Module:Image area

Documentation [edit]

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Details: documentation to be written

If you can correct the issue, please edit the page to do so, then remove this notice.

Please see Template:Image area for usage information. Use the template rather than invoking the module.

The above documentation is transcluded from Module:Image area/doc.

local err = require('Module:Error').call
local p = {}

function p.main(frame)
	return p.call(frame:getParent().args)
end

function p.call(args)
	local defaultWidth = 250-- default viewport size if not passed in parameter
	-- Edit presets here
	local presetList = {
		enessa = {
			class = 'enessa-map',
			width = 7000,
			height = 3799,
		},
	}
	local preset = mw.ustring.lower(args[1] or '')
	if preset and preset ~= '' then
		if presetList[preset] then
			preset = presetList[preset]
		else
			return err('first parameter is invalid')
		end
	else
		return err('first parameter is required')
	end
	
	local caption = args.caption
	if not caption or caption == '' then
		caption = mw.title.getCurrentTitle().subpageText .. ' within ' .. args[1]
	end
	local origWidth = preset.width
	local origHeight = preset.height
	local newWidth = tonumber(args['new width'])
	local newHeight = tonumber(args['new height'])
	if not newWidth then
		if not newHeight then
			newWidth = defaultWidth
		else
			newWidth = preset.width * newHeight / preset.height
		end
	end
	if not newHeight then
		newHeight = preset.height * newWidth / preset.width
	end
	local x1, y1, x2, y2 = args.x1 or '', args.y1 or '', args.x2 or '', args.y2 or ''
	if x1 == '' or y1 == '' or x2 == '' or y2 == '' then
		return err('all four coordinates must be specified')
	end
	local areaWidth = math.abs(x2 - x1)
	local areaHeight = math.abs(y2 - y1)
	local resizeRatio = newWidth / areaWidth
	
	return mw.html.create('div')
		:addClass('background-' .. preset.class)
		:attr('alt', caption)
		:attr('title', caption)
		:css({
			['width'] = newWidth .. 'px',
			['height'] = newHeight .. 'px',
			['background-size'] = preset.width * resizeRatio .. 'px ' .. preset.height * resizeRatio .. 'px',
			['background-position'] = -1 * x1 * resizeRatio .. 'px ' .. -1 * y1 * resizeRatio .. 'px',
			['background-repeat'] = 'no-repeat',
			['overflow'] = 'hidden',
			['border'] = '1px solid #EEE',
		})
		:done()
end

return p