass) {

GObjectClass *obj_class = G_OBJECT_CLASS(klass);

TalkatuHtmlRendererClass *renderer_class = TALKATU_HTML_RENDERER_CLASS(klass);

obj_class->finalize = talkatu_html_pango_renderer_finalize;

renderer_class->reset = talkatu_html_pango_renderer_reset;

renderer_class->element_start = talkatu_html_pango_renderer_element_start;

renderer_class->element_finish = talkatu_html_pango_renderer_element_finish;

renderer_class->text = talkatu_html_pango_renderer_text;

}

/******************************************************************************

* Public API

*****************************************************************************/

TalkatuHtmlRenderer *

talkatu_html_pango_renderer_new(void) {

return TALKATU_HTML_RENDERER(g_object_new(TALKATU_TYPE_HTML_PANGO_RENDERER,

NULL));

}

const gchar *

talkatu_html_pango_renderer_get_string(TalkatuHtmlPangoRenderer *renderer) {

g_return_val_if_fail(TALKATU_IS_HTML_PANGO_RENDERER(renderer), NULL);

return renderer->str->str;

}