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/*
Copyright 2017 TeamWin
This file is part of TWRP/TeamWin Recovery Project.
TWRP 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.
TWRP 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 TWRP. If not, see <http://www.gnu.org/licenses/>.
*/
// object.cpp - GUIObject base class
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <string>
extern "C" {
#include "../twcommon.h"
#include "../variables.h"
}
#include "rapidxml.hpp"
#include "objects.hpp"
#include "../data.hpp"
GUIObject::GUIObject(xml_node<>* node)
{
mConditionsResult = true;
if (node)
LoadConditions(node, mConditions);
}
void GUIObject::LoadConditions(xml_node<>* node, std::vector<Condition>& conditions)
{
xml_node<>* condition = FindNode(node, "conditions");
if (condition) condition = FindNode(condition, "condition");
else condition = FindNode(node, "condition");
while (condition)
{
Condition cond;
cond.mCompareOp = "=";
xml_attribute<>* attr;
attr = condition->first_attribute("var1");
if (attr) cond.mVar1 = attr->value();
attr = condition->first_attribute("op");
if (attr) cond.mCompareOp = attr->value();
attr = condition->first_attribute("var2");
if (attr) cond.mVar2 = attr->value();
conditions.push_back(cond);
condition = condition->next_sibling("condition");
}
}
GUIObject::~GUIObject()
{
}
bool GUIObject::IsConditionVariable(std::string var)
{
std::vector<Condition>::iterator iter;
for (iter = mConditions.begin(); iter != mConditions.end(); iter++)
{
if (iter->mVar1 == var)
return true;
}
return false;
}
bool GUIObject::isConditionTrue()
{
return mConditionsResult;
}
bool GUIObject::isConditionTrue(Condition* condition)
{
// This is used to hold the proper value of "true" based on the '!' NOT flag
bool bTrue = true;
if (condition->mVar1.empty())
return bTrue;
if (!condition->mCompareOp.empty() && condition->mCompareOp[0] == '!')
bTrue = false;
if (condition->mVar2.empty() && condition->mCompareOp != "modified")
{
if (!DataManager::GetStrValue(condition->mVar1).empty())
return bTrue;
return !bTrue;
}
string var1, var2;
if (DataManager::GetValue(condition->mVar1, var1))
var1 = condition->mVar1;
if (DataManager::GetValue(condition->mVar2, var2))
var2 = condition->mVar2;
if (var2.substr(0, 2) == "{@")
// translate resource string in value
var2 = gui_parse_text(var2);
// This is a special case, we stat the file and that determines our result
if (var1 == "fileexists")
{
struct stat st;
if (stat(var2.c_str(), &st) == 0)
var2 = var1;
else
var2 = "FAILED";
}
if (var1 == "mounted")
{
if (isMounted(condition->mVar2))
var2 = var1;
else
var2 = "FAILED";
}
if (condition->mCompareOp.find('=') != string::npos && var1 == var2)
return bTrue;
if (condition->mCompareOp.find('>') != string::npos && (atof(var1.c_str()) > atof(var2.c_str())))
return bTrue;
if (condition->mCompareOp.find('<') != string::npos && (atof(var1.c_str()) < atof(var2.c_str())))
return bTrue;
if (condition->mCompareOp == "modified")
{
// This is a hack to allow areas to reset the default value
if (var1.empty())
{
condition->mLastVal = var1;
return !bTrue;
}
if (var1 != condition->mLastVal)
return bTrue;
}
return !bTrue;
}
bool GUIObject::isConditionValid()
{
return !mConditions.empty();
}
int GUIObject::NotifyVarChange(const std::string& varName, const std::string& value __unused)
{
mConditionsResult = UpdateConditions(mConditions, varName);
return 0;
}
bool GUIObject::UpdateConditions(std::vector<Condition>& conditions, const std::string& varName)
{
bool result = true;
const bool varNameEmpty = varName.empty();
std::vector<Condition>::iterator iter;
for (iter = conditions.begin(); iter != conditions.end(); ++iter)
{
if (varNameEmpty && iter->mCompareOp == "modified")
{
string val;
// If this fails, val will not be set, which is perfect
if (DataManager::GetValue(iter->mVar1, val))
{
DataManager::SetValue(iter->mVar1, "");
DataManager::GetValue(iter->mVar1, val);
}
iter->mLastVal = val;
}
if (varNameEmpty || iter->mVar1 == varName || iter->mVar2 == varName)
iter->mLastResult = isConditionTrue(&(*iter));
if (!iter->mLastResult)
result = false;
}
return result;
}
bool GUIObject::isMounted(string vol)
{
FILE *fp;
char tmpOutput[255];
fp = fopen("/proc/mounts", "rt");
while (fgets(tmpOutput,255,fp) != NULL)
{
char* mnt = tmpOutput;
while (*mnt > 32) mnt++;
while (*mnt > 0 && *mnt <= 32) mnt++;
char* pos = mnt;
while (*pos > 32) pos++;
*pos = 0;
if (vol == mnt)
{
fclose(fp);
return true;
}
}
fclose(fp);
return false;
}
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