src/gui/guiTable.cpp


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/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/


#include "guiTable.h"
#include <queue>
#include <sstream>
#include <utility>
#include <cstring>
#include <IGUISkin.h>
#include <IGUIFont.h>
#include "client/renderingengine.h"
#include "debug.h"
#include "log.h"
#include "client/tile.h"
#include "gettime.h"
#include "util/string.h"
#include "util/numeric.h"
#include "util/string.h" // for parseColorString()
#include "settings.h" // for settings
#include "porting.h" // for dpi
#include "client/guiscalingfilter.h"

/*
	GUITable
*/

GUITable::GUITable(gui::IGUIEnvironment *env,
		gui::IGUIElement* parent, s32 id,
		core::rect<s32> rectangle,
		ISimpleTextureSource *tsrc
):
	gui::IGUIElement(gui::EGUIET_ELEMENT, env, parent, id, rectangle),
	m_tsrc(tsrc)
{
	assert(tsrc != NULL);

	gui::IGUISkin* skin = Environment->getSkin();

	m_font = skin->getFont();
	if (m_font) {
		m_font->grab();
		m_rowheight = m_font->getDimension(L"A").Height + 4;
		m_rowheight = MYMAX(m_rowheight, 1);
	}

	const s32 s = skin->getSize(gui::EGDS_SCROLLBAR_SIZE);
	m_scrollbar = new GUIScrollBar(Environment, this, -1,
			core::rect<s32>(RelativeRect.getWidth() - s,
					0,
					RelativeRect.getWidth(),
					RelativeRect.getHeight()),
			false, true);
	m_scrollbar->setSubElement(true);
	m_scrollbar->setTabStop(false);
	m_scrollbar->setAlignment(gui::EGUIA_LOWERRIGHT, gui::EGUIA_LOWERRIGHT,
			gui::EGUIA_UPPERLEFT, gui::EGUIA_LOWERRIGHT);
	m_scrollbar->setVisible(false);
	m_scrollbar->setPos(0);

	setTabStop(true);
	setTabOrder(-1);
	updateAbsolutePosition();
	float density = RenderingEngine::getDisplayDensity();
#ifdef __ANDROID__
	density = 1; // dp scaling is applied by the skin
#endif
	core::rect<s32> relative_rect = m_scrollbar->getRelativePosition();
	s32 width = (relative_rect.getWidth() / (2.0 / 3.0)) * density *
			g_settings->getFloat("gui_scaling");
	m_scrollbar->setRelativePosition(core::rect<s32>(
			relative_rect.LowerRightCorner.X-width,relative_rect.UpperLeftCorner.Y,
			relative_rect.LowerRightCorner.X,relative_rect.LowerRightCorner.Y
			));
}

GUITable::~GUITable()
{
	for (GUITable::Row &row : m_rows)
		delete[] row.cells;

	if (m_font)
		m_font->drop();

	if (m_scrollbar)
		m_scrollbar->drop();
}

GUITable::Option GUITable::splitOption(const std::string &str)
{
	size_t equal_pos = str.find('=');
	if (equal_pos == std::string::npos)
		return GUITable::Option(str, "");

	return GUITable::Option(str.substr(0, equal_pos),
			str.substr(equal_pos + 1));
}

void GUITable::setTextList(const std::vector<std::string> &content,
		bool transparent)
{
	clear();

	if (transparent) {
		m_background.setAlpha(0);
		m_border = false;
	}

	m_is_textlist = true;

	s32 empty_string_index = allocString("");

	m_rows.resize(content.size());
	for (s32 i = 0; i < (s32) content.size(); ++i) {
		Row *row = &m_rows[i];
		row->cells = new Cell[1];
		row->cellcount = 1;
		row->indent = 0;
		row->visible_index = i;
		m_visible_rows.push_back(i);

		Cell *cell = row->cells;
		cell->xmin = 0;
		cell->xmax = 0x7fff;  // something large enough
		cell->xpos = 6;
		cell->content_type = COLUMN_TYPE_TEXT;
		cell->content_index = empty_string_index;
		cell->tooltip_index = empty_string_index;
		cell->color.set(255, 255, 255, 255);
		cell->color_defined = false;
		cell->reported_column = 1;

		// parse row content (color)
		const std::string &s = content[i];
		if (s[0] == '#' && s[1] == '#') {
			// double # to escape
			cell->content_index = allocString(s.substr(2));
		}
		else if (s[0] == '#' && s.size() >= 7 &&
				parseColorString(
					s.substr(0,7), cell->color, false)) {
			// single # for color
			cell->color_defined = true;
			cell->content_index = allocString(s.substr(7));
		}
		else {
			// no #, just text
			cell->content_index = allocString(s);
		}

	}

	allocationComplete();

	// Clamp scroll bar position
	updateScrollBar();
}

void GUITable::setTable(const TableOptions &options,
		const TableColumns &columns,