# NOTE: backend should implement `html_body` and `html_head`
# CREDIT: parts of this implementation were inspired by @joshday's PlotlyLocal.jl
function standalone_html(plt::AbstractPlot; title::AbstractString = get(plt.attr, :window_title, "Plots.jl"))
"""
$title
$(html_head(plt))
$(html_body(plt))
"""
end
function open_browser_window(filename::AbstractString)
@compat @static if is_apple()
return run(`open $(filename)`)
end
@compat @static if is_linux()
return run(`xdg-open $(filename)`)
end
@compat @static if is_windows()
return run(`$(ENV["COMSPEC"]) /c start $(filename)`)
end
warn("Unknown OS... cannot open browser window.")
end
function write_temp_html(plt::AbstractPlot)
html = standalone_html(plt; title = plt.attr[:window_title])
filename = string(tempname(), ".html")
output = open(filename, "w")
write(output, html)
close(output)
filename
end
function standalone_html_window(plt::AbstractPlot)
filename = write_temp_html(plt)
open_browser_window(filename)
end
# uses wkhtmltopdf/wkhtmltoimage: http://wkhtmltopdf.org/downloads.html
function html_to_png(html_fn, png_fn, w, h)
run(`wkhtmltoimage -f png -q --width $w --height $h --disable-smart-width $html_fn $png_fn`)
end
function writemime_png_from_html(io::IO, plt::AbstractPlot)
# write html to a temporary file
html_fn = write_temp_html(plt)
# convert that html file to a temporary png file using wkhtmltoimage
png_fn = tempname() * ".png"
w, h = plt.attr[:size]
html_to_png(html_fn, png_fn, w, h)
# now read that file data into io
pngdata = readall(png_fn)
write(io, pngdata)
end