--DOC_GEN_IMAGE --DOC_HIDE_START
local parent = ...
local wibox  = require("wibox")
local color = require("gears.color")
local cairo = require("lgi").cairo

-- luacheck: push no max string line length

local image_path = [[
<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="48" height="48" viewBox="0 0 12.7 12.7">
   <defs>
      <linearGradient id="a">
         <stop style="stop-color:#ff2121;stop-opacity:1" offset="0" />
         <stop style="stop-color:#2c21ff;stop-opacity:1" offset="1" />
      </linearGradient>
      <linearGradient xlink:href="#a" id="b" x1="37.798" y1="89.869" x2="148.167" y2="200.238" gradientUnits="userSpaceOnUse" gradientTransform="translate(31.412 180.42) scale(.11008)" />
      <linearGradient xlink:href="#a" id="c" gradientUnits="userSpaceOnUse" gradientTransform="translate(31.412 180.42) scale(.11008)" x1="148.167" y1="200.238" x2="37.798" y2="89.869" />
   </defs>
   <g transform="translate(-35.298 -190.038)">
      <rect style="opacity:1;fill:url(#b);fill-opacity:1;stroke:none;stroke-width:.55040765;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" width="12.15" height="12.15" x="35.573" y="190.313" rx="2.371" ry="2.371" />
      <path style="color:#000;dominant-baseline:auto;baseline-shift:baseline;white-space:normal;shape-padding:0;clip-rule:nonzero;display:inline;overflow:visible;visibility:visible;opacity:1;isolation:auto;mix-blend-mode:normal;color-interpolation:sRGB;color-interpolation-filters:linearRGB;solid-color:#000;solid-opacity:1;vector-effect:none;fill:url(#c);fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:.55040765;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;color-rendering:auto;image-rendering:auto;shape-rendering:auto;enable-background:accumulate" d="M37.943 190.037a2.647 2.647 0 0 0-2.646 2.647v7.408a2.647 2.647 0 0 0 2.646 2.646h7.409a2.647 2.647 0 0 0 2.646-2.646v-7.408a2.647 2.647 0 0 0-2.646-2.647zm0 .55h7.409c1.165 0 2.095.931 2.095 2.097v7.408c0 1.165-.93 2.095-2.095 2.095h-7.409a2.085 2.085 0 0 1-2.095-2.095v-7.408c0-1.166.93-2.096 2.095-2.096z" />
   </g>
</svg>
]]
--luacheck: pop

local l = wibox.layout {
    forced_width  = 260,
    spacing       = 5,
    layout        = wibox.layout.fixed.vertical
}

local function sur_to_pat(img2)
    local pat = cairo.Pattern.create_for_surface(img2)
    pat:set_extend(cairo.Extend.REPEAT)
    return pat
end

-- Imported for elv13/blind/pattern.lua
local function stripe_pat(col, angle, line_width, spacing)
    col        = color(col)
    angle      = angle or math.pi/4
    line_width = line_width or 2
    spacing    = spacing or 2

    local hy = line_width + 2*spacing

    -- Get the necessary width and height so the line repeat itself correctly
    local a, o = math.cos(angle)*hy, math.sin(angle)*hy

    local w, h = math.ceil(a + (line_width - 1)), math.ceil(o + (line_width - 1))

    -- Create the pattern
    local img2 = cairo.SvgSurface.create(nil, w, h)
    local cr2  = cairo.Context(img2)
    cr2:set_antialias(cairo.ANTIALIAS_NONE)

    -- Avoid artefacts caused by anti-aliasing
    local offset = line_width

    -- Setup
    cr2:set_source(color(col))
    cr2:set_line_width(line_width)

    -- The central line
    cr2:move_to(-offset, -offset)
    cr2:line_to(w+offset, h+offset)
    cr2:stroke()

    -- Top right
    cr2:move_to(-offset + w - spacing/2+line_width, -offset)
    cr2:line_to(2*w+offset - spacing/2+line_width, h+offset)
    cr2:stroke()

    -- Bottom left
    cr2:move_to(-offset + spacing/2-line_width, -offset + h)
    cr2:line_to(w+offset + spacing/2-line_width, 2*h+offset)
    cr2:stroke()

    return sur_to_pat(img2)
end

local stripe_pattern = stripe_pat("#ff0000")


--DOC_HIDE_END
local paddings = {
    0,
    5,
    10,
    {
        left   = 5,
        top    = 5,
        bottom = 10,
        right  = 10,
    }
}

--DOC_NEWLINE

for _, padding in ipairs(paddings) do
    local w = wibox.widget {
        {
            {
                markup        = "<b>Central widget</b>",
                valign        = "center",
                align         = "center",
                forced_height = 30,
                forced_width  = 30,
                widget        = wibox.widget.textbox
            },
            bg     = stripe_pattern,
            widget = wibox.container.background
        },

        borders      = 10,
        paddings     = padding,
        border_image = image_path,
        widget       = wibox.container.border
    }

    --DOC_HIDE_START

    if type(padding) == "table" then
        padding = "{left=5, top=5, bottom=10, right=10}"
    end

    l:add(wibox.widget {
        {
            markup = "<b>paddings = "..padding.."</b>",
            widget = wibox.widget.textbox,
        },
        w,
        layout = wibox.layout.fixed.vertical,
    })
    --DOC_HIDE_END
end

parent:add(l) --DOC_HIDE

--DOC_HIDE vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80