60 lines
1.5 KiB
Plaintext
60 lines
1.5 KiB
Plaintext
compute_layout = function(node, x,y, nodes_to_render)
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-- append to nodes_to_render flattened instructions to render a hierarchy of nodes
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-- return x,y rendered until (surface coordinates)
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print('compute_layout: node of type', node.type, 'at', x,y)
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table.insert(nodes_to_render, node)
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if node.type == 'text' then
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-- leaf node containing raw text
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node.x = x
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node.y = y
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if node.width then
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node.w = node.width
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else
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local scaled_fontsize = scale(node.fontsize or 20)
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node.text = love.graphics.newText(font(node, scaled_fontsize), node.data)
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node.w = node.text:getWidth()
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end
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initialize_editor(node)
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node.h = box_height(node)
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elseif node.type == 'rows' then
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node.x = x
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node.y = y
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-- lay out children top to bottom
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local subx,suby = x,y
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local w,h = 0,0
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local subnodes
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for _,child in ipairs(node.data) do
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if child.margin then
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suby = suby+child.margin
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h = h+child.margin
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end
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subx,suby = compute_layout(child, x,suby, nodes_to_render)
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if w < child.w then
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w = child.w
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end
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h = h+child.h
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end
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node.w = w
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node.h = h
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elseif node.type == 'cols' then
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node.x = x
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node.y = y
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-- lay out children left to right
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local subx,suby = x,y
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local w,h = 0,0
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for _,child in ipairs(node.data) do
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if child.margin then
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subx = subx+child.margin
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w = w+child.margin
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end
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subx,suby = compute_layout(child, subx,y, nodes_to_render)
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w = w + child.w
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if h < child.h then
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h = child.h
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end
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end
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node.w = w
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node.h = h
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end
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return x+node.w,y+node.h
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end |