builtin/mainmenu/dlg_delete_world.lua


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--Minetest
--Copyright (C) 2014 sapier
--
--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.


local function delete_world_formspec(dialogdata)

	local retval =
		"size[11.5,4.5,true]" ..
		"label[2,2;" ..
		fgettext("Delete World \"$1\"?", dialogdata.delete_name) .. "]" ..
		"button[3.25,3.5;2.5,0.5;world_delete_confirm;" .. fgettext("Delete") .. "]" ..
		"button[5.75,3.5;2.5,0.5;world_delete_cancel;" .. fgettext("Cancel") .. "]"
	return retval
end

local function delete_world_buttonhandler(this, fields)
	if fields["world_delete_confirm"] then

		if this.data.delete_index > 0 and
			this.data.delete_index <= #menudata.worldlist:get_raw_list() then
			core.delete_world(this.data.delete_index)
			menudata.worldlist:refresh()
		end
		this:delete()
		return true
	end
	
	if fields["world_delete_cancel"] then
		this:delete()
		return true
	end
	
	return false
end


function create_delete_world_dlg(name_to_del,index_to_del)

	assert(name_to_del ~= nil and type(name_to_del) == "string" and name_to_del ~= "")
	assert(index_to_del ~= nil and type(index_to_del) == "number")

	local retval = dialog_create("delete_world",
					delete_world_formspec,
					delete_world_buttonhandler,
					nil)
	retval.data.delete_name  = name_to_del
	retval.data.delete_index = index_to_del
	
	return retval
end
/*
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 <string.h>
#include <IGUISkin.h>
#include <IGUIFont.h>
#include <IGUIScrollBar.h>
#include "debug.h"
#include "log.h"
#include "tile.h"
#include "gettime.h"
#include "util/string.h"
#include "util/numeric.h"
#include "guiFormSpecMenu.h" // for parseColor()

/*
	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),
	m_is_textlist(false),
	m_has_tree_column(false),
	m_selected(-1),
	m_sel_column(0),
	m_sel_doubleclick(false),
	m_keynav_time(0),
	m_keynav_buffer(L""),
	m_border(true),
	m_color(255, 255, 255, 255),
	m_background(255, 0, 0, 0),
	m_highlight(255, 70, 100, 50),
	m_highlight_text(255, 255, 255, 255),
	m_rowheight(1),
	m_font(NULL),
	m_scrollbar(NULL)
{
	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 = Environment->addScrollBar(false,
			core::rect<s32>(RelativeRect.getWidth() - s,
					0,
					RelativeRect.getWidth(),
					RelativeRect.getHeight()),
			this, -1);
	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();
}

GUITable::~GUITable()
{
	for (size_t i = 0; i < m_rows.size(); ++i)
		delete[] m_rows[i].cells;

	if (m_font)
		m_font->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, "");
	else
		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 &&
				GUIFormSpecMenu::parseColor(
					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,
		std::vector<std::string> &content)
{
	clear();

	// Naming conventions:
	// i is always a row index, 0-based
	// j is always a column index, 0-based
	// k is another index, for example an option index

	// Handle table options
	video::SColor default_color(255, 255, 255, 255);
	s32 opendepth = 0;
	for (size_t k = 0; k < options.size(); ++k) {
		const std::string &name = options[k].name;
		const std::string &value = options[k].value;
		if (name == "color")
			GUIFormSpecMenu::parseColor(value, m_color, false);
		else if (name == "background")
			GUIFormSpecMenu::parseColor(value, m_background, false);
		else if (name == "border")
			m_border = is_yes(value);
		else if (name == "highlight")
			GUIFormSpecMenu::parseColor(value, m_highlight, false);
		else if (name == "highlight_text")
			GUIFormSpecMenu::parseColor(value, m_highlight_text, false);
		else if (name == "opendepth")
			opendepth = stoi(value);
		else
			errorstream<<"Invalid table option: \""<<name<<"\""
				<<" (value=\""<<value<<"\")"<<std::endl;
	}

	// Get number of columns and rows
	// note: error case columns.size() == 0 was handled above
	s32 colcount = columns.size();
	assert(colcount >= 1);
	// rowcount = ceil(cellcount / colcount) but use integer arithmetic
	s32 rowcount = (content.size() + colcount - 1) / colcount;
	assert(rowcount >= 0);
	// Append empty strings to content if there is an incomplete row
	s32 cellcount = rowcount * colcount;
	while (content.size() < (u32) cellcount)
		content.push_back("");

	// Create temporary rows (for processing columns)
	struct TempRow {
		// Current horizontal position (may different between rows due
		// to indent/tree columns, or text/image columns with width<0)
		s32 x;
		// Tree indentation level
		s32 indent;
		// Next cell: Index into m_strings or m_images
		s32 content_index;
		// Next cell: Width in pixels
		s32 content_width;
		// Vector of completed cells in this row
		std::vector<Cell> cells;
		// Stores colors and how long they last (maximum column index)
		std::vector<std::pair<video::SColor, s32> > colors;

		TempRow(): x(0), indent(0), content_index(0), content_width(0) {}
	};
	TempRow *rows = new TempRow[rowcount];

	// Get em width. Pedantically speaking, the width of "M" is not
	// necessarily the same as the em width, but whatever, close enough.
	s32 em = 6;
	if (m_font)
		em = m_font->getDimension(L"M").Width;

	s32 default_tooltip_index = allocString("");

	std::map<s32, s32> active_image_indices;

	// Process content in column-major order
	for (s32 j = 0; j < colcount; ++j) {
		// Check column type
		ColumnType columntype = COLUMN_TYPE_TEXT;
		if (columns[j].type == "text")
			columntype = COLUMN_TYPE_TEXT;
		else if (columns[j].type == "image")
			columntype = COLUMN_TYPE_IMAGE;
		else if (columns[j].type == "color")
			columntype = COLUMN_TYPE_COLOR;
		else if (columns[j].type == "indent")
			columntype = COLUMN_TYPE_INDENT;
		else if (columns[j].type == "tree")
			columntype = COLUMN_TYPE_TREE;
		else
			errorstream<<"Invalid table column type: \""
				<<columns[j].type<<"\""<<std::endl;

		// Process column options
		s32 padding = myround(0.5 * em);
		s32 tooltip_index = default_tooltip_index;
		s32 align = 0;
		s32 width = 0;
		s32 span = colcount;

		if (columntype == COLUMN_TYPE_INDENT) {
			padding = 0; // default indent padding
		}
		if (columntype == COLUMN_TYPE_INDENT ||
				columntype == COLUMN_TYPE_TREE) {
			width = myround(em * 1.5); // default indent width
		}

		for (size_t k = 0; k < columns[j].options.size(); ++k) {
			const std::string &name = columns[j].options[k].name;
			const std::string &value = columns[j].options[k].value;
			if (name == "padding")
				padding = myround(stof(value) * em);
			else if (name == "tooltip")
				tooltip_index = allocString(value);
			else if (name == "align" && value == "left")
				align = 0;
			else if (name == "align" && value == "center")
				align = 1;
			else if (name == "align" && value == "right")
				align = 2;
			else if (name == "align" && value == "inline")
				align = 3;
			else if (name == "width")
				width = myround(stof(value) * em);
			else if (name == "span" && columntype == COLUMN_TYPE_COLOR)
				span = stoi(value);
			else if (columntype == COLUMN_TYPE_IMAGE &&
					!name.empty() &&
					string_allowed(name, "0123456789")) {
				s32 content_index = allocImage(value);
				active_image_indices.insert(std::make_pair(
							stoi(name),
							content_index));
			}
			else {
				errorstream<<"Invalid table column option: \""<<name<<"\""
					<<" (value=\""<<value<<"\")"<<std::endl;
			}
		}

		// If current column type can use information from "color" columns,
		// find out which of those is currently active
		if (columntype == COLUMN_TYPE_TEXT) {
			for (s32 i = 0; i < rowcount; ++i) {
				TempRow *row = &rows[i];
				while (!row->colors.empty() && row->colors.back().second < j)
					row->colors.pop_back();
			}
		}

		// Make template for new cells
		Cell newcell;
		memset(&newcell, 0, sizeof newcell);
		newcell.content_type = columntype;
		newcell.tooltip_index = tooltip_index;
		newcell.reported_column = j+1;

		if (columntype == COLUMN_TYPE_TEXT) {
			// Find right edge of column
			s32 xmax = 0;
			for (s32 i = 0; i < rowcount; ++i) {
				TempRow *row = &rows[i];
				row->content_index = allocString(content[i * colcount + j]);
				const core::stringw &text = m_strings[row->content_index];
				row->content_width = m_font ?
					m_font->getDimension(text.c_str()).Width : 0;
				row->content_width = MYMAX(row->content_width, width);
				s32 row_xmax = row->x + padding + row->content_width;
				xmax = MYMAX(xmax, row_xmax);
			}
			// Add a new cell (of text type) to each row
			for (s32 i = 0; i < rowcount; ++i) {
				newcell.xmin = rows[i].x + padding;
				alignContent(&newcell, xmax, rows[i].content_width, align);
				newcell.content_index = rows[i].content_index;
				newcell.color_defined = !rows[i].colors.empty();
				if (newcell.color_defined)
					newcell.color = rows[i].colors.back().first;
				rows[i].cells.push_back(newcell);
				rows[i].x = newcell.xmax;
			}
		}
		else if (columntype == COLUMN_TYPE_IMAGE) {
			// Find right edge of column
			s32 xmax = 0;
			for (s32 i = 0; i < rowcount; ++i) {
				TempRow *row = &rows[i];
				row->content_index = -1;

				// Find content_index. Image indices are defined in
				// column options so check active_image_indices.
				s32 image_index = stoi(content[i * colcount + j]);
				std::map<s32, s32>::iterator image_iter =
					active_image_indices.find(image_index);
				if (image_iter != active_image_indices.end())
					row->content_index = image_iter->second;

				// Get texture object (might be NULL)
				video::ITexture *image = NULL;
				if (row->content_index >= 0)
					image = m_images[row->content_index];

				// Get content width and update xmax
				row->content_width = image ? image->getOriginalSize().Width : 0;
				row->content_width = MYMAX(row->content_width, width);
				s32 row_xmax = row->x + padding + row->content_width;
				xmax = MYMAX(xmax, row_xmax);
			}
			// Add a new cell (of image type) to each row
			for (s32 i = 0; i < rowcount; ++i) {
				newcell.xmin = rows[i].x + padding;
				alignContent(&newcell, xmax, rows[i].content_width, align);
				newcell.content_index = rows[i].content_index;
				rows[i].cells.push_back(newcell);
				rows[i].x = newcell.xmax;
			}
			active_image_indices.clear();
		}
		else if (columntype == COLUMN_TYPE_COLOR) {
			for (s32 i = 0; i < rowcount; ++i) {
				video::SColor cellcolor(255, 255, 255, 255);
				if (GUIFormSpecMenu::parseColor(content[i * colcount + j], cellcolor, true))
					rows[i].colors.push_back(std::make_pair(cellcolor, j+span));
			}
		}
		else if (columntype == COLUMN_TYPE_INDENT ||
				columntype == COLUMN_TYPE_TREE) {
			// For column type "tree", reserve additional space for +/-
			// Also enable special processing for treeview-type tables
			s32 content_width = 0;
			if (columntype == COLUMN_TYPE_TREE) {
				content_width = m_font ? m_font->getDimension(L"+").Width : 0;
				m_has_tree_column = true;
			}
			// Add a new cell (of indent or tree type) to each row
			for (s32 i = 0; i < rowcount; ++i) {
				TempRow *row = &rows[i];

				s32 indentlevel = stoi(content[i * colcount + j]);
				indentlevel = MYMAX(indentlevel, 0);
				if (columntype == COLUMN_TYPE_TREE)
					row->indent = indentlevel;

				newcell.xmin = row->x + padding;
				newcell.xpos = newcell.xmin + indentlevel * width;
				newcell.xmax = newcell.xpos + content_width;
				newcell.content_index = 0;
				newcell.color_defined = !rows[i].colors.empty();
				if (newcell.color_defined)
					newcell.color = rows[i].colors.back().first;
				row->cells.push_back(newcell);
				row->x = newcell.xmax;
			}
		}
	}

	// Copy temporary rows to not so temporary rows
	if (rowcount >= 1) {
		m_rows.resize(rowcount);
		for (s32 i = 0; i < rowcount; ++i) {
			Row *row = &m_rows[i];
			row->cellcount = rows[i].cells.size();
			row->cells = new Cell[row->cellcount];
			memcpy((void*) row->cells, (void*) &rows[i].cells[0],
					row->cellcount * sizeof(Cell));
			row->indent = rows[i].indent;
			row->visible_index = i;
			m_visible_rows.push_back(i);
		}
	}

	if (m_has_tree_column) {
		// Treeview: convent tree to indent cells on leaf rows
		for (s32 i = 0; i < rowcount; ++i) {
			if (i == rowcount-1 || m_rows[i].indent >= m_rows[i+1].indent)
				for (s32 j = 0; j < m_rows[i].cellcount; ++j)
					if (m_rows[i].cells[j].content_type == COLUMN_TYPE_TREE)
						m_rows[i].cells[j].content_type = COLUMN_TYPE_INDENT;
		}

		// Treeview: close rows according to opendepth option
		std::set<s32> opened_trees;
		for (s32 i = 0; i < rowcount; ++i)
			if (m_rows[i].indent < opendepth)
				opened_trees.insert(i);
		setOpenedTrees(opened_trees);
	}

	// Delete temporary information used only during setTable()
	delete[] rows;
	allocationComplete();

	// Clamp scroll bar position
	updateScrollBar();
}

void GUITable::clear()
{
	// Clean up cells and rows
	for (size_t i = 0; i < m_rows.size(); ++i)
		delete[] m_rows[i].cells;
	m_rows.clear();
	m_visible_rows.clear();

	// Get colors from skin
	gui::IGUISkin *skin = Environment->getSkin();
	m_color          = skin->getColor(gui::EGDC_BUTTON_TEXT);
	m_background     = skin->getColor(gui::EGDC_3D_HIGH_LIGHT);
	m_highlight      = skin->getColor(gui::EGDC_HIGH_LIGHT);
	m_highlight_text = skin->getColor(gui::EGDC_HIGH_LIGHT_TEXT);

	// Reset members
	m_is_textlist = false;
	m_has_tree_column = false;
	m_selected = -1;
	m_sel_column = 0;
	m_sel_doubleclick = false;
	m_keynav_time = 0;
	m_keynav_buffer = L"";
	m_border = true;
	m_strings.clear();
	m_images.clear();
	m_alloc_strings.clear();
	m_alloc_images.clear();
}

std::string GUITable::checkEvent()
{
	s32 sel = getSelected();
	assert(sel >= 0);

	if (sel == 0) {
		return "INV";
	}

	std::ostringstream os(std::ios::binary);
	if (m_sel_doubleclick) {
		os<<"DCL:";
		m_sel_doubleclick = false;
	}
	else {