/*

Miranda NG: the free IM client for Microsoft* Windows*

Copyright (C) 2012-20 Miranda NG team (https://miranda-ng.org),
Copyright (c) 2000-03 Miranda ICQ/IM project,
all portions of this codebase are copyrighted to the people
listed in contributors.txt.

This program 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 2
of the License, or (at your option) any later version.

This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

#include "stdafx.h"
#include "rowheight_funcs.h"

BOOL RowHeight::Init(ClcData *dat)
{
	dat->rowHeight = 0;
	dat->row_heights_size = 0;
	dat->row_heights_allocated = 0;
	dat->row_heights = nullptr;

	return TRUE;
}

void RowHeight::Free(ClcData *dat)
{
	if (dat->row_heights != nullptr) {
		free(dat->row_heights);
		dat->row_heights = nullptr;
	}

	dat->row_heights_allocated = 0;
	dat->row_heights_size = 0;
}

void RowHeight::Clear(ClcData *dat)
{
	dat->row_heights_size = 0;
}


BOOL RowHeight::Alloc(ClcData *dat, int size)
{
	if (size > dat->row_heights_size) {
		if (size > dat->row_heights_allocated) {
			int size_grow = size;

			size_grow += 100 - (size_grow % 100);

			if (dat->row_heights != nullptr) {
				int *tmp = (int *)realloc((void *)dat->row_heights, sizeof(int) * size_grow);

				if (tmp == nullptr) {
					Free(dat);
					return FALSE;
				}

				dat->row_heights = tmp;
			}
			else {
				dat->row_heights = (int *)malloc(sizeof(int) * size_grow);

				if (dat->row_heights == nullptr) {
					Free(dat);
					return FALSE;
				}
			}
			dat->row_heights_allocated = size_grow;
		}
		dat->row_heights_size = size;
	}
	return TRUE;
}

// Calc and store max row height
int RowHeight::getMaxRowHeight(ClcData *dat, const HWND hwnd)
{
	int max_height = 0;
	DWORD style = GetWindowLongPtr(hwnd, GWL_STYLE);

	int contact_fonts[] = { FONTID_CONTACTS, FONTID_INVIS, FONTID_OFFLINE, FONTID_NOTONLIST, FONTID_OFFINVIS };
	int other_fonts[] = { FONTID_GROUPS, FONTID_GROUPCOUNTS, FONTID_DIVIDERS };

	// Get contact font size
	for (auto &it : contact_fonts)
		if (max_height < dat->fontInfo[it].fontHeight)
			max_height = dat->fontInfo[it].fontHeight;

	if (cfg::dat.dualRowMode == 1 && !dat->bisEmbedded)
		max_height += ROW_SPACE_BEETWEEN_LINES + dat->fontInfo[FONTID_STATUS].fontHeight;

	// Get other font sizes
	for (auto &it : other_fonts)
		if (max_height < dat->fontInfo[it].fontHeight)
			max_height = dat->fontInfo[it].fontHeight;

	// Avatar size
	if (cfg::dat.dwFlags & CLUI_FRAME_AVATARS && !dat->bisEmbedded)
		max_height = max(max_height, cfg::dat.avatarSize + cfg::dat.avatarPadding);

	// Checkbox size
	if (style & CLS_CHECKBOXES || style & CLS_GROUPCHECKBOXES)
		max_height = max(max_height, dat->checkboxSize);

	//max_height += 2 * dat->row_border;
	// Min size
	max_height = max(max_height, dat->min_row_heigh);
	max_height += cfg::dat.bRowSpacing;

	dat->rowHeight = max_height;

	return max_height;
}

// Calc and store row height for all items in the list
void RowHeight::calcRowHeights(ClcData *dat, HWND hwnd)
{
	DWORD dwStyle = GetWindowLongPtr(hwnd, GWL_STYLE);

	// Draw lines
	ClcGroup *group = &dat->list;
	group->scanIndex = 0;
	int line_num = -1;

	Clear(dat);

	while (true) {
		if (group->scanIndex == group->cl.getCount()) {
			group = group->parent;
			if (group == nullptr) break;	// Finished list
			group->scanIndex++;
			continue;
		}

		// Get item to draw
		ClcContact *cc = group->cl[group->scanIndex];
		line_num++;

		// Calc row height
		getRowHeight(dat, cc, line_num, dwStyle);

		if (cc->type == CLCIT_GROUP && (cc->group->expanded & 0x0000ffff)) {
			group = cc->group;
			group->scanIndex = 0;
			continue;
		}
		group->scanIndex++;
	}
}

// Calc item top Y (using stored data)
int RowHeight::getItemTopY(ClcData *dat, int item)
{
	if (item >= dat->row_heights_size)
		return -1;

	int y = 0;
	for (int i = 0; i < item; i++)
		y += dat->row_heights[i];

	return y;
}

// Calc item bottom Y (using stored data)
int RowHeight::getItemBottomY(ClcData *dat, int item)
{
	if (item >= dat->row_heights_size)
		return -1;

	int y = 0;
	for (int i = 0; i <= item; i++)
		y += dat->row_heights[i];

	return y;
}

// Calc total height of rows (using stored data)
int RowHeight::getTotalHeight(ClcData *dat)
{
	int y = 0;
	for (int i = 0; i < dat->row_heights_size; i++)
		y += dat->row_heights[i];

	return y;
}

// Return the line that pos_y is at or -1 (using stored data)
int RowHeight::hitTest(ClcData *dat, int pos_y)
{
	if (pos_y < 0)
		return -1;

	int y = 0;
	for (int i = 0; i < dat->row_heights_size; i++) {
		y += dat->row_heights[i];
		if (pos_y < y)
			return i;
	}

	return -1;
}

int RowHeight::getHeight(ClcData *dat, int item)
{
	if (dat->row_heights == nullptr)
		return 0;

	return dat->row_heights[item];
}