From 26ff8dcc8f4928a774a490f98d8540f6c543fa70 Mon Sep 17 00:00:00 2001
From: Kayne Ruse <ratstail91@yahoo.com.au>
Date: Thu, 3 Oct 2013 23:04:16 +1000
Subject: [PATCH] Created RegionPager

---
 editor/region_pager.cpp | 55 +++++++++++++++++++++++++++++++++++++++++
 editor/region_pager.hpp | 36 +++++++++++++++++++++++++++
 2 files changed, 91 insertions(+)
 create mode 100644 editor/region_pager.cpp
 create mode 100644 editor/region_pager.hpp

diff --git a/editor/region_pager.cpp b/editor/region_pager.cpp
new file mode 100644
index 0000000..335b015
--- /dev/null
+++ b/editor/region_pager.cpp
@@ -0,0 +1,55 @@
+#include "region_pager.hpp"
+
+#include <stdexcept>
+
+RegionPager::RegionPager() {
+	//
+}
+
+RegionPager::~RegionPager() {
+	if (onDelete) {
+		for (auto& i : regionList) {
+			onDelete(&i);
+		}
+	}
+}
+
+Region* RegionPager::NewRegion(int x, int y) {
+	for (auto& i : regionList) {
+		if (i.GetX() == x && i.GetY() == y) {
+			throw(std::runtime_error("Duplicate Regions detected"));
+		}
+	}
+
+	regionList.push_front({x, y, regionWidth, regionHeight});
+	if (onNew) {
+		onNew(&regionList.front());
+	}
+	return &regionList.front();
+}
+
+Region* RegionPager::GetRegion(int x, int y) {
+	for (auto& i : regionList) {
+		if (i.GetX() == x && i.GetY() == y) {
+			return &i;
+		}
+	}
+	//create, insert and return
+	regionList.push_front({x, y, regionWidth, regionHeight});
+	if (onNew) {
+		onNew(&regionList.front());
+	}
+	return &regionList.front();
+}
+
+void RegionPager::DeleteRegion(int x, int y) {
+	for (std::list<Region>::iterator i = regionList.begin(); i != regionList.end(); i++) {
+		if (i->GetX() == x && i->GetY() == y) {
+			if (onDelete) {
+				onDelete(&(*i));
+			}
+			regionList.erase(i);
+			break;
+		}
+	}
+}
diff --git a/editor/region_pager.hpp b/editor/region_pager.hpp
new file mode 100644
index 0000000..f001897
--- /dev/null
+++ b/editor/region_pager.hpp
@@ -0,0 +1,36 @@
+#ifndef REGIONPAGER_HPP_
+#define REGIONPAGER_HPP_
+
+#include "region.hpp"
+
+#include <list>
+
+class RegionPager {
+public:
+	RegionPager();
+	~RegionPager();
+
+	//these parameters MUST be multiples of the width & height
+	Region* NewRegion(int x, int y);
+	Region* GetRegion(int x, int y);
+	void DeleteRegion(int x, int y);
+
+	void SetOnDelete(void(*f)(Region* const)) { onDelete = f; }
+	void SetOnNew(void(*f)(Region* const)) { onNew = f; }
+
+	//accessors and mutators
+	int SetWidth(int i) { return regionWidth = i; }
+	int SetHeight(int i) { return regionHeight = i; }
+
+	int GetWidth() const { return regionWidth; }
+	int GetHeight() const { return regionHeight; }
+
+	std::list<Region>* GetRegions() { return &regionList; }
+private:
+	std::list<Region> regionList;
+	int regionWidth = 0, regionHeight = 0;
+	void (*onDelete)(Region* const) = nullptr;
+	void (*onNew)(Region* const) = nullptr;
+};
+
+#endif