Nothing
draw_page <- (operation, context, page_nr, user_data)
{
cr <- context$getCairoContext()
width <- context$getWidth()
cr$rectangle(0, 0, width, HEADER_HEIGHT)
cr$setSourceRgb(0.8, 0.8, 0.8)
cr$fill()
layout <- context$createPangoLayout()
desc <- pangoFontDescriptionFromString("sans 14")
layout$setFontDescription(desc)
layout$setText("some text")
layout$setWidth(width)
layout$setAlignment(layout, "center")
layout_height <- layout$getSize()$height
text_height <- layout_height / PANGO_SCALE
cr$moveTo(width / 2, (HEADER_HEIGHT - text_height) / 2)
pangoCairoShowLayout(cr, layout)
}
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