ede/evoke/Xsm.cpp

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/*
* $Id$
*
* Evoke, head honcho of everything
* Part of Equinox Desktop Environment (EDE).
* Copyright (c) 2000-2007 EDE Authors.
*
* This program is licensed under terms of the
* GNU General Public License version 2 or newer.
* See COPYING for details.
*/
#include "Xsm.h"
#include <edelib/Debug.h>
#include <edelib/TiXml.h>
#include <edelib/File.h>
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#include <edelib/Color.h>
#include <edelib/String.h>
#include <edelib/Util.h>
#include <edelib/Directory.h>
#include <edelib/XSettingsCommon.h>
#include <string.h>
#include <limits.h>
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#include <FL/x.h>
#include <X11/Xresource.h>
#define USER_XRESOURCE ".Xdefaults"
#define USER_XRESOURCE_TMP ".Xdefaults-tmp"
#define USER_XRESOURCE_SAVED ".Xdefaults-ede-saved"
struct ResourceMap {
char* name;
char* xresource_key;
char* xresource_klass;
};
/*
* Make sure xresource_klass with '*' is listed last since it have
* highest priority and will override all previous classes (X Resource class, not C++ one :P)
* with the same xresource_key.
*/
ResourceMap resource_map [] = {
{ "Fltk/Background2", "background", "*Text" },
{ "Fltk/Background", "background", "*" },
{ "Fltk/Foreground", "foreground", "*" }
};
#define RESOURCE_MAP_SIZE(x) (sizeof(x)/sizeof(x[0]))
int ignore_xerrors(Display* display, XErrorEvent* xev) {
return True;
}
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Xsm::Xsm() {
}
Xsm::~Xsm() {
EDEBUG("Xsm::~Xsm()\n");
}
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/*
* This is a short explaination how evoke's XSETTINGS part is combined
* with X Resource database (xrdb). First of all, why mess with this? Almost
* all pure X apps (xterm, xedit, rxvt) reads color (and more) from xrdb, not to say
* that FLTK apps do that too, at least those not linked with edelib::Window. On other
* hand since edelib::Window already have builtin XSETTINGS and FLTK backend, you will
* that colors for edelib::Window will be specified twice, but this is not a big deal
* since painting is done only once.
*
* Here, in the code, we look for XSETTINGS names listed in resource_map[] and they should
* be colors only; when they are found, their equivalents will be created in xrdb as class/key
* (see X Resource manual about these).
*
* Values picked up from XSETTINGS color items will be converted to html since because clients
* who reads xrdb expects html colors (or X11 ones, like red/green/blue names, but let we not
* complicate). After conversion, everything is stored in ~/.Xdefaults file. If this file
* already exists (someone else made it), it will be first merged, picking old values and backed up.
*
* After evoke quits, file is restored, if existed before or deleted if not. This is also a
* workaround for missing functions to delete key/value pairs from xrdb (what was they thinking for??).
*/
void Xsm::xresource_replace(void) {
// with inheritance we got manager_data
if(!manager_data->settings)
return;
edelib::String home = edelib::dir_home();
// try to open ~/.Xdefaults; if failed, X Resource will not complain
edelib::String db_file = edelib::build_filename("/", home.c_str(), USER_XRESOURCE);
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// initialize XResource manager
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XrmInitialize();
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// load XResource database
XrmDatabase db = XrmGetFileDatabase(db_file.c_str());
edelib::XSettingsSetting* s;
int status;
char* type, *value;
XrmValue xrmv;
char color_val[8];
edelib::String tmp;
/*
* XSETTINGS does not contains duplicate entries so there is no need to
* check for them. We only scan ResourceMap table for XSETTINGS name and
* its X Resource equivalent.
*/
for(unsigned int i = 0; i < RESOURCE_MAP_SIZE(resource_map); i++) {
s = edelib::xsettings_list_find(manager_data->settings, resource_map[i].name);
if(!s)
continue;
// assure that XSETTINGS key is color type
if(s->type != edelib::XSETTINGS_TYPE_COLOR) {
EWARNING(ESTRLOC ": Expected color type in %s, but it is not, skipping...\n", s->name);
continue;
}
// check if resource is present
status = XrmGetResource(db, resource_map[i].xresource_key, resource_map[i].xresource_klass, &type, &xrmv);
if(status && strcmp(type, "String") == 0) {
EDEBUG(ESTRLOC ": %s.%s found in database\n",
resource_map[i].xresource_klass, resource_map[i].xresource_key);
value = xrmv.addr;
}
/*
* Now convert color from XSETTINGS to html value. First convert to fltk color.
* TODO: Strange, didn't implemented something like color_rgb_to_html in edelib ?
*/
int fltk_color = edelib::color_rgb_to_fltk(s->data.v_color.red, s->data.v_color.green, s->data.v_color.blue);
edelib::color_fltk_to_html(fltk_color, color_val);
// and save it
tmp.clear();
tmp.printf("%s.%s: %s", resource_map[i].xresource_klass, resource_map[i].xresource_key, color_val);
XrmPutLineResource(&db, tmp.c_str());
}
edelib::String tmp_db_file = edelib::build_filename("/", home.c_str(), USER_XRESOURCE_TMP);
/*
* Try to merge existing ~/.Xdefaults (if present) with our changes. If there is existing
* key/values, they will be replaced with our. If XrmCombineFileDatabase() fails, this means
* there is no ~/.Xdefaults, so we don't need to backup it; opposite, backup it before we do
* final rename.
*/
status = XrmCombineFileDatabase(db_file.c_str(), &db, 0);
XrmPutFileDatabase(db, tmp_db_file.c_str());
//XrmSetDatabase(fl_display, db);
XrmDestroyDatabase(db);
if(status) {
edelib::String db_backup = edelib::build_filename("/", home.c_str(), USER_XRESOURCE_SAVED);
edelib::file_rename(db_file.c_str(), db_backup.c_str());
}
edelib::file_rename(tmp_db_file.c_str(), db_file.c_str());
}
void Xsm::xresource_undo(void) {
edelib::String home, db_file_backup, db_file;
home = edelib::dir_home();
db_file_backup = edelib::build_filename("/", home.c_str(), USER_XRESOURCE_SAVED);
db_file = edelib::build_filename("/", home.c_str(), USER_XRESOURCE);
/*
* If we have backup, restore it; otherwise delete ~/.Xdefaults.
* TODO: what if user something write in it? Changes will be lost...
*/
if(edelib::file_exists(db_file_backup.c_str()))
edelib::file_rename(db_file_backup.c_str(), db_file.c_str());
else
edelib::file_remove(db_file.c_str());
}
bool Xsm::load_serialized(const char* file) {
TiXmlDocument doc(file);
if(!doc.LoadFile())
return false;
const char* name = NULL, *type = NULL;
const char* v_string = NULL;
int v_int = 0;
int v_red = 0, v_green = 0, v_blue = 0, v_alpha = 0;
int cmp = 0;
TiXmlNode* elem = doc.FirstChild("ede-settings");
if(!elem)
return false;
for(elem = elem->FirstChildElement(); elem; elem = elem->NextSibling()) {
if(strcmp(elem->Value(), "setting") != 0) {
EWARNING(ESTRLOC ": Got unknown child in 'ede-setting' %s\n", elem->Value());
continue;
}
name = elem->ToElement()->Attribute("name");
if(!name) {
EWARNING(ESTRLOC ": Missing name key\n");
continue;
}
type = elem->ToElement()->Attribute("type");
if(!type) {
EWARNING(ESTRLOC ": Missing type key\n");
continue;
}
if(strcmp(type, "int") == 0)
cmp = 1;
else if(strcmp(type, "string") == 0)
cmp = 2;
else if(strcmp(type, "color") == 0)
cmp = 3;
else {
EWARNING(ESTRLOC ": Unknown type %s\n", type);
continue;
}
switch(cmp) {
case 1:
if(elem->ToElement()->QueryIntAttribute("value", &v_int) == TIXML_SUCCESS)
set(name, v_int);
else
EWARNING(ESTRLOC ": Unable to query integer value\n");
break;
case 2:
v_string = elem->ToElement()->Attribute("value");
if(v_string)
set(name, v_string);
break;
case 3:
if((elem->ToElement()->QueryIntAttribute("red", &v_red) == TIXML_SUCCESS) &&
(elem->ToElement()->QueryIntAttribute("green", &v_green) == TIXML_SUCCESS) &&
(elem->ToElement()->QueryIntAttribute("blue", &v_blue) == TIXML_SUCCESS) &&
(elem->ToElement()->QueryIntAttribute("alpha", &v_alpha) == TIXML_SUCCESS)) {
set(name, v_red, v_green, v_blue, v_alpha);
}
break;
default:
break;
}
}
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xresource_replace();
return true;
}
bool Xsm::save_serialized(const char* file) {
// FIXME: a lot of this code could be in edelib
Atom type;
int format;
unsigned long n_items, bytes_after;
unsigned char* data;
int result;
edelib::XSettingsList* settings = NULL, *iter = NULL;
int (*old_handler)(Display*, XErrorEvent*);
// possible ?
if(!manager_data->manager_win)
return false;
old_handler = XSetErrorHandler(ignore_xerrors);
result = XGetWindowProperty(manager_data->display, manager_data->manager_win, manager_data->xsettings_atom,
0, LONG_MAX, False, manager_data->xsettings_atom,
&type, &format, &n_items, &bytes_after, (unsigned char**)&data);
XSetErrorHandler(old_handler);
if(result == Success && type != None) {
if(type != manager_data->xsettings_atom)
EWARNING(ESTRLOC ": Invalid type for XSETTINGS property\n");
else if(format != 8)
EWARNING(ESTRLOC ": Invalid format for XSETTINGS property\n");
else
settings = edelib::xsettings_decode(data, n_items, NULL);
XFree(data);
}
if(!settings)
return false;
edelib::File setting_file;
if(!setting_file.open(file, edelib::FIO_WRITE)) {
EWARNING(ESTRLOC ": Unable to write to %s\n", file);
edelib::xsettings_list_free(settings);
return false;
}
setting_file.printf("<? xml version=\"1.0\" encoding=\"UTF-8\" ?>\n");
setting_file.printf("<ede-settings>\n");
iter = settings;
while(iter) {
setting_file.printf("\t<setting name=\"%s\" ", iter->setting->name);
switch(iter->setting->type) {
case edelib::XSETTINGS_TYPE_INT:
setting_file.printf("type=\"int\" value=\"%i\" />\n", iter->setting->data.v_int);
break;
case edelib::XSETTINGS_TYPE_STRING:
setting_file.printf("type=\"string\" value=\"%s\" />\n", iter->setting->data.v_string);
break;
case edelib::XSETTINGS_TYPE_COLOR:
setting_file.printf("type=\"color\" red=\"%i\" green=\"%i\" blue=\"%i\" alpha=\"%i\" />\n",
iter->setting->data.v_color.red,
iter->setting->data.v_color.green,
iter->setting->data.v_color.blue,
iter->setting->data.v_color.alpha);
break;
}
iter = iter->next;
}
setting_file.printf("</ede-settings>\n");
setting_file.close();
edelib::xsettings_list_free(settings);
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xresource_undo();
return true;
}