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module Chelleport.View (render) where
import Chelleport.Draw
import Chelleport.Types
import Chelleport.Utils (intToCInt, isEmpty, isNotEmpty)
import Control.Monad (forM_, void, when)
import Data.List (isPrefixOf, (\\))
import Data.Maybe (isJust)
import qualified Data.Text as Text
import Foreign.C (CInt)
render :: (MonadDraw m) => State -> m ()
render state = do
renderGridLines state
(wcell, hcell) <- cellSize state
forM_ (zip [0 ..] $ stateGrid state) $ \(rowIndex, row) -> forM_ (zip [0 ..] row) $ \(colIndex, cell) -> do
let py = rowIndex * hcell + 10
let px = colIndex * wcell + wcell `div` 2 - 20
visible <- renderKeySequence (stateKeySequence state) cell (px, py)
when visible $ do
renderTargetPoints state (rowIndex, colIndex)
renderKeySequence ::(MonadDraw m) => KeySequence -> Cell -> (CInt, CInt) -> m Bool
renderKeySequence keySequence cell (px, py) = do
let (matched, remaining)
| keySequence `isPrefixOf` cell = splitAt (length keySequence) cell
| otherwise = ("", cell)
let textColor
| isEmpty keySequence = Just colorWhite
| isNotEmpty matched = Just colorHighlight
| otherwise = Nothing
previousTextWidth <- if isNotEmpty matched
then fst <$> drawText (px, py) colorLightGray (Text.pack matched)
else pure 0
when (isNotEmpty remaining) $ case textColor of
Just color -> do
let pos = px + previousTextWidth
void $ drawText (pos, py) color $ Text.pack remaining
Nothing -> pure ()
pure (isJust textColor)
renderGridLines :: (MonadDraw m) => State -> m ()
renderGridLines state = do
let grid = stateGrid state
(wcell, hcell) <- cellSize state
let rows = intToCInt $ length grid
let columns = intToCInt $ length $ head grid
forM_ [0 .. rows] $ \rowIndex -> do
setDrawColor colorFocusLines
drawHorizontalLine (rowIndex * hcell + hcell `div` 2)
setDrawColor colorGridLines
drawHorizontalLine $ rowIndex * hcell
forM_ [0 .. columns] $ \colIndex -> do
setDrawColor colorFocusLines
drawVerticalLine (colIndex * wcell + wcell `div` 2)
setDrawColor colorGridLines
drawVerticalLine $ colIndex * wcell
setDrawColor colorAxisLines
drawHorizontalLine (rows * hcell `div` 2)
drawVerticalLine (columns * wcell `div` 2)
renderTargetPoints :: (MonadDraw m) =>State -> (CInt, CInt) -> m ()
renderTargetPoints state (row, col) = do
(wcell, hcell) <- cellSize state
let (x, y) = (col * wcell + wcell `div` 2, row * hcell + hcell `div` 2)
setDrawColor colorWhite
drawCircle 2 (x, y)
when (stateIsMatched state) $ do
setDrawColor colorFineGrainGrid
forM_ ([-8 .. 8] \\ [0]) $ \n -> do
let px = x + n * wcell `div` 16
drawLine (px, y - hcell `div` 2) (px, y + hcell `div` 2)
forM_ ([-8 .. 8] \\ [0]) $ \n -> do
let py = y + n * hcell `div` 16
drawLine (x - wcell `div` 2, py) (x + wcell `div` 2, py)
setDrawColor colorLightGray
let lenx = wcell `div` 4
let leny = hcell `div` 4
drawLine (x - wcell `div` 4, y - leny) (x - wcell `div` 4, y + leny)
drawLine (x + wcell `div` 4, y - leny) (x + wcell `div` 4, y + leny)
drawLine (x - lenx, y - hcell `div` 4) (x + lenx, y - hcell `div` 4)
drawLine (x - lenx, y + hcell `div` 4) (x + lenx, y + hcell `div` 4)
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