43 lines
1.4 KiB
Lua
43 lines
1.4 KiB
Lua
 
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-- states/narration.lua
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--
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-- The intro and interlude screens. Text is revealed one line at a time: pressing
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-- enter advances `currentLoadedLine` within `displayData[currentPage]`, and rolls
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-- over to the next page at the end.
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--
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-- Not a list menu, so this uses a custom read(). The "focus" is the most recently
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-- revealed line, keyed by page:line so each newly revealed line is announced once.
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return {
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read = function(stateTable, menus)
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-- Two-level probe. narration.keypressed does not touch these locals
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-- directly -- it just calls continueNarration(), so they are upvalues of
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-- THAT function. We reach continueNarration as an upvalue of keypressed,
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-- then read through it.
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local probeFn = menus.getUpvalue(stateTable.keypressed, "continueNarration")
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if type(probeFn) ~= "function" then
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return nil, nil
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end
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local displayData = menus.getUpvalue(probeFn, "displayData")
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local page = menus.getUpvalue(probeFn, "currentPage")
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local line = menus.getUpvalue(probeFn, "currentLoadedLine")
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if type(displayData) ~= "table" or type(page) ~= "number" or type(line) ~= "number" then
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return nil, nil
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end
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local pageData = displayData[page]
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if type(pageData) ~= "table" then
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return nil, nil
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end
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local entry = pageData[line]
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if type(entry) ~= "table" or not entry.text then
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return nil, nil
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end
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return entry.text, page .. ":" .. line
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end,
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}
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