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--[[--
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Widget that displays a line.
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]]
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local Blitbuffer = require("ffi/blitbuffer")
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local Widget = require("ui/widget/widget")
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Clarify our OOP semantics across the codebase (#9586)
Basically:
* Use `extend` for class definitions
* Use `new` for object instantiations
That includes some minor code cleanups along the way:
* Updated `Widget`'s docs to make the semantics clearer.
* Removed `should_restrict_JIT` (it's been dead code since https://github.com/koreader/android-luajit-launcher/pull/283)
* Minor refactoring of LuaSettings/LuaData/LuaDefaults/DocSettings to behave (mostly, they are instantiated via `open` instead of `new`) like everything else and handle inheritance properly (i.e., DocSettings is now a proper LuaSettings subclass).
* Default to `WidgetContainer` instead of `InputContainer` for stuff that doesn't actually setup key/gesture events.
* Ditto for explicit `*Listener` only classes, make sure they're based on `EventListener` instead of something uselessly fancier.
* Unless absolutely necessary, do not store references in class objects, ever; only values. Instead, always store references in instances, to avoid both sneaky inheritance issues, and sneaky GC pinning of stale references.
* ReaderUI: Fix one such issue with its `active_widgets` array, with critical implications, as it essentially pinned *all* of ReaderUI's modules, including their reference to the `Document` instance (i.e., that was a big-ass leak).
* Terminal: Make sure the shell is killed on plugin teardown.
* InputText: Fix Home/End/Del physical keys to behave sensibly.
* InputContainer/WidgetContainer: If necessary, compute self.dimen at paintTo time (previously, only InputContainers did, which might have had something to do with random widgets unconcerned about input using it as a baseclass instead of WidgetContainer...).
* OverlapGroup: Compute self.dimen at *init* time, because for some reason it needs to do that, but do it directly in OverlapGroup instead of going through a weird WidgetContainer method that it was the sole user of.
* ReaderCropping: Under no circumstances should a Document instance member (here, self.bbox) risk being `nil`ed!
* Kobo: Minor code cleanups.
2 years ago
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local LineWidget = Widget:extend{
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style = "solid",
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background = Blitbuffer.COLOR_BLACK,
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dimen = nil,
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--- @todo Replay dirty hack here 13.03 2013 (houqp).
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empty_segments = nil,
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}
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function LineWidget:paintTo(bb, x, y)
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if self.style == "none" then return end
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if self.style == "dashed" then
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for i = 0, self.dimen.w - 20, 20 do
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bb:paintRect(x + i, y,
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16, self.dimen.h, self.background)
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end
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else
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if self.empty_segments then
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bb:paintRect(x, y,
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self.empty_segments[1].s,
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self.dimen.h,
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self.background)
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bb:paintRect(x + self.empty_segments[1].e, y,
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self.dimen.w - x - self.empty_segments[1].e,
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self.dimen.h,
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self.background)
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else
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bb:paintRect(x, y, self.dimen.w, self.dimen.h, self.background)
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end
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end
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end
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return LineWidget
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