Initial commit
authorMyhailo Danylenko <isbear@ukrpost.net>
Fri, 06 Nov 2009 00:43:15 +0200
changeset 0 29423ceb6adf
child 1 285017b7713c
Initial commit
.gitignore
CMakeLists.txt
COPYING
README
avatar.c
avatar.rc
config.h
help/en/hlp_avatar.txt
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.gitignore	Fri Nov 06 00:43:15 2009 +0200
@@ -0,0 +1,25 @@
+# ignore generated by libtool files (no more necessary)
+*.a
+*.o
+*.lo
+*.la
+*.so
+*.lai
+*.so.*
+# ignore backup files
+*~
+# ignore docs: they are not important and apiref is generated on the fly
+*.html
+# ignore generated makefile
+Makefile
+# ignore cmake files
+*.cmake
+CMake*
+CPack*
+# ignore generated header
+config.h
+# ignore resulting bundles
+*.deb
+*.tar.bz2
+# ignore build dir
+build
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CMakeLists.txt	Fri Nov 06 00:43:15 2009 +0200
@@ -0,0 +1,76 @@
+## Copyright 2009 Myhailo Danylenko
+# This file is part of mcabber module writing howto examples.
+#
+# Examples are 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 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 <http://www.gnu.org/licenses/>.
+
+cmake_minimum_required(VERSION 2.6) 
+project(avatar C) 
+
+## Target definitions
+add_library(avatar MODULE avatar.c) 
+
+## User settable options
+set(MCABBER_INCLUDE_DIR "${avatar_SOURCE_DIR}/../include" 
+    CACHE FILEPATH "Path to mcabber headers") 
+ 
+## Packaging information
+set(CPACK_PACKAGE_NAME libmcabber-avatar)
+set(CPACK_PACKAGE_VERSION "0.0.1")
+set(CPACK_PACKAGE_VENDOR "IsBear")
+set(CPACK_PACKAGE_CONTACT "Myhailo Danylenko <isbear@ukrpost.net>")
+set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "Mcabber example modularized avatar implementation")
+set(CPACK_RESOURCE_FILE_LICENSE ${avatar_SOURCE_DIR}/COPYING)
+set(CPACK_SOURCE_GENERATOR TBZ2)
+set(CPACK_GENERATOR DEB CACHE TEXT "Binary package generator, eg DEB, RPM, TGZ, NSIS...")
+set(CPACK_DEBIAN_PACKAGE_SECTION libs)
+find_program(DPKG_EXECUTABLE dpkg)
+if(DPKG_EXECUTABLE)
+	execute_process(COMMAND ${DPKG_EXECUTABLE} --print-architecture OUTPUT_VARIABLE CPACK_DEBIAN_PACKAGE_ARCHITECTURE OUTPUT_STRIP_TRAILING_WHITESPACE)
+else()
+	set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE i386 CACHE TEXT "Architecture of package")
+endif()
+set(CPACK_PACKAGE_FILE_NAME "${CPACK_PACKAGE_NAME}_${CPACK_PACKAGE_VERSION}_${CPACK_DEBIAN_PACKAGE_ARCHITECTURE}")
+set(CPACK_SOURCE_IGNORE_FILES "/\\\\..*;\\\\.swp;~$;/build/;\\\\.tar\\\\.;\\\\.deb;\\\\.so")
+include(CPack)
+
+## Check for build dependencies
+find_package(PkgConfig REQUIRED) 
+pkg_check_modules(GLIB REQUIRED glib-2.0) 
+pkg_check_modules(GMODULE REQUIRED gmodule-2.0) 
+pkg_check_modules(LM REQUIRED loudmouth-1.0)
+pkg_check_modules(PNG REQUIRED libpng12)
+set(AALIB_INCLUDE_DIRS "/usr/include" CACHE FILEPATH "Path to AAlib includes")
+set(AALIB_LIBRARIES "-laa" CACHE TEXT "Libraries, necessary to link with AAlib")
+
+## Compiler setup
+include_directories(SYSTEM ${GLIB_INCLUDE_DIRS} 
+                    ${GMODULE_INCLUDE_DIRS} 
+                    ${LM_INCLUDE_DIRS}
+					${PNG_INCLUDE_DIRS}
+					${AALIB_INCLUDE_DIRS}) 
+target_link_libraries(avatar ${GLIB_LIBRARIES} 
+                      ${GMODULE_LIBRARIES}
+					  ${LM_LIBRARIES}
+					  ${PNG_LIBRARIES}
+					  ${AALIB_LIBRARIES})
+include_directories(${avatar_SOURCE_DIR} 
+                    ${avatar_BINARY_DIR} 
+                    ${MCABBER_INCLUDE_DIR}) 
+
+## Installation
+install(TARGETS avatar DESTINATION lib/mcabber) 
+install(FILES avatar.rc DESTINATION share/doc/${CPACK_PACKAGE_NAME})
+install(DIRECTORY help DESTINATION share/mcabber)
+
+## The End ## vim: se ts=4: ##
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/COPYING	Fri Nov 06 00:43:15 2009 +0200
@@ -0,0 +1,339 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
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+    (at your option) any later version.
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+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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+
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/README	Fri Nov 06 00:43:15 2009 +0200
@@ -0,0 +1,58 @@
+
+This is a module, implementing avatar publishing/retrieving via pep/pubsub.
+This module informs you, when your buddies publish their avatars via pep
+and provides command '/avatar' to publish your own. But this is not all.
+It also will show you buddy's avatar! Yes, it is aalib :)
+
+This module depends on module 'pep'. You must load it prior to this module
+and not unload until you unload this module.
+
+For this module to actually do something you should set option
+avatars_directory - a place, where your buddy's avatars will be saved.
+
+Note, that currently only pubsub-publishing of avatars is supported
+(retrieving too works only for pubsub, but there you will be at least
+informed of url, that you can use to view avatar manually). Thus, as
+standard states, that pubsub-published data must be image/png, your
+avatar should be in png format.
+
+INSTALLATION
+
+To install it, you need:
+loudmouth
+glib
+aalib
+libpng
+mcabber's headers
+cmake
+make
+gcc
+
+Then do
+$ mkdir build
+$ cd build
+$ cmake ..
+$ make edit_cache
+$ make
+# make install
+
+Debian users can instead of make install do
+$ fakeroot make package
+# dpkg -i ...-*.deb
+
+Users of other distributions can select appropriate package
+generator, using cache editor.
+
+LICENSE
+
+This code underlies terms of GNU GPL v2 or later. You can find it in file COPYING
+from this distribution or on a GNU web-site <http://www.gnu.org/licenses/>.
+
+CONTACTS
+
+I will be happy to get feedback, patches, suggestions, etc.
+You can send me email or contact via jabber <isbear@jabber.kiev.ua>.
+
+  -- Myhailo Danylenko <isbear@ukrpost.net>
+
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/avatar.c	Fri Nov 06 00:43:15 2009 +0200
@@ -0,0 +1,1059 @@
+/*
+ * avatar.c             -- Pep avatar events
+ *
+ * Copyrigth (C) 2009      Myhailo Danylenko <isbear@ukrpost.net>
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#define PNG_USER_MEM_SUPPORTED
+
+#include <glib.h>
+#include <gmodule.h>
+#include <loudmouth/loudmouth.h>
+#include <aalib.h>
+#include <png.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include "compl.h"
+#include "commands.h"
+#include "utils.h"
+#include "xmpp.h"
+#include "screen.h"
+#include "hbuf.h"
+#include "hooks.h"
+#include "settings.h"
+#include "pep.h"
+
+#define NS_AVATAR_DATA            ( "urn:xmpp:avatar:data"            )
+#define NS_AVATAR_METADATA        ( "urn:xmpp:avatar:metadata"        )
+#define NS_AVATAR_METADATA_NOTIFY ( "urn:xmpp:avatar:metadata+notify" )
+
+static guint avatar_cid = 0;
+
+GSList *reply_handlers = NULL;
+
+// png stuff
+
+static png_voidp png_glib_malloc (png_structp ignore, png_size_t size)
+{
+	return g_malloc (size);
+}
+
+static void png_glib_free (png_structp ignore, png_voidp chunk)
+{
+	g_free (chunk);
+}
+
+// reads file and returns array of pointers to image rows in
+// grayscale 8-bit with alpha-channel format (i.e. two bytes per pixel)
+// after use just do g_free of this pointer - all data are in one memory chunk
+static png_bytep *png_read_file (const char *file, int *rheight, int *rwidth)
+{
+	FILE        *fd       = fopen (file, "rb");
+	png_infop    info_ptr;
+	png_structp  png_ptr;
+	int          rowbytes;
+	png_bytep   *row_pointers;
+	int          width;
+	int          height;
+
+	if (!fd)
+		return NULL;
+
+	{ // check signature
+		char header[8];
+
+		fread (header, 1, 8, fd);
+
+		if (png_sig_cmp (header, 0, 8)) {
+			fclose (fd);
+			return NULL;
+		}
+	}
+
+	// initialize reader
+	png_ptr = png_create_read_struct_2 (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL, NULL, png_glib_malloc, png_glib_free);
+
+	if (!png_ptr) {
+		fclose (fd);
+		return NULL;
+	}
+
+	info_ptr = png_create_info_struct (png_ptr);
+	if (!info_ptr) {
+		png_destroy_read_struct (&png_ptr, NULL, NULL);
+		fclose (fd);
+		return NULL;
+	}
+
+	if (setjmp (png_jmpbuf (png_ptr))) {
+		png_destroy_read_struct (&png_ptr, &info_ptr, NULL);
+		fclose (fd);
+		return NULL;
+	}
+
+	png_init_io (png_ptr, fd);
+	png_set_sig_bytes (png_ptr, 8);
+
+	// get information
+	png_read_info (png_ptr, info_ptr);
+
+	{ // set up transformations
+		png_byte color_type = info_ptr->color_type;
+		png_byte bit_depth  = info_ptr->bit_depth;
+
+		// trying to convert anything to grayscale 8-bit color with alpha channel
+		if (color_type == PNG_COLOR_TYPE_PALETTE) // XXX
+			png_set_palette_to_rgb (png_ptr);
+		if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8)
+			png_set_expand_gray_1_2_4_to_8 (png_ptr);
+		if (color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_PALETTE /* ??? */) // XXX
+			png_set_add_alpha (png_ptr, 0xff, PNG_FILLER_AFTER);
+		if (bit_depth == 16)
+			png_set_strip_16 (png_ptr);
+		if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
+			png_set_tRNS_to_alpha (png_ptr);
+		if (color_type == PNG_COLOR_TYPE_PALETTE /* ??? */ || color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) // XXX
+			png_set_rgb_to_gray_fixed (png_ptr, 1, -1, -1);
+
+		// renew information in info structure
+		png_read_update_info (png_ptr, info_ptr);
+	}
+
+	width    = info_ptr->width;
+	height   = info_ptr->height;
+	rowbytes = info_ptr->rowbytes;
+
+	{ // allocate buffer for image data
+		png_bytep chunk = g_malloc ((sizeof(png_bytep) + rowbytes) * height);
+		png_bytep start = chunk + sizeof(png_bytep) * height;
+		int       y;
+
+		row_pointers = (png_bytep *) chunk;
+
+		for (y = 0; y < height; ++y)
+			row_pointers[y] = start + y * rowbytes;
+	}
+
+	// read image
+	if (setjmp (png_jmpbuf (png_ptr))) {
+		g_free (row_pointers);
+		png_destroy_read_struct (&png_ptr, &info_ptr, NULL);
+		fclose (fd);
+		return NULL;
+	}
+
+	png_read_image (png_ptr, row_pointers);
+	png_read_end (png_ptr, NULL);
+
+	// free resources
+	png_destroy_read_struct (&png_ptr, &info_ptr, NULL); 
+	fclose (fd);
+
+	*rheight = height;
+	*rwidth  = width;
+
+	return row_pointers;
+}
+
+// aa stuff
+
+// converts image in format, returned by png_read_file into ascii,
+// scaling it to fit specified max values. If font parameters are
+// set properly, should result in image on screen with original png
+// aspect ratio.
+static gchar *aa_convert_image (png_bytep *row_pointers, int height, int width, int maxcharh, int maxcharw, int fonth, int fontw)
+{
+	gchar                     *result;
+	struct aa_hardware_params  hwparams = {
+		.font      = NULL,
+		.supported = AA_NORMAL_MASK,
+		.width     = 0,
+		.height    = 0,
+	};
+
+	// params for zooming
+	int finalcharh;
+	int finalcharw;
+	int finalh;
+	int finalw;
+	int starty;
+	int startx;
+	int finalratioh;
+	int finalratiow;
+
+	// process aa parameters from environment variables
+	aa_parseoptions (&hwparams, NULL, NULL, NULL);
+
+	{ // calculate parameters for image zooming into aa surface
+	  // this always makes me a hard time, thus such a mess :/
+	  // I hope, compiler will optimize out all these variables...
+
+		// font size in font pixels (real?)
+		//int fonth = 16;
+		//int fontw = 8;
+		float fontaspect = (float) fontw / fonth;
+		// aa pixels per character
+		const int aappch = 2;
+		const int aappcw = 2;
+		const float aaaspect = (float) aappcw / aappch;
+		// font pixels per aa pixel
+		int aappph = (float) fonth / aappch;
+		int aapppw = (float) fontw / aappcw;
+		float aapixelaspect = (float) aapppw / aappph;
+		// original image size in real pixels
+		int originh = height;
+		int originw = width;
+		float originaspect = (float) originw / originh;
+		// maximal resulting image size in chars
+		//int maxcharh = res_height;
+		//int maxcharw = res_width;
+		// maximal resulting image size in aa pixels
+		int maxh = maxcharh * aappch;
+		int maxw = maxcharw * aappcw;
+		// maximal resulting image size in real pixels
+		int maxh_rp;
+		int maxw_rp;
+		if (aapixelaspect > 1) {
+			maxh_rp = maxh;
+			maxw_rp = (float) maxw * aapixelaspect;
+		} else {
+			maxh_rp = (float) maxh / aapixelaspect;
+			maxw_rp = maxw;
+		}
+		float maxaspect_rp = (float) maxw_rp / maxh_rp;
+		// resulting image size in real pixels
+		float ratio_rp;
+		int resh_rp;
+		int resw_rp;
+		if (originh > maxh_rp || originw > maxw_rp) {
+			// boundaries crossed, will zoom
+			if (originaspect > maxaspect_rp) {
+				// width is bigger
+				ratio_rp = (float) maxw_rp / originw;
+				resh_rp = (float) originh * ratio_rp;
+				resw_rp = maxw_rp;
+			} else {
+				// height is bigger
+				ratio_rp = (float) maxh_rp / originh;
+				resh_rp = maxh_rp;
+				resw_rp = (float) originw * ratio_rp;
+			}
+		} else {
+			// image fits, no zooming
+			ratio_rp = 1;
+			resh_rp = originh;
+			resw_rp = originw;
+		}
+		// resulting image size in aa pixels
+		int resh;
+		int resw;
+		if (aapixelaspect > 1) {
+			resh = resh_rp;
+			resw = (float) resw_rp / aapixelaspect;
+		} else {
+			resh = (float) resh_rp * aapixelaspect;
+			resw = resw_rp;
+		}
+		// number of original image pixels per one resulting image pixel
+		int ratioh = (float) originh / resh;
+		int ratiow = (float) originw / resw;
+		// resulting image size in chars
+		int rescharh = (float) resh / aappch;
+		int rescharw = (float) resw / aappcw;
+
+		// re-calculate parameters, as they may change due to rounding (?)
+		finalcharh = rescharh;
+		finalcharw = rescharw;
+		finalh = rescharh * aappch;
+		finalw = rescharw * aappcw;
+		int finalh_rp;
+		int finalw_rp;
+		if (aapixelaspect > 1) {
+			finalh_rp = finalh;
+			finalw_rp = (float) finalw * aapixelaspect;
+		} else {
+			finalh_rp = (float) finalh / aapixelaspect;
+			finalw_rp = finalw;
+		}
+		finalratioh = (float) originh / finalh;
+		finalratiow = (float) originw / finalw;
+
+		// center image part actually used
+		int areah = (float) finalh * finalratioh;
+		int areaw = (float) finalw * finalratiow;
+		int losth = originh - areah;
+		int lostw = originw - areaw;
+		starty = losth / 2;
+		startx = lostw / 2;
+	}
+
+	// create aa image
+	hwparams.height = finalcharh;
+	hwparams.width  = finalcharw;
+
+	aa_context *context = aa_init (&mem_d, &hwparams, NULL);
+
+	if (context == NULL)
+		return NULL;
+
+	{ // fill aa image from png buffer with scaling
+		int       height, width;
+		const int bpp = 2;
+		int       y;
+
+		height = aa_imgheight (context);
+		width  = aa_imgwidth (context);
+		
+		if (height > finalh)
+			height = finalh;
+		if (width > finalw)
+			width = finalw;
+
+		for (y = 0;  y < height; ++y) {
+			int x;
+
+			for (x = 0; x < width; ++x) {
+				png_bytep    *row_pointer = row_pointers + starty + y * finalratioh;
+				unsigned int  color = 0;
+				unsigned int  cy;
+
+				// just arithmetic average
+				for (cy = 0; cy < finalratioh; ++cy) {
+					png_bytep row = row_pointer[cy] + (startx + x * finalratiow) * bpp;
+					int       cx;
+
+					for (cx = 0; cx < finalratiow; ++cx)
+						color += row[cx * bpp] * row[cx * bpp + 1] / 255;
+				}
+
+				color /= finalratioh * finalratiow;
+
+				aa_putpixel (context, x, y, color);
+			}
+		}
+	}
+
+	// render ascii image
+	aa_render (context, &aa_defrenderparams, 0, 0, aa_scrwidth (context), aa_scrheight (context));
+	aa_flush (context);
+
+	{ // format the result
+		char    *text   = aa_text (context);
+		int      width  = aa_scrwidth (context);
+		int      height = aa_scrheight (context);
+		GString *avatar = g_string_new (NULL);
+		char    *end    = text + width * height;
+
+		while (text < end) {
+			g_string_append_len (avatar, text, width);
+			g_string_append_c (avatar, '\n');
+			text += width;
+		}
+
+		// strip last '\n'
+		g_string_truncate (avatar, avatar->len - 1);
+
+		result = g_string_free (avatar, FALSE);
+
+	}
+
+	// free resources
+	aa_close (context);
+
+	return result;
+}
+
+// avatar stuff
+
+// returns filename to save this avatar. NULL on error. g_free result.
+static gchar *avatar_id_filename (const gchar *id)
+{
+	gchar *escid = g_strdup (id);
+	gchar *dir   = (gchar *) settings_opt_get ("avatar_directory");
+	gchar *file;
+	
+	if (!dir)
+		return NULL;
+	
+	{ // neutralize id
+		const gchar *valid = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+	
+		g_strcanon (escid, valid, '_');
+	}
+	
+	dir = expand_filename (dir);
+	
+	file = g_strdup_printf ("%s/%s.png", dir, escid);
+	
+	g_free (dir);
+	g_free (escid);
+
+	return file;
+}
+
+// returns name of symlink to avatar image file for this jid
+static gchar *avatar_jid_filename (const gchar *jid)
+{
+	gchar *dir  = (gchar *) settings_opt_get ("avatar_directory");
+	gchar *file = NULL;
+	gchar *bjid;
+
+	if (!dir)
+		return NULL;
+
+	// if jid validity alone is enough for mcabber to use as
+	// names for history logs, it's fine for us too.
+	if (check_jid_syntax (jid))
+		return NULL;
+
+	bjid = jidtodisp (jid);
+	mc_strtolower (bjid);
+	dir  = expand_filename (dir);
+	file = g_strdup_printf ("%s/%s", dir, bjid);
+
+	g_free (bjid);
+	return file;
+}
+
+// symlinks specified jid to specified file. performs jid
+// checks, but not file checks.
+static void set_jid_avatar (const char *jid, const char *file)
+{
+	gchar *jfile;
+
+	if (!jid || !file)
+		return;
+
+	jfile = avatar_jid_filename (jid);
+
+	if (!jfile)
+		return;
+	
+	unlink (jfile);
+	if (symlink (file, jfile) == -1)
+		scr_LogPrint (LPRINT_LOGNORM, "avatar: Cannot symlink jid-file to avatar: %s.", strerror (errno));
+}
+
+// reply handler for metadata publish request
+// just prints error message if unsuccessful
+LmHandlerResult avatar_publish_metadata_reply_handler (LmMessageHandler *handler, LmConnection *connection, LmMessage *message, gpointer userdata)
+{
+	reply_handlers = g_slist_remove (reply_handlers, handler);
+
+	switch (lm_message_get_sub_type (message)) {
+	case LM_MESSAGE_SUB_TYPE_RESULT:
+		break;
+
+	case LM_MESSAGE_SUB_TYPE_ERROR:
+
+		{
+			LmMessageNode *node   = lm_message_get_node (message);
+			const gchar   *type;
+			const gchar   *reason;
+	
+			node = lm_message_node_get_child (node, "error");
+			type = lm_message_node_get_attribute (node, "type");
+			if (node->children)
+				reason = node->children->name;
+			else
+				reason = "undefined";
+	
+			scr_LogPrint (LPRINT_LOGNORM, "avatar: Metadata publishing failed: %s - %s.", type, reason);
+		}
+
+		break;
+
+	default:
+		return LM_HANDLER_RESULT_ALLOW_MORE_HANDLERS;
+		break;
+	}
+
+	return LM_HANDLER_RESULT_REMOVE_MESSAGE;
+}
+
+// reply handler for data publish request
+// sends metadata update request or prints error message
+LmHandlerResult avatar_publish_data_reply_handler (LmMessageHandler *handler, LmConnection *connection, LmMessage *message, gpointer userdata)
+{
+	LmMessage *request = (LmMessage *) userdata;
+
+	reply_handlers = g_slist_remove (reply_handlers, handler);
+	
+	switch (lm_message_get_sub_type (message)) {
+	case LM_MESSAGE_SUB_TYPE_RESULT:
+
+		{
+			// XXX we may use only one instance of this...
+			LmMessageHandler *mhandler = lm_message_handler_new (avatar_publish_metadata_reply_handler, NULL, NULL);
+
+			reply_handlers = g_slist_append (reply_handlers, mhandler);
+
+			lm_connection_send_with_reply (connection, request, mhandler, NULL);
+
+			lm_message_handler_unref (mhandler);
+			lm_message_unref (request);
+		}
+
+		break;
+
+	case LM_MESSAGE_SUB_TYPE_ERROR:
+
+		{
+			LmMessageNode *node   = lm_message_get_node (message);
+			const gchar   *type;
+			const gchar   *reason;
+
+			node = lm_message_node_get_child (node, "error");
+			type = lm_message_node_get_attribute (node, "type");
+			if (node->children)
+				reason = node->children->name;
+			else
+				reason = "undefined";
+
+			scr_LogPrint (LPRINT_LOGNORM, "avatar: Data publishing failed: %s - %s.", type, reason);
+		}
+
+		break;
+
+	default:
+		return LM_HANDLER_RESULT_ALLOW_MORE_HANDLERS;
+		break;
+	}
+
+	return LM_HANDLER_RESULT_REMOVE_MESSAGE;
+}
+
+// prints avatar (if available) for jid into jid's buffer
+// id can be omitted
+static gboolean print_avatar (const gchar *file, const gchar *jid, const gchar *id)
+{
+	png_bytep *row_pointers;
+	gchar     *avatar;
+	int        width;
+	int        height;
+
+	if (!file)
+		return FALSE;
+
+	{ // check if file exists to not trigger unnecessary error messages
+		struct stat buf;
+
+		if (stat (file, &buf) == -1) {
+			gchar *bjid = jidtodisp (jid);
+
+			scr_WriteIncomingMessage (bjid, "No avatar for this buddy yet.", 0, HBB_PREFIX_INFO|HBB_PREFIX_NOFLAG, 0); // NO conversion from utf-8
+
+			g_free (bjid);
+		}
+	}
+
+	row_pointers = png_read_file (file, &width, &height);
+
+	if (!row_pointers) {
+		scr_LogPrint (LPRINT_LOGNORM, "avatar: Cannot decode png data from file %s.", file);
+		return FALSE;
+	}
+
+	{ // convert to ascii
+		int maxcharh = settings_opt_get_int ("avatar_max_height");
+		int maxcharw = settings_opt_get_int ("avatar_max_width");
+		int fonth    = settings_opt_get_int ("avatar_font_height");
+		int fontw    = settings_opt_get_int ("avatar_font_width");
+
+		// if not set explicitly, try to calculate available space
+		if (!maxcharh) {
+			char *var = getenv ("LINES");
+
+			if (var)
+				maxcharh = atoi (var);
+			else
+				maxcharh = 25;
+
+			maxcharh -= settings_opt_get_int ("log_win_height") + 3 + 1; // +1 due to avatar header line
+		}
+
+		if (!maxcharw) {
+			char *var = getenv ("COLUMNS");
+
+			if (var)
+				maxcharw = atoi (var);
+			else
+				maxcharw = 80;
+
+			maxcharw -= settings_opt_get_int ("roster_width") + scr_getprefixwidth ();
+		}
+
+		if (!fonth)
+			fonth = 16;
+		if (!fontw)
+			fontw = 8;
+
+		avatar = aa_convert_image (row_pointers, width, height, maxcharh, maxcharw, fonth, fontw);
+	}
+
+	g_free (row_pointers);
+
+	if (!avatar) {
+		scr_LogPrint (LPRINT_LOGNORM, "avatar: Error converting image to ascii.");
+		return FALSE;
+	}
+
+	{ // print out avatar
+		gchar *bjid = jidtodisp (jid);
+		gchar *mesg;
+		if (id)
+			mesg = g_strdup_printf ("Avatar [%s]:\n%s", id, avatar);
+		else
+			mesg = g_strdup_printf ("Avatar:\n%s", avatar);
+
+		scr_WriteIncomingMessage (bjid, mesg, 0, HBB_PREFIX_INFO|HBB_PREFIX_NOFLAG, 0); // NO conversion from utf-8
+
+		g_free (bjid);
+		g_free (mesg);
+	}
+
+	g_free (avatar);
+
+	return TRUE;
+}
+
+// reply handler for image/png data request
+// saves image and prints it to buddy buffer
+LmHandlerResult avatar_retrieve_data_reply_handler (LmMessageHandler *handler, LmConnection *connection, LmMessage *message, gpointer userdata)
+{
+	gchar *from = (gchar *) userdata;
+
+	reply_handlers = g_slist_remove (reply_handlers, handler);
+	
+	switch (lm_message_get_sub_type (message)) {
+	case LM_MESSAGE_SUB_TYPE_RESULT:
+
+		{
+			LmMessageNode *node = lm_message_get_node (message);
+			node = lm_message_node_get_child (node, "pubsub");
+			if (!node)
+				return LM_HANDLER_RESULT_ALLOW_MORE_HANDLERS;
+
+			node = lm_message_node_get_child (node, "items");
+			if (!node)
+				return LM_HANDLER_RESULT_ALLOW_MORE_HANDLERS;
+
+			{
+				LmMessageNode *item;
+				
+				for (item = node->children; item; item = item->next) {
+					if (!strcmp (item->name, "item")) {
+						LmMessageNode *data = lm_message_node_get_child (item, "data");
+						const gchar   *id   = lm_message_node_get_attribute (item, "id");
+
+						if (!data)
+							continue;
+
+						{ // save to file and display in ascii
+							const gchar *base64 = lm_message_node_get_value (data);
+							gchar       *png;
+							gsize        len;
+							gchar       *file;
+
+							if (!base64)
+								continue;
+
+							png = g_base64_decode (base64, &len);
+
+							if (!png)
+								continue;
+
+							file = avatar_id_filename (id);
+
+							if (!file) {
+								g_free (png);
+								continue;
+							}
+	
+							{ // write image to file
+								int fd = open (file, O_WRONLY|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
+
+								if (fd == -1) {
+									scr_LogPrint (LPRINT_LOGNORM, "avatar: Cannot create file: %s.", strerror (errno));
+									g_free (png);
+									g_free (file);
+									continue;
+								}
+
+								write (fd, png, len);
+								close (fd);
+							}
+
+							// create jid symlink to avatar image
+							set_jid_avatar (from, file);
+
+							g_free (png);
+
+							// read it back :/
+							print_avatar (file, from, id);
+
+							g_free (file);
+						}
+					}
+				}
+			}
+		}
+
+		break;
+
+	case LM_MESSAGE_SUB_TYPE_ERROR:
+
+		{
+			LmMessageNode *node   = lm_message_get_node (message);
+			const gchar   *type;
+			const gchar   *reason;
+
+			node = lm_message_node_get_child (node, "error");
+			type = lm_message_node_get_attribute (node, "type");
+			if (node->children)
+				reason = node->children->name;
+			else
+				reason = "undefined";
+
+			scr_LogPrint (LPRINT_LOGNORM, "avatar: Obtaining avatar data for %s failed: %s - %s.", from, type, reason);
+		}
+
+		break;
+
+	default:
+		return LM_HANDLER_RESULT_ALLOW_MORE_HANDLERS;
+		break;
+	}
+
+	return LM_HANDLER_RESULT_REMOVE_MESSAGE;
+}
+
+// data is image/png data of length len
+// call with len = 0 to publish empty avatar
+static void avatar_publish (const gchar *data, gsize len)
+{
+	LmMessage        *datarequest;
+	LmMessageHandler *handler;
+	gchar            *id;
+	LmMessage        *request;
+	LmMessageNode    *node;
+
+	request = lm_message_new_with_sub_type (NULL, LM_MESSAGE_TYPE_IQ, LM_MESSAGE_SUB_TYPE_SET);
+	node = lm_message_get_node (request);
+
+	if (len) {
+		// create data publish request
+		lm_message_node_set_attribute (node, "from", lm_connection_get_jid (lconnection));
+	
+		node = lm_message_node_add_child (node, "pubsub", NULL);
+		lm_message_node_set_attribute (node, "xmlns", NS_PUBSUB);
+	
+		node = lm_message_node_add_child (node, "publish", NULL);
+		lm_message_node_set_attribute (node, "node", NS_AVATAR_DATA);
+	
+		node = lm_message_node_add_child (node, "item", NULL);
+		id = g_compute_checksum_for_data (G_CHECKSUM_SHA1, data, len);
+		lm_message_node_set_attribute (node, "id", id);
+	
+		{
+			gchar *base64 = g_base64_encode (data, len);
+	
+			node = lm_message_node_add_child (node, "data", base64);
+			lm_message_node_set_attribute (node, "xmlns", NS_AVATAR_DATA);
+	
+			g_free (base64);
+		}
+
+		// then create metadata publish request to be supplied to reply handler as userdata
+		datarequest = lm_message_new_with_sub_type (NULL, LM_MESSAGE_TYPE_IQ, LM_MESSAGE_SUB_TYPE_SET);
+		node = lm_message_get_node (datarequest);
+	}
+
+	lm_message_node_set_attribute (node, "from", lm_connection_get_jid (lconnection));
+
+	node = lm_message_node_add_child (node, "pubsub", NULL);
+	lm_message_node_set_attribute (node, "xmlns", NS_PUBSUB);
+
+	node = lm_message_node_add_child (node, "publish", NULL);
+	lm_message_node_set_attribute (node, "node", NS_AVATAR_METADATA);
+
+	node = lm_message_node_add_child (node, "item", NULL);
+	if (len)
+		lm_message_node_set_attribute (node, "id", id);
+
+	node = lm_message_node_add_child (node, "metadata", NULL);
+	lm_message_node_set_attribute (node, "xmlns", NS_AVATAR_METADATA);
+
+	if (len) {
+		gchar *bytes = g_strdup_printf ("%d", len);
+
+		node = lm_message_node_add_child (node, "info", NULL);
+		lm_message_node_set_attributes (node, "bytes", bytes, "id", id, "type", "image/png", NULL);
+
+		g_free (bytes);
+	}
+
+	// create handler
+	if (len) 
+		handler = lm_message_handler_new (avatar_publish_data_reply_handler, (gpointer) datarequest, (GDestroyNotify) lm_message_unref /* custom, remove from queue? */);
+	else 
+		handler = lm_message_handler_new (avatar_publish_metadata_reply_handler, NULL, NULL);
+	reply_handlers = g_slist_append (reply_handlers, handler);
+
+	// send
+	lm_connection_send_with_reply (lconnection, request, handler, NULL);
+
+	lm_message_handler_unref (handler);
+	lm_message_unref (request);
+}
+
+// pep node handler
+// if avatar is not yet saved, sends data request, else updates jid's symlink
+static void avatar_handler (const gchar *from, const gchar *enode, LmMessageNode *n, const gchar *id, gpointer ignore)
+{
+	LmMessageNode *node;
+
+	// well, anyway we now do not store information about jid-avatar relationship,
+	// thus "no avatar" publishes are meaningless to us
+	for (node = n->children; node; node = node->next) {
+		const gchar *name = node->name;
+
+		if (!strcmp (name, "info")) {
+			gchar       *jid    = jidtodisp (from);
+			const gchar *url    = lm_message_node_get_attribute (node, "url");
+			const gchar *type   = lm_message_node_get_attribute (node, "type");
+			const gchar *id     = lm_message_node_get_attribute (node, "id");
+			const gchar *bytes  = lm_message_node_get_attribute (node, "bytes");
+			const gchar *height = lm_message_node_get_attribute (node, "height");
+			const gchar *width  = lm_message_node_get_attribute (node, "width");
+
+			{ // print to buddy's buffer
+				GString *mesg = g_string_new ("Avatar:");
+				gchar   *text;
+
+				// [id] type w x h (# bytes) url
+				g_string_append_printf (mesg, " [%s]", id ? id : "(none)");
+
+				if (type) {
+					g_string_append_c (mesg, ' ');
+					g_string_append (mesg, type);
+				}
+
+				if (width && height)
+					g_string_append_printf (mesg, " %s x %s", width, height);
+
+				if (bytes)
+					g_string_append_printf (mesg, " (%s bytes)", bytes);
+
+				if (url) {
+					g_string_append_c (mesg, ' ');
+					g_string_append (mesg, url);
+				}
+
+				text = g_string_free (mesg, FALSE);
+
+				scr_WriteIncomingMessage (jid, text, 0, HBB_PREFIX_INFO|HBB_PREFIX_NOFLAG, 0); // NO conversion from utf-8
+
+				g_free (text);
+			}
+
+			if (!url) {
+				// it is server-published png, go ahead and request data
+				LmMessage        *request;
+				LmMessageNode    *node;
+				LmMessageHandler *dhandler;
+
+				{ // check, if file already exists
+					gchar       *file = avatar_id_filename (id);
+					struct stat  buf;
+
+					if (!file) {
+						scr_LogPrint (LPRINT_LOGNORM, "avatar: Cannot obtain filename to save file, probably avatar_directory is not set.");
+						g_free (jid);
+						continue;
+					}
+					
+					if (stat (file, &buf) != -1) {
+						scr_WriteIncomingMessage (jid, "Avatar file exists, will not download.", 0, HBB_PREFIX_INFO|HBB_PREFIX_NOFLAG, 0);
+						// link jid to this file
+						set_jid_avatar (jid, file);
+						g_free (file);
+						g_free (jid);
+						continue;
+					}
+
+					g_free (file);
+				}
+
+				// create data request
+				request = lm_message_new_with_sub_type (jid, LM_MESSAGE_TYPE_IQ, LM_MESSAGE_SUB_TYPE_GET);
+				node = lm_message_get_node (request);
+				lm_message_node_set_attribute (node, "from", lm_connection_get_jid (lconnection));
+
+				node = lm_message_node_add_child (node, "pubsub", NULL);
+				lm_message_node_set_attribute (node, "xmlns", NS_PUBSUB);
+
+				node = lm_message_node_add_child (node, "items", NULL);
+				lm_message_node_set_attribute (node, "node", NS_AVATAR_DATA);
+
+				node = lm_message_node_add_child (node, "item", NULL);
+				lm_message_node_set_attribute (node, "id", id);
+
+				// create handler
+				dhandler = lm_message_handler_new (avatar_retrieve_data_reply_handler, jid, g_free);
+				reply_handlers = g_slist_append (reply_handlers, dhandler);
+
+				// send
+				lm_connection_send_with_reply (lconnection, request, dhandler, NULL);
+
+				lm_message_handler_unref (dhandler);
+				lm_message_unref (request);
+
+				// NOT free jid here - it will be freed on handler destruction
+			} else
+				g_free (jid);
+		}
+	}
+}
+
+// /AVATAR [filename|-]
+static void do_avatar (char *arg)
+{
+	gchar *fname;
+	gchar *data;
+	gsize  len;
+
+	if (!*arg) { // print current byddy's avatar
+		const gchar *jid = CURRENT_JID;
+
+		if (!jid) {
+			scr_LogPrint (LPRINT_NORMAL, "This item cannot have avatar.");
+			return;
+		}
+
+		fname = avatar_jid_filename (jid);
+
+		print_avatar (fname, jid, NULL);
+
+		g_free (fname);
+		return;
+	}
+
+	// publish
+	if (arg[0] == '-' && arg[1] == '\0') {
+		// no avatar
+		avatar_publish (NULL, 0);
+		return;
+	}
+
+	fname = expand_filename (arg);
+
+	{ // read file
+		char     buffer[1024];
+		GString *datastring;
+		int      fd           = open (fname, O_RDONLY);
+
+		if (!fd) {
+			scr_LogPrint (LPRINT_NORMAL, "Cannot open file '%s': %s.", fname, strerror (errno));
+			g_free (fname);
+			return;
+		}
+
+		datastring = g_string_new (NULL);
+
+		{ // read data
+			int ret;
+			while ((ret = read (fd, buffer, 1024)) > 0)
+				g_string_append_len (datastring, buffer, ret);
+		}
+
+		close (fd);
+
+		len  = datastring->len;
+		data = g_string_free (datastring, FALSE);
+	}
+
+	g_free (fname);
+
+	avatar_publish (data, len);
+
+	g_free (data);
+}
+
+static void avatar_free_reply_handlers (void)
+{
+	GSList *hel;
+
+	// let's hope, that after invalidation, lm will remove and free unreffed by us handler
+	for (hel = reply_handlers; hel; hel = hel->next) {
+		LmMessageHandler *handler = (LmMessageHandler *) hel->data;
+		lm_message_handler_invalidate (handler);
+	}
+
+	g_slist_free (reply_handlers);
+	reply_handlers = NULL;
+}
+
+// release handlers before reconnect
+static void avatar_hh (guint32 hid, hk_arg_t *args, gpointer userdata)
+{
+	hk_arg_t *arg;
+
+	for (arg = args; arg->name; arg++) {
+		if (!strcmp (arg->name, "hook") && !strcmp (arg->value, "hook-pre-disconnect")) {
+			avatar_free_reply_handlers ();
+			return;
+		}
+	}
+}
+
+const gchar *g_module_check_init (GModule *module)
+{
+	pep_register_xmlns_handler (NS_AVATAR_METADATA, avatar_handler, NULL, NULL);
+
+	cmd_add ("avatar", "", COMPL_FILENAME, 0, do_avatar, NULL);
+	
+	hk_add_handler (avatar_hh, HOOK_INTERNAL, NULL);
+
+	xmpp_add_feature (NS_AVATAR_METADATA);
+	xmpp_add_feature (NS_AVATAR_METADATA_NOTIFY);
+
+	return NULL;
+}
+
+void g_module_unload (GModule *module)
+{
+	pep_unregister_xmlns_handler (NS_AVATAR_METADATA);
+
+	avatar_free_reply_handlers ();
+
+	hk_del_handler (avatar_hh, NULL);
+
+	cmd_del ("avatar");
+
+	xmpp_del_feature (NS_AVATAR_METADATA);
+	xmpp_del_feature (NS_AVATAR_METADATA_NOTIFY);
+}
+
+/* vim: se ts=4: */
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/avatar.rc	Fri Nov 06 00:43:15 2009 +0200
@@ -0,0 +1,25 @@
+
+# All options can be changed in runtime, so, feel free to experiment
+
+# Directory, where avatars will be saved. Note, that without saving
+# avatar current implementation cannot show it. Avatars are saved by
+# their id (sha1sum of png data), and symlinked by jids. I.e.
+# 12345...679.png contains png data
+# foo@bar.org is symlink to 12345...679.png
+set avatar_directory = ~/.mcabber/avatars
+
+# Set this to your terminal's font character dimensions in pixels.
+# This will allow to retain real png image proportions.
+set avatar_font_height = 16
+set avatar_font_width  = 8
+
+# Maximum width and height in characters. Can be omitted, then these
+# will be autodetected based on COLUMNS and LINES variables (they
+# must exist in mcabber's environment, i.e. you should export them
+# or you will be limited to 80x25). 
+set avatar_max_width  = 110
+set avatar_max_height = 40
+
+load pep
+load avatar
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/config.h	Fri Nov 06 00:43:15 2009 +0200
@@ -0,0 +1,8 @@
+
+#ifndef LOCAL_CONFIG_H
+#define LOCAL_CONFIG_H
+
+#define MODULES_ENABLE 1
+
+# endif
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/help/en/hlp_avatar.txt	Fri Nov 06 00:43:15 2009 +0200
@@ -0,0 +1,6 @@
+
+ /AVATAR [filename.png|-]
+
+Publishes filename as your avatar via pep. Specify - to remove avatar. Without argument shows current byddy's avatar.
+Note: standard states, that avatar MUST be of type image/png, thus, no support for anything alse.
+Note: url avatars are not supported yet.