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/*
	Copyright 2013 bigbiff/Dees_Troy 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/>.
*/
// pages.cpp - Source to manage GUI base objects

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/reboot.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <time.h>
#include <unistd.h>
#include <stdlib.h>

#include <string>

extern "C" {
#include "../twcommon.h"
#include "../minuitwrp/minui.h"
}

#include "rapidxml.hpp"
#include "objects.hpp"
#include "blanktimer.hpp"

extern int gGuiRunning;
extern blanktimer blankTimer;

std::map<std::string, PageSet*> PageManager::mPageSets;
PageSet* PageManager::mCurrentSet;
PageSet* PageManager::mBaseSet = NULL;

// Helper routine to convert a string to a color declaration
int ConvertStrToColor(std::string str, COLOR* color)
{
	// Set the default, solid black
	memset(color, 0, sizeof(COLOR));
	color->alpha = 255;

	// Translate variables
	DataManager::GetValue(str, str);
	
	// Look for some defaults
	if (str == "black")			return 0;
	else if (str == "white")	{ color->red = color->green = color->blue = 255; return 0; }
	else if (str == "red")		{ color->red = 255; return 0; }
	else if (str == "green")	{ color->green = 255; return 0; }
	else if (str == "blue")		{ color->blue = 255; return 0; }

	// At this point, we require an RGB(A) color
	if (str[0] != '#')
		return -1;

	str.erase(0, 1);

	int result;
	if (str.size() >= 8) {
		// We have alpha channel
		string alpha = str.substr(6, 2);
		result = strtol(alpha.c_str(), NULL, 16);
		color->alpha = result & 0x000000FF;
		str.resize(6);
		result = strtol(str.c_str(), NULL, 16);
		color->red = (result >> 16) & 0x000000FF;
		color->green = (result >> 8) & 0x000000FF;
		color->blue = result & 0x000000FF;
	} else {
		result = strtol(str.c_str(), NULL, 16);
		color->red = (result >> 16) & 0x000000FF;
		color->green = (result >> 8) & 0x000000FF;
		color->blue = result & 0x000000FF;
	}
	return 0;
}

// Helper APIs
bool LoadPlacement(xml_node<>* node, int* x, int* y, int* w /* = NULL */, int* h /* = NULL */, RenderObject::Placement* placement /* = NULL */)
{
	if (!node)
		return false;

	std::string value;
	if (node->first_attribute("x"))
	{
		value = node->first_attribute("x")->value();
		DataManager::GetValue(value, value);
		*x = atol(value.c_str());
	}

	if (node->first_attribute("y"))
	{
		value = node->first_attribute("y")->value();
		DataManager::GetValue(value, value);
		*y = atol(value.c_str());
	}

	if (w && node->first_attribute("w"))
	{
		value = node->first_attribute("w")->value();
		DataManager::GetValue(value, value);
		*w = atol(value.c_str());
	}

	if (h && node->first_attribute("h"))
	{
		value = node->first_attribute("h")->value();
		DataManager::GetValue(value, value);
		*h = atol(value.c_str());
	}

	if (placement && node->first_attribute("placement"))
	{
		value = node->first_attribute("placement")->value();
		DataManager::GetValue(value, value);
		*placement = (RenderObject::Placement) atol(value.c_str());
	}

	return true;
}

int ActionObject::SetActionPos(int x, int y, int w, int h)
{
	if (x < 0 || y < 0)
		return -1;

	mActionX = x; 
	mActionY = y; 
	if (w || h)
	{
		mActionW = w;
		mActionH = h;
	}
	return 0;
}

Page::Page(xml_node<>* page, xml_node<>* templates /* = NULL */)
{
	mTouchStart = NULL;

	// We can memset the whole structure, because the alpha channel is ignored
	memset(&mBackground, 0, sizeof(COLOR));

	// With NULL, we make a console-only display
	if (!page)
	{
		mName = "console";

		GUIConsole* element = new GUIConsole(NULL);
		mRenders.push_back(element);
		mActions.push_back(element);
		return;
	}

	if (page->first_attribute("name"))
		mName = page->first_attribute("name")->value();
	else
	{
		LOGERR("No page name attribute found!\n");
		return;
	}

	LOGINFO("Loading page %s\n", mName.c_str());

	// This is a recursive routine for template handling
	ProcessNode(page, templates);

	return;
}

bool Page::ProcessNode(xml_node<>* page, xml_node<>* templates /* = NULL */, int depth /* = 0 */)
{
	if (depth == 10)
	{
		LOGERR("Page processing depth has exceeded 10. Failing out. This is likely a recursive template.\n");
		return false;
	}

	// Let's retrieve the background value, if any
	xml_node<>* bg = page->first_node("background");
	if (bg)
	{
		xml_attribute<>* attr = bg->first_attribute("color");
		if (attr)
		{
			std::string color = attr->value();
			ConvertStrToColor(color, &mBackground);
		}
	}

	xml_node<>* child;
	child = page->first_node("object");
	while (child)
	{
		if (!child->first_attribute("type"))
			break;

		std::string type = child->first_attribute("type")->value();

		if (type == "text")
		{
			GUIText* element = new GUIText(child);
			mRenders.push_back(element);
			mActions.push_back(element);
		}
		else if (type == "image")
		{
			GUIImage* element = new GUIImage(child);
			mRenders.push_back(element);
		}
		else if (type == "fill")
		{
			GUIFill* element = new GUIFill(child);
			mRenders.push_back(element);
		}
		else if (type == "action")
		{
			GUIAction* element = new GUIAction(child);
			mActions.push_back(element);
		}
		else if (type == "console")
		{
			GUIConsole* element = new GUIConsole(child);
			mRenders.push_back(element);
			mActions.push_back(element);
		}
		else if (type == "button")
		{
			GUIButton* element = new GUIButton(child);
			mRenders.push_back(element);
			mActions.push_back(element);
		}
		else if (type == "checkbox")
		{
			GUICheckbox* element = new GUICheckbox(child);
			mRenders.push_back(element);
			mActions.push_back(element);
		}
		else if (type == "fileselector")
		{
			GUIFileSelector* element = new GUIFileSelector(child);
			mRenders.push_back(element);
			mActions.push_back(element);
		}
		else if (type == "animation")
		{
			GUIAnimation* element = new GUIAnimation(child);
			mRenders.push_back(element);
		}
		else if (type == "progressbar")
		{
			GUIProgressBar* element = new GUIProgressBar(child);
			mRenders.push_back(element);
			mActions.push_back(element);
		}
		else if (type == "slider")
		{
			GUISlider* element = new GUISlider(child);
			mRenders.push_back(element);
			mActions.push_back(element);
		}
		else if (type == "slidervalue")
		{
			GUISliderValue *element = new GUISliderValue(child);
			mRenders.push_back(element);
			mActions.push_back(element);
		}
		else if (type == "listbox")
		{
			GUIListBox* element = new GUIListBox(child);
			mRenders.push_back(element);
			mActions.push_back(element);
		}
		else if (type == "keyboard")
		{
			GUIKeyboard* element = new GUIKeyboard(child);
			mRenders.push_back(element);
			mActions.push_back(element);
		}
		else if (type == "input")
		{
			GUIInput* element = new GUIInput(child);
			mRenders.push_back(element);
			mActions.push_back(element);
			mInputs.push_back(element);
		}
		else if (type == "partitionlist")
		{
			GUIPartitionList* element = new GUIPartitionList(child);
			mRenders.push_back(element);
			mActions.push_back(element);
		}
		else if (type == "template")
		{
			if (!templates || !child->first_attribute("name"))
			{
				LOGERR("Invalid template request.\n");
			}
			else
			{
				std::string name = child->first_attribute("name")->value();

				// We need to find the correct template
				xml_node<>* node;
				node = templates->first_node("template");

				while (node)
				{
					if (!node->first_attribute("name"))
						continue;

					if (name == node->first_attribute("name")->value())
					{
						if (!ProcessNode(node, templates, depth + 1))
							return false;
						else
							break;
					}
					node = node->next_sibling("template");
				}
			}
		}
		else
		{
			LOGERR("Unknown object type.\n");
		}
		child = child->next_sibling("object");
	}
	return true;
}

int Page::Render(void)
{
	// Render background
	gr_color(mBackground.red, mBackground.green, mBackground.blue, mBackground.alpha);
	gr_fill(0, 0, gr_fb_width(), gr_fb_height());

	// Render remaining objects
	std::vector<RenderObject*>::iterator iter;
	for (iter = mRenders.begin(); iter != mRenders.end(); iter++)
	{
		if ((*iter)->Render())
			LOGERR("A render request has failed.\n");
	}
	return 0;
}

int Page::Update(void)
{
	int retCode = 0;

	std::vector<RenderObject*>::iterator iter;
	for (iter = mRenders.begin(); iter != mRenders.end(); iter++)
	{
		int ret = (*iter)->Update();
		if (ret < 0)
			LOGERR("An update request has failed.\n");
		else if (ret > retCode)
			retCode = ret;
	}

	return retCode;
}

int Page::NotifyTouch(TOUCH_STATE state, int x, int y)
{
	// By default, return 1 to ignore further touches if nobody is listening
	int ret = 1;

	// Don't try to handle a lack of handlers
	if (mActions.size() == 0)
		return ret;

	// We record mTouchStart so we can pass all the touch stream to the same handler
	if (state == TOUCH_START)
	{
		std::vector<ActionObject*>::reverse_iterator iter;
		// We work backwards, from top-most element to bottom-most element
		for (iter = mActions.rbegin(); iter != mActions.rend(); iter++)
		{
			if ((*iter)->IsInRegion(x, y))
			{
				mTouchStart = (*iter);
				ret = mTouchStart->NotifyTouch(state, x, y);
				if (ret >= 0)
					break;
				mTouchStart = NULL;
			}
		}
	}
	else if (state == TOUCH_RELEASE && mTouchStart != NULL)
	{
		ret = mTouchStart->NotifyTouch(state, x, y);
		mTouchStart = NULL;
	}
	else if ((state == TOUCH_DRAG || state == TOUCH_HOLD || state == TOUCH_REPEAT) && mTouchStart != NULL)
	{
		ret = mTouchStart->NotifyTouch(state, x, y);
	}
	return ret;
}

int Page::NotifyKey(int key)
{
	std::vector<ActionObject*>::reverse_iterator iter;

	// Don't try to handle a lack of handlers
	if (mActions.size() == 0)
		return 1;

	// We work backwards, from top-most element to bottom-most element
	for (iter = mActions.rbegin(); iter != mActions.rend(); iter++)
	{
		int ret = (*iter)->NotifyKey(key);
		if (ret == 0)
			return 0;
		else if (ret < 0)
			LOGERR("An action handler has returned an error");
	}
	return 1;
}

int Page::NotifyKeyboard(int key)
{
	std::vector<InputObject*>::reverse_iterator iter;

	// Don't try to handle a lack of handlers
	if (mInputs.size() == 0)
		return 1;

	// We work backwards, from top-most element to bottom-most element
	for (iter = mInputs.rbegin(); iter != mInputs.rend(); iter++)
	{
		int ret = (*iter)->NotifyKeyboard(key);
		if (ret == 0)
			return 0;
		else if (ret < 0)
			LOGERR("A keyboard handler has returned an error");
	}
	return 1;
}

int Page::SetKeyBoardFocus(int inFocus)
{
	std::vector<InputObject*>::reverse_iterator iter;

	// Don't try to handle a lack of handlers
	if (mInputs.size() == 0)
		return 1;

	// We work backwards, from top-most element to bottom-most element
	for (iter = mInputs.rbegin(); iter != mInputs.rend(); iter++)
	{
		int ret = (*iter)->SetInputFocus(inFocus);
		if (ret == 0)
			return 0;
		else if (ret < 0)
			LOGERR("An input focus handler has returned an error");
	}
	return 1;
}

void Page::SetPageFocus(int inFocus)
{
	// Render remaining objects
	std::vector<RenderObject*>::iterator iter;
	for (iter = mRenders.begin(); iter != mRenders.end(); iter++)
		(*iter)->SetPageFocus(inFocus);

	return;
}

int Page::NotifyVarChange(std::string varName, std::string value)
{
	std::vector<ActionObject*>::iterator iter;

	// Don't try to handle a lack of handlers
	if (mActions.size() == 0)
		return 1;

	for (iter = mActions.begin(); iter != mActions.end(); ++iter)
	{
		if ((*iter)->NotifyVarChange(varName, value))
			LOGERR("An action handler errored on NotifyVarChange.\n");
	}
	return 0;
}

PageSet::PageSet(char* xmlFile)
{
	mResources = NULL;
	mCurrentPage = NULL;
	mOverlayPage = NULL;

	mXmlFile = xmlFile;
	if (xmlFile)
		mDoc.parse<0>(mXmlFile);
	else
		mCurrentPage = new Page(NULL);
}

PageSet::~PageSet()
{
	delete mResources;
	free(mXmlFile);
}

int PageSet::Load(ZipArchive* package)
{
	xml_node<>* parent;
	xml_node<>* child;
	xml_node<>* templates;
 
	parent = mDoc.first_node("recovery");
	if (!parent)
		parent = mDoc.first_node("install");

	// Now, let's parse the XML
	LOGINFO("Loading resources...\n");
	child = parent->first_node("resources");
	if (child)
		mResources = new ResourceManager(child, package);

	LOGINFO("Loading variables...\n");
	child = parent->first_node("variables");
	if (child)
		LoadVariables(child);

	LOGINFO("Loading pages...\n");
	// This may be NULL if no templates are present
	templates = parent->first_node("templates");

	child = parent->first_node("pages");
	if (!child)
		return -1;

	return LoadPages(child, templates);
}

int PageSet::SetPage(std::string page)
{
	Page* tmp = FindPage(page);
	if (tmp)
	{
		if (mCurrentPage)   mCurrentPage->SetPageFocus(0);
		mCurrentPage = tmp;
		mCurrentPage->SetPageFocus(1);
		mCurrentPage->NotifyVarChange("", "");
		return 0;
	}
	else
	{
		LOGERR("Unable to locate page (%s)\n", page.c_str());
	}
	return -1;
}

int PageSet::SetOverlay(Page* page)
{
	if (mOverlayPage)   mOverlayPage->SetPageFocus(0);
	mOverlayPage = page;
	if (mOverlayPage)
	{
		mOverlayPage->SetPageFocus(1);
		mOverlayPage->NotifyVarChange("", "");
	}
	return 0;
}

Resource* PageSet::FindResource(std::string name)
{
	return mResources ? mResources->FindResource(name) : NULL;
}

Page* PageSet::FindPage(std::string name)
{
	std::vector<Page*>::iterator iter;

	for (iter = mPages.begin(); iter != mPages.end(); iter++)
	{
		if (name == (*iter)->GetName())
			return (*iter);
	}
	return NULL;
}

int PageSet::LoadVariables(xml_node<>* vars)
{
	xml_node<>* child;

	child = vars->first_node("variable");
	while (child)
	{
		if (!child->first_attribute("name"))
			break;
		if (!child->first_attribute("value"))
			break;

		DataManager::SetValue(child->first_attribute("name")->value(), child->first_attribute("value")->value());
		child = child->next_sibling("variable");
	}
	return 0;
}

int PageSet::LoadPages(xml_node<>* pages, xml_node<>* templates /* = NULL */)
{
	xml_node<>* child;

	if (!pages)
		return -1;

	child = pages->first_node("page");
	while (child != NULL)
	{
		Page* page = new Page(child, templates);
		if (page->GetName().empty())
		{
			LOGERR("Unable to process load page\n");
			delete page;
		}
		else
		{
			mPages.push_back(page);
		}
		child = child->next_sibling("page");
	}
	if (mPages.size() > 0)
		return 0;
	return -1;
}

int PageSet::IsCurrentPage(Page* page)
{
	return ((mCurrentPage && mCurrentPage == page) ? 1 : 0);
}

int PageSet::Render(void)
{
	int ret;

	ret = (mCurrentPage ? mCurrentPage->Render() : -1);
	if (ret < 0)
		return ret;
	ret = (mOverlayPage ? mOverlayPage->Render() : -1);
	return ret;
}

int PageSet::Update(void)
{
	int ret;

	ret = (mCurrentPage ? mCurrentPage->Update() : -1);
	if (ret < 0 || ret > 1)
		return ret;
	ret = (mOverlayPage ? mOverlayPage->Update() : -1);
	return ret;
}

int PageSet::NotifyTouch(TOUCH_STATE state, int x, int y)
{
	if (mOverlayPage)
		return (mOverlayPage->NotifyTouch(state, x, y));

	return (mCurrentPage ? mCurrentPage->NotifyTouch(state, x, y) : -1);
}

int PageSet::NotifyKey(int key)
{
	if (mOverlayPage)
		return (mOverlayPage->NotifyKey(key));

	return (mCurrentPage ? mCurrentPage->NotifyKey(key) : -1);
}

int PageSet::NotifyKeyboard(int key)
{
	if (mOverlayPage)
		return (mOverlayPage->NotifyKeyboard(key));

	return (mCurrentPage ? mCurrentPage->NotifyKeyboard(key) : -1);
}

int PageSet::SetKeyBoardFocus(int inFocus)
{
	if (mOverlayPage)
		return (mOverlayPage->SetKeyBoardFocus(inFocus));

	return (mCurrentPage ? mCurrentPage->SetKeyBoardFocus(inFocus) : -1);
}

int PageSet::NotifyVarChange(std::string varName, std::string value)
{
	if (mOverlayPage)
		mOverlayPage->NotifyVarChange(varName, value);

	return (mCurrentPage ? mCurrentPage->NotifyVarChange(varName, value) : -1);
}

int PageManager::LoadPackage(std::string name, std::string package, std::string startpage)
{
	int fd;
	ZipArchive zip, *pZip = NULL;
	long len;
	char* xmlFile = NULL;
	PageSet* pageSet = NULL;
	int ret;

	// Open the XML file
	LOGINFO("Loading package: %s (%s)\n", name.c_str(), package.c_str());
	if (mzOpenZipArchive(package.c_str(), &zip))
	{
		// We can try to load the XML directly...
		struct stat st;
		if(stat(package.c_str(),&st) != 0)
			return -1;

		len = st.st_size;
		xmlFile = (char*) malloc(len + 1);
		if (!xmlFile)
			return -1;

		fd = open(package.c_str(), O_RDONLY);
		if (fd == -1)
			goto error;

		read(fd, xmlFile, len);
		close(fd);
	}
	else
	{
		pZip = &zip;
		const ZipEntry* ui_xml = mzFindZipEntry(&zip, "ui.xml");
		if (ui_xml == NULL)
		{
			LOGERR("Unable to locate ui.xml in zip file\n");
			goto error;
		}
	
		// Allocate the buffer for the file
		len = mzGetZipEntryUncompLen(ui_xml);
		xmlFile = (char*) malloc(len + 1);
		if (!xmlFile)
			goto error;
	
		if (!mzExtractZipEntryToBuffer(&zip, ui_xml, (unsigned char*) xmlFile))
		{
			LOGERR("Unable to extract ui.xml\n");
			goto error;
		}
	}

	// NULL-terminate the string
	xmlFile[len] = 0x00;

	// Before loading, mCurrentSet must be the loading package so we can find resources
	pageSet = mCurrentSet;
	mCurrentSet = new PageSet(xmlFile);

	ret = mCurrentSet->Load(pZip);
	if (ret == 0)
	{
		mCurrentSet->SetPage(startpage);
		mPageSets.insert(std::pair<std::string, PageSet*>(name, mCurrentSet));
	}
	else
	{
		LOGERR("Package %s failed to load.\n", name.c_str());
	}
	
	// The first successful package we loaded is the base
	if (mBaseSet == NULL)
		mBaseSet = mCurrentSet;

	mCurrentSet = pageSet;

	if (pZip)
		mzCloseZipArchive(pZip);
	return ret;

error:
	LOGERR("An internal error has occurred.\n");
	if (pZip)
		mzCloseZipArchive(pZip);
	if (xmlFile)
		free(xmlFile);
	return -1;
}

PageSet* PageManager::FindPackage(std::string name)
{
	std::map<std::string, PageSet*>::iterator iter;

	iter = mPageSets.find(name);
	if (iter != mPageSets.end())
		return (*iter).second;

	LOGERR("Unable to locate package %s\n", name.c_str());
	return NULL;
}

PageSet* PageManager::SelectPackage(std::string name)
{
	LOGINFO("Switching packages (%s)\n", name.c_str());
	PageSet* tmp;

	tmp = FindPackage(name);
	if (tmp)
		mCurrentSet = tmp;
	else
		LOGERR("Unable to find package.\n");

	return mCurrentSet;
}

int PageManager::ReloadPackage(std::string name, std::string package)
{
	std::map<std::string, PageSet*>::iterator iter;

	iter = mPageSets.find(name);
	if (iter == mPageSets.end())
		return -1;

	PageSet* set = (*iter).second;
	mPageSets.erase(iter);

	if (LoadPackage(name, package, "main") != 0)
	{
		LOGERR("Failed to load package.\n");
		mPageSets.insert(std::pair<std::string, PageSet*>(name, set));
		return -1;
	}
	if (mCurrentSet == set)
		SelectPackage(name);
	delete set;
	return 0;
}

void PageManager::ReleasePackage(std::string name)
{
	std::map<std::string, PageSet*>::iterator iter;

	iter = mPageSets.find(name);
	if (iter == mPageSets.end())
		return;

	PageSet* set = (*iter).second;
	mPageSets.erase(iter);
	delete set;
	return;
}

int PageManager::ChangePage(std::string name)
{
	DataManager::SetValue("tw_operation_state", 0);
	int ret = (mCurrentSet ? mCurrentSet->SetPage(name) : -1);
	return ret;
}

int PageManager::ChangeOverlay(std::string name)
{
	if (name.empty())
		return mCurrentSet->SetOverlay(NULL);
	else
	{
		Page* page = mBaseSet ? mBaseSet->FindPage(name) : NULL;
		return mCurrentSet->SetOverlay(page);
	}
}

Resource* PageManager::FindResource(std::string name)
{
	return (mCurrentSet ? mCurrentSet->FindResource(name) : NULL);
}

Resource* PageManager::FindResource(std::string package, std::string name)
{
	PageSet* tmp;

	tmp = FindPackage(name);
	return (tmp ? tmp->FindResource(name) : NULL);
}

int PageManager::SwitchToConsole(void)
{
	PageSet* console = new PageSet(NULL);

	mCurrentSet = console;
	return 0;
}

int PageManager::IsCurrentPage(Page* page)
{
	return (mCurrentSet ? mCurrentSet->IsCurrentPage(page) : 0);
}

int PageManager::Render(void)
{
	return (mCurrentSet ? mCurrentSet->Render() : -1);
}

int PageManager::Update(void)
{
	if(blankTimer.IsScreenOff())
		return 0;

	return (mCurrentSet ? mCurrentSet->Update() : -1);
}

int PageManager::NotifyTouch(TOUCH_STATE state, int x, int y)
{
	return (mCurrentSet ? mCurrentSet->NotifyTouch(state, x, y) : -1);
}

int PageManager::NotifyKey(int key)
{
	return (mCurrentSet ? mCurrentSet->NotifyKey(key) : -1);
}

int PageManager::NotifyKeyboard(int key)
{
	return (mCurrentSet ? mCurrentSet->NotifyKeyboard(key) : -1);
}

int PageManager::SetKeyBoardFocus(int inFocus)
{
	return (mCurrentSet ? mCurrentSet->SetKeyBoardFocus(inFocus) : -1);
}

int PageManager::NotifyVarChange(std::string varName, std::string value)
{
	return (mCurrentSet ? mCurrentSet->NotifyVarChange(varName, value) : -1);
}

extern "C" void gui_notifyVarChange(const char *name, const char* value)
{
	if (!gGuiRunning)
		return;

	PageManager::NotifyVarChange(name, value);
}