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Location: cpp/openttd-patchpack/source/src/story.cpp - annotation

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/* $Id$ */

/*
 * This file is part of OpenTTD.
 * OpenTTD 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, version 2.
 * OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file story.cpp Handling of stories. */

#include "stdafx.h"
#include "story_base.h"
#include "core/pool_func.hpp"
#include "cmd_helper.h"
#include "command_func.h"
#include "company_base.h"
#include "company_func.h"
#include "string_func.h"
#include "date_func.h"
#include "tile_map.h"
#include "goal_type.h"
#include "goal_base.h"
#include "window_func.h"
#include "gui.h"


StoryPageElementID _new_story_page_element_id;
StoryPageID _new_story_page_id;
uint32 _story_page_element_next_sort_value;
uint32 _story_page_next_sort_value;

StoryPageElementPool _story_page_element_pool("StoryPageElement");
StoryPagePool _story_page_pool("StoryPage");
INSTANTIATE_POOL_METHODS(StoryPageElement)
INSTANTIATE_POOL_METHODS(StoryPage)

/**
 * This helper for Create/Update PageElement Cmd procedure verifies if the page
 * element parameters are correct for the given page element type.
 * @param page_id The page id of the page which the page element (will) belong to
 * @param type The type of the page element to create/update
 * @param tile The tile parameter of the DoCommand proc
 * @param reference The reference parameter of the DoCommand proc (p2)
 * @param text The text parameter of the DoCommand proc
 * @return true, if and only if the given parameters are valid for the given page elment type and page id.
 */
static bool VerifyElementContentParameters(StoryPageID page_id, StoryPageElementType type, TileIndex tile, uint32 reference, const char *text)
{
	switch (type) {
		case SPET_TEXT:
			if (StrEmpty(text)) return false;
			break;
		case SPET_LOCATION:
			if (StrEmpty(text)) return false;
			if (!IsValidTile(tile)) return false;
			break;
		case SPET_GOAL:
			if (!Goal::IsValidID((GoalID)reference)) return false;
			/* Reject company specific goals on global pages */
			if (StoryPage::Get(page_id)->company == INVALID_COMPANY && Goal::Get((GoalID)reference)->company != INVALID_COMPANY) return false;
			break;
		default:
			return false;
	}

	return true;
}

/**
 * This helper for Create/Update PageElement Cmd procedure updates a page
 * element with new content data.
 * @param pe The page element to update
 * @param tile The tile parameter of the DoCommand proc
 * @param reference The reference parameter of the DoCommand proc (p2)
 * @param text The text parameter of the DoCommand proc
 */
static void UpdateElement(StoryPageElement &pe, TileIndex tile, uint32 reference, const char *text)
{
	switch (pe.type) {
		case SPET_TEXT:
			pe.text = strdup(text);
			break;
		case SPET_LOCATION:
			pe.text = strdup(text);
			pe.referenced_id = tile;
			break;
		case SPET_GOAL:
			pe.referenced_id = (GoalID)reference;
			break;
		default: NOT_REACHED();
	}
}

/**
 * Create a new story page.
 * @param tile unused.
 * @param flags type of operation
 * @param p1 various bitstuffed elements
 * - p1 = (bit  0 -  7) - Company for which this story page belongs to.
 * @param p2 unused.
 * @param text Title of the story page. Null is allowed in wich case a generic page title is provided by OpenTTD.
 * @return the cost of this operation or an error
 */
CommandCost CmdCreateStoryPage(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	if (!StoryPage::CanAllocateItem()) return CMD_ERROR;

	CompanyID company = (CompanyID)GB(p1, 0, 8);

	if (_current_company != OWNER_DEITY) return CMD_ERROR;
	if (company != INVALID_COMPANY && !Company::IsValidID(company)) return CMD_ERROR;

	if (flags & DC_EXEC) {
		if (_story_page_pool.items == 0) {
			/* Initialize the next sort value variable. */
			_story_page_next_sort_value = 0;
		}

		StoryPage *s = new StoryPage();
		s->sort_value = _story_page_next_sort_value;
		s->date = _date;
		s->company = company;
		if (StrEmpty(text)) {
			s->title = NULL;
		} else {
			s->title = strdup(text);
		}

		InvalidateWindowClassesData(WC_STORY_BOOK, -1);

		_new_story_page_id = s->index;
		_story_page_next_sort_value++;
	}

	return CommandCost();
}

/**
 * Create a new story page element.
 * @param tile Tile location if it is a location page element, otherwise unused.
 * @param flags type of operation
 * @param p1 various bitstuffed elements
 * - p1 = (bit  0 -  15) - The page which the element belongs to.
 *        (bit  16 -  23) - Page element type
 * @param p2 Id of referenced object
 * @param text Text content in case it is a text or location page element
 * @return the cost of this operation or an error
 */
CommandCost CmdCreateStoryPageElement(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	if (!StoryPageElement::CanAllocateItem()) return CMD_ERROR;

	StoryPageID page_id = (CompanyID)GB(p1, 0, 16);
	StoryPageElementType type = Extract<StoryPageElementType, 16, 8>(p1);

	/* Allow at most 128 elements per page. */
	uint16 element_count = 0;
	StoryPageElement *iter;
	FOR_ALL_STORY_PAGE_ELEMENTS(iter) {
		if (iter->page == page_id) element_count++;
	}
	if (element_count >= 128) return CMD_ERROR;

	if (_current_company != OWNER_DEITY) return CMD_ERROR;
	if (!StoryPage::IsValidID(page_id)) return CMD_ERROR;
	if (!VerifyElementContentParameters(page_id, type, tile, p2, text)) return CMD_ERROR;

	if (flags & DC_EXEC) {
		if (_story_page_element_pool.items == 0) {
			/* Initialize the next sort value variable. */
			_story_page_element_next_sort_value = 0;
		}

		StoryPageElement *pe = new StoryPageElement();
		pe->sort_value = _story_page_element_next_sort_value;
		pe->type = type;
		pe->page = page_id;
		UpdateElement(*pe, tile, p2, text);

		InvalidateWindowClassesData(WC_STORY_BOOK, page_id);

		_new_story_page_element_id = pe->index;
		_story_page_element_next_sort_value++;
	}

	return CommandCost();
}

/**
 * Update a new story page element.
 * @param tile Tile location if it is a location page element, otherwise unused.
 * @param flags type of operation
 * @param p1 various bitstuffed elements
 * - p1 = (bit  0 -  15) - The page element to update.
 *        (bit  16 -  31) - unused
 * @param p2 Id of referenced object
 * @param text Text content in case it is a text or location page element
 * @return the cost of this operation or an error
 */
CommandCost CmdUpdateStoryPageElement(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	StoryPageElementID page_element_id = (StoryPageElementID)GB(p1, 0, 16);

	if (_current_company != OWNER_DEITY) return CMD_ERROR;
	if (!StoryPageElement::IsValidID(page_element_id)) return CMD_ERROR;

	StoryPageElement *pe = StoryPageElement::Get(page_element_id);
	StoryPageID page_id = pe->page;
	StoryPageElementType type = pe->type;

	if (!VerifyElementContentParameters(page_id, type, tile, p2, text)) return CMD_ERROR;

	if (flags & DC_EXEC) {
		UpdateElement(*pe, tile, p2, text);
		InvalidateWindowClassesData(WC_STORY_BOOK, pe->page);
	}

	return CommandCost();
}

/**
 * Update title of a story page.
 * @param tile unused.
 * @param flags type of operation
 * @param p1 = (bit 0 - 15) - StoryPageID to update.
 * @param p2 unused
 * @param text title text of the story page.
 * @return the cost of this operation or an error
 */
CommandCost CmdSetStoryPageTitle(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	if (_current_company != OWNER_DEITY) return CMD_ERROR;
	StoryPageID page_id = (StoryPageID)GB(p1, 0, 16);
	if (!StoryPage::IsValidID(page_id)) return CMD_ERROR;

	if (flags & DC_EXEC) {
		StoryPage *p = StoryPage::Get(page_id);
		free(p->title);
		if (StrEmpty(text)) {
			p->title = NULL;
		} else {
			p->title = strdup(text);
		}

		InvalidateWindowClassesData(WC_STORY_BOOK, page_id);
	}

	return CommandCost();
}

/**
 * Display a story page for all clients that are allowed to
 * view the story page.
 * @param tile unused.
 * @param flags type of operation
 * @param p1 = (bit 0 - 15) - StoryPageID to show.
 * @param p2 unused
 * @param text unused
 * @return the cost of this operation or an error
 */
CommandCost CmdShowStoryPage(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	if (_current_company != OWNER_DEITY) return CMD_ERROR;
	StoryPageID page_id = (StoryPageID)GB(p1, 0, 16);
	if (!StoryPage::IsValidID(page_id)) return CMD_ERROR;

	if (flags & DC_EXEC) {
		StoryPage *g = StoryPage::Get(page_id);
		if ((g->company != INVALID_COMPANY && g->company == _local_company) || (g->company == INVALID_COMPANY && Company::IsValidID(_local_company))) ShowStoryBook(_local_company, page_id);
	}

	return CommandCost();
}
/**
 * Remove a story page and associated story page elements.
 * @param tile unused.
 * @param flags type of operation
 * @param p1 = (bit 0 - 15) - StoryPageID to remove.
 * @param p2 unused.
 * @param text unused.
 * @return the cost of this operation or an error
 */
CommandCost CmdRemoveStoryPage(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	if (_current_company != OWNER_DEITY) return CMD_ERROR;
	StoryPageID page_id = (StoryPageID)p1;
	if (!StoryPage::IsValidID(page_id)) return CMD_ERROR;

	if (flags & DC_EXEC) {
		StoryPage *p = StoryPage::Get(page_id);

		StoryPageElement *pe;
		FOR_ALL_STORY_PAGE_ELEMENTS(pe) {
			if (pe->page == p->index) {
				delete pe;
			}
		}

		delete p;

		InvalidateWindowClassesData(WC_STORY_BOOK, -1);
	}

	return CommandCost();
}