Kayne Ruse
137 lines
3.3 KiB
C++
137 lines
3.3 KiB
C++
/* Copyright: (c) Kayne Ruse 2014
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source
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* distribution.
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*/
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#ifndef REGIONPAGER_HPP_
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#define REGIONPAGER_HPP_
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#include "region.hpp"
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#include "utility.hpp"
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#include <list>
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class RegionPagerBase {
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public:
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RegionPagerBase() {};
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virtual ~RegionPagerBase() {};
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//tile manipulation
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Region::type_t SetTile(int x, int y, int z, Region::type_t v);
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Region::type_t GetTile(int x, int y, int z);
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//region manipulation
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Region* GetRegion(int x, int y);
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Region* FindRegion(int x, int y);
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Region* PushRegion(Region*);
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//interface
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virtual Region* LoadRegion(int x, int y) = 0;
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virtual Region* SaveRegion(int x, int y) = 0;
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virtual Region* CreateRegion(int x, int y) = 0;
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virtual void UnloadRegion(int x, int y) = 0;
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//TODO: delete existing regions
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//accessors & mutators
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std::list<Region*>* GetContainer() { return ®ionList; }
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protected:
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std::list<Region*> regionList;
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};
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template<typename Allocator, typename FileFormat>
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class RegionPager : public RegionPagerBase {
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public:
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RegionPager() {};
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~RegionPager() {
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UnloadAll();
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}
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Region* LoadRegion(int x, int y) {
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//snap the coords
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x = snapToBase(REGION_WIDTH, x);
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y = snapToBase(REGION_HEIGHT, y);
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//load the region if possible
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Region* ptr = nullptr;
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format.Load(&ptr, x, y);
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if (ptr) {
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return PushRegion(ptr);
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}
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return nullptr;
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}
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Region* SaveRegion(int x, int y) {
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//snap the coords
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x = snapToBase(REGION_WIDTH, x);
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y = snapToBase(REGION_HEIGHT, y);
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//find & save the region
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Region* ptr = FindRegion(x, y);
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if (ptr) {
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format.Save(ptr);
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}
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return ptr;
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}
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Region* CreateRegion(int x, int y) {
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//snap the coords
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x = snapToBase(REGION_WIDTH, x);
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y = snapToBase(REGION_HEIGHT, y);
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//create and push the object
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Region* ptr = nullptr;
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allocator.Create(&ptr, x, y);
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return PushRegion(ptr);
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}
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void UnloadRegion(int x, int y) {
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//snap the coords
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x = snapToBase(REGION_WIDTH, x);
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y = snapToBase(REGION_HEIGHT, y);
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//custom loop
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for (std::list<Region*>::iterator it = regionList.begin(); it != regionList.end(); /* EMPTY */) {
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if ((*it)->GetX() == x && (*it)->GetY() == y) {
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allocator.Unload(*it);
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regionList.erase(it);
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//reset the loop, because of reasons
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it = regionList.begin();
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continue;
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}
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++it;
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}
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}
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void UnloadAll() {
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for (auto& it : regionList) {
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allocator.Unload(it);
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}
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regionList.clear();
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}
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//accessors
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Allocator* GetAllocator() { return &allocator; }
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FileFormat* GetFormat() { return &format; }
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protected:
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Allocator allocator;
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FileFormat format;
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};
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#endif
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