Module:InfoboxImage

Overview

This module is used within infoboxes to process the image parameters and tidy up the formatting of the result.

Parameters

Parameter	Description
image	Required. The main parameter that should be passed over which contains the image info.
size	Size to display image.
maxsize	Maximum size to display image. Note: If no size or sizedefault params specified then image will be shown at maxsize.
sizedefault	The size to use for the image if no size param is specified. Defaults to frameless.
alt	Alt text for image
title	Title text for image. If blank then alt text is used.
border	If yes, then a border is added.
upright	upright image param.
center	If yes, then the image is centered.
thumbtime	thumbtime param, used for video clips.
suppressplaceholder	If yes then will suppress certain placeholder images.
link	Page to go to when clicking on the image (not used very often)

Note: If you specify the maxsize or sizedefault params, then you should include the px after the number.

Sample Usage

|image = {{#invoke:InfoboxImage|InfoboxImage|image={{{image|}}}|size={{{image_size|}}}|sizedefault=frameless|alt={{{alt|}}}}}

Examples

{{#invoke:InfoboxImage|InfoboxImage}}
{{#invoke:InfoboxImage|InfoboxImage|image=}}
{{#invoke:InfoboxImage|InfoboxImage|image=[[Image:Abbey Rd Studios.jpg|200px]]}}
{{#invoke:InfoboxImage|InfoboxImage|image=Abbey Rd Studios.jpg}} {{#invoke:InfoboxImage|InfoboxImage|image=File:Abbey Rd Studios.jpg}} {{#invoke:InfoboxImage|InfoboxImage|image=Image:Abbey Rd Studios.jpg}}
{{#invoke:InfoboxImage|InfoboxImage|image=Abbey Rd Studios.jpg|size=100px}} {{#invoke:InfoboxImage|InfoboxImage|image=Abbey Rd Studios.jpg|size=100}}
{{#invoke:InfoboxImage|InfoboxImage|image=Abbey Rd Studios.jpg|sizedefault=250px|alt=The front stairs and door of Abbey Road Studios}}
{{#invoke:InfoboxImage|InfoboxImage|image=Abbey Rd Studios.jpg|alt=The front stairs and door of Abbey Road Studios}}
{{#invoke:InfoboxImage|InfoboxImage|image=Abbey Rd Studios.jpg|size=100px|alt=The front stairs and door of Abbey Road Studios}}
{{#invoke:InfoboxImage|InfoboxImage|image=Bandera de Bilbao.svg|size=100|border=yes}}
{{#invoke:InfoboxImage|InfoboxImage|image=Replace this image male.svg|suppressplaceholder=yes}}
{{#invoke:InfoboxImage|InfoboxImage|image=[[Image:replace this image male.svg|200px]]|suppressplaceholder=yes}}
{{#invoke:InfoboxImage|InfoboxImage|image=Abbey Rd Studios.jpg|size=50px|maxsize=100px}}
{{#invoke:InfoboxImage|InfoboxImage|image=Abbey Rd Studios.jpg|size=200px|maxsize=100px}}
{{#invoke:InfoboxImage|InfoboxImage|image=Abbey Rd Studios.jpg|maxsize=100px|center=yes}}

---

-- Inputs:
--    image - Can either be a bare filename (with or without the File:/Image: prefix) or a fully formatted image link
--    page - page to display for multipage images (DjVu)
--    size - size to display the image
--    maxsize - maximum size for image
--    sizedefault - default size to display the image if size param is blank
--    alt - alt text for image
--    title - title text for image
--    border - set to yes if border
--    center - set to yes, if the image has to be centered
--    upright - upright image param
--    suppressplaceholder - if yes then checks to see if image is a placeholder and suppresses it
--    link - page to visit when clicking on image
--    class - HTML classes to add to the image
-- Outputs:
--    Formatted image.
-- More details available at the "Module:InfoboxImage/doc" page

local i = {}

-- List of placeholder images and tracking categories stored in [[Module:InfoboxImage/data]]
-- Other constants:
--   the system-wide default thumbnail size (in px)
local defaultThumbnailSize = 250

-- If page is not a user page, return tracking category. Else return empty.
local function trackingCat(cat)
	local ns = mw.title.getCurrentTitle().nsText:lower()
    local categories = mw.loadData('Module:InfoboxImage/data').categories
	return (ns ~= 'user' and ns ~= 'user talk' and categories[cat]) or ""
end

-- Determine whether image is a placeholder
function i.IsPlaceholder(image)
    -- change underscores to spaces
    image = mw.ustring.gsub(image, "_", " ");
    assert(image ~= nil, 'mw.ustring.gsub(image, "_", " ") must not return nil')
    -- if image starts with [[ then remove that and anything after |
    if mw.ustring.sub(image,1,2) == "[[" then
        image = mw.ustring.sub(image,3);
        image = mw.ustring.gsub(image, "([^|]*)|.*", "%1");
        assert(image ~= nil, 'mw.ustring.gsub(image, "([^|]*)|.*", "%1") must not return nil')
    end
    -- Trim spaces
    image = mw.ustring.gsub(image, '^[ ]*(.-)[ ]*$', '%1');
    assert(image ~= nil, "mw.ustring.gsub(image, '^[ ]*(.-)[ ]*$', '%1') must not return nil")
    -- remove prefix if exists
    local allNames = mw.site.namespaces[6].aliases
    allNames[#allNames + 1] = mw.site.namespaces[6].name
    allNames[#allNames + 1] = mw.site.namespaces[6].canonicalName
    for i, name in ipairs(allNames) do
        if mw.ustring.lower(mw.ustring.sub(image, 1, mw.ustring.len(name) + 1)) == mw.ustring.lower(name .. ":") then
            image = mw.ustring.sub(image, mw.ustring.len(name) + 2);
            break
        end
    end
    -- Trim spaces
    image = mw.ustring.gsub(image, '^[ ]*(.-)[ ]*$', '%1');
    -- capitalise first letter
    image = mw.ustring.upper(mw.ustring.sub(image,1,1)) .. mw.ustring.sub(image,2);

    local placeholder_image = mw.loadData('Module:InfoboxImage/data').placeholder_image
    return placeholder_image[image]
end

local function isempty(x)
    return (not x) or x == ""
end

-- Main entry point
function i.InfoboxImage(frame)
    local image = frame.args["image"];
    
    if isempty(image) then
        return "";
    end
    if image == " " then
        return image;
    end
    if frame.args["suppressplaceholder"] ~= "no" then
        if i.IsPlaceholder(image) == true then
            return "";
        end
    end
    
    if string.find(image, "^%[*https?:") then
		-- Error category.
		return trackingCat("url_image_links")
	end

    if mw.ustring.sub(image,1,2) == "[[" then
        -- search for thumbnail images and add to tracking cat if found
        local cat = "";
        if mw.title.getCurrentTitle().namespace == 0 and (mw.ustring.find(image, "|%s*thumb%s*[|%]]") or mw.ustring.find(image, "|%s*thumbnail%s*[|%]]")) then
            cat = trackingCat("thumbnail_images")
        end
        return image .. cat;
    elseif mw.ustring.sub(image,1,2) == "{{" and mw.ustring.sub(image,1,3) ~= "{{{" then
        return image;
    elseif mw.ustring.sub(image,1,1) == "<" then
        return image;
    elseif mw.ustring.sub(image,1,8) == mw.ustring.char(127).."'\"`UNIQ" then
        -- Found strip marker at begining, so pass don't process at all
        return image;
    else
        local result = "";
        local page = frame.args["page"];
        local upright = frame.args["upright"] or ""
        local size = frame.args["size"];
        local maxsize = frame.args["maxsize"];
        local sizedefault = frame.args["sizedefault"];
        local alt = frame.args["alt"];
        local link = frame.args["link"];
        local title = frame.args["title"];
        local border = frame.args["border"];
        local thumbtime = frame.args["thumbtime"] or "";
        local center = frame.args["center"];
        local class = frame.args["class"];
        
        -- remove prefix if exists
        local allNames = mw.site.namespaces[6].aliases
        allNames[#allNames + 1] = mw.site.namespaces[6].name
        allNames[#allNames + 1] = mw.site.namespaces[6].canonicalName
        for i, name in ipairs(allNames) do
            if mw.ustring.lower(mw.ustring.sub(image, 1, mw.ustring.len(name) + 1)) == mw.ustring.lower(name .. ":") then
                image = mw.ustring.sub(image, mw.ustring.len(name) + 2);
                break
            end
        end
        
        if not isempty(maxsize) then
            -- if no sizedefault nor upright, then set to maxsize
            if isempty(sizedefault) and isempty(upright) then
                sizedefault = maxsize
            end
            -- check to see if size bigger than maxsize
            local maxsizenumber = tonumber(mw.ustring.match(maxsize,"%d*")) or 0;
            if not isempty(size) then
                local sizenumber = tonumber(mw.ustring.match(size,"%d*")) or 0;
                if sizenumber > maxsizenumber and maxsizenumber > 0 then
                    size = maxsize;
                end
            end
            -- check to see if upright bigger than maxsize (at default preferred size)
            if not isempty(upright) then
                local uprightnumber = tonumber(upright) or (upright == "yes" and 0.75) or 0
                if uprightnumber*defaultThumbnailSize > maxsizenumber and maxsizenumber > 0 then
                    upright = tostring(maxsizenumber/defaultThumbnailSize)
                end
            end
        end
        -- add px to size if just a number
        if (tonumber(size) or 0) > 0 then
            size = size .. "px";
        end
        -- add px to sizedefault if just a number
        if (tonumber(sizedefault) or 0) > 0 then
            sizedefault = sizedefault .. "px";
        end
        
        result = "[[File:" .. image;
        if not isempty(page) then
            result = result .. "|page=" .. page;
        end
        if not isempty(size) then
            result = result .. "|" .. size;
        elseif not isempty(sizedefault) and isempty(upright) then
            result = result .. "|" .. sizedefault;
        else
            result = result .. "|frameless";
        end
        if center == "yes" then
            result = result .. "|center"
        end
        if not isempty(alt) then
            result = result .. "|alt=" .. alt;
        end
        if not isempty(link) then
            result = result .. "|link=" .. link;
        end
        if border == "yes" then
            result = result .. "|border";
        end
        if upright == "yes" then
            result = result .. "|upright";
        elseif upright ~= "" then
            result = result .. "|upright=" .. upright;
        end
        if thumbtime ~= "" then
            result = result .. "|thumbtime=" .. thumbtime;
        end
        if not isempty(class) then
            result = result .. "|class=" .. class;
        end
        -- if alt value is a keyword then do not use as a description
        if alt == "thumbnail" or alt == "thumb" or alt == "frameless" or alt == "left" or alt == "center" or alt == "right" or alt == "upright" or alt == "border" or mw.ustring.match(alt or "", '^[0-9]*px$', 1) ~= nil then
            alt = nil;
        end
        if not isempty(title) then
            -- does title param contain any templatestyles? If yes then set to blank.
            if mw.ustring.match(frame:preprocess(title), 'UNIQ%-%-templatestyles', 1) ~= nil then
                title = nil;
            end
        end
        if not isempty(title) then
            result = result .. "|" .. title;
        end
        result = result .. "]]";
        
        return result;
    end
end

return i;