feat(CountersSelector): refactor + better title bar

libs/ui/CountersSelector.lua

@@ -4,32 +4,40 @@ local function noTitleFn()
   return ""
 end
 
+local function withColor(win, textColor, backgroundColor, callbackFn)
+  local originalTextColor = nil
+  local originalBackgroundColor = nil
+
+  if textColor then
+    originalTextColor = win.getTextColor()
+    win.setTextColor(textColor)
+  end
+
+  if backgroundColor then
+    originalBackgroundColor = win.getBackgroundColor()
+    win.setBackgroundColor(backgroundColor)
+  end
+
+  local result = table.pack(callbackFn(win))
+
+  if originalTextColor then
+    win.setTextColor(originalTextColor)
+  end
+
+  if originalBackgroundColor then
+    win.setBackgroundColor(originalBackgroundColor)
+  end
+
+  return table.unpack(result)
+end
+
 local function createWriteWithColor(textColor, backgroundColor, givenWin)
   local win = givenWin or term
 
   return function(str)
-    local originalTextColor = nil
+    return withColor(win, textColor, backgroundColor, function()
-    local originalBackgroundColor = nil
+      return win.write(str)
-
+    end)
-    if textColor then
-      originalTextColor = win.getTextColor()
-      win.setTextColor(textColor)
-    end
-
-    if backgroundColor then
-      originalBackgroundColor = win.getBackgroundColor()
-      win.setBackgroundColor(backgroundColor)
-    end
-
-    win.write(str)
-
-    if originalTextColor then
-      win.setTextColor(originalTextColor)
-    end
-
-    if originalBackgroundColor then
-      win.setBackgroundColor(originalBackgroundColor)
-    end
   end
 end
 
@@ -71,49 +79,54 @@ local function takeN(t, n)
   return result
 end
 
-local TITLE_MARGIN = 1
+local function renderCountersMap(win, countersMap, selectedCounter)
-
+  win.clear()
-local function renderCountersMap(win, countersMap, selectedCounter, titleFn)
-  local writeRegular = createWriteWithColor(colors.white, colors.black, win)
-  local writeSelected = createWriteWithColor(colors.black, colors.white, win)
-
   win.setCursorPos(1, 1)
   local _, height = win.getSize()
   -- local nbCounters = utils.sizeof(countersMap)
   -- local totalCount = getTotalCount(countersMap)
 
-  local topMargin = 0
+  -- if titleFn ~= noTitleFn then
-  local bottomMargin = 0
+  --   withColor(win, colors.white, colors.green, function()
+  --     win.clearLine()
+  --     win.write(titleFn(countersMap, selectedCounter))
+  --   end)
 
-  if titleFn ~= noTitleFn then
+  --   -- topMargin = TITLE_MARGIN
-    writeRegular('custom title: ' .. titleFn(countersMap, selectedCounter))
+  -- end
-    topMargin = TITLE_MARGIN
-  end
 
-  local availableHeight = height - topMargin - bottomMargin
+  local selectedPage = math.floor((selectedCounter - 1) / height) + 1
+  -- local totalPages = (nbCounters % height) + 1
 
-  local selectedPage = math.floor((selectedCounter - 1) / availableHeight) + 1
+  local nbElementsToOmit = (selectedPage - 1) * height
-  -- local totalPages = (nbCounters % availableHeight) + 1
+  local displayedCounters = takeN(dropN(countersMap, nbElementsToOmit), height)
 
-  local nbElementsToOmit = (selectedPage - 1) * availableHeight
+  local cursorYIndex = 1
-  local displayedCounters = takeN(dropN(countersMap, nbElementsToOmit), availableHeight)
-
-  local cursorYIndex = 1 + topMargin
   for k,v in pairs(displayedCounters) do
     win.setCursorPos(1, cursorYIndex)
 
-    local line = tostring(v.name) .. ' ' .. tostring(v.count)
+    local writeLine = function() return tostring(v.name) .. ' ' .. tostring(v.count) end
 
     if k == selectedCounter then
-      writeSelected(line)
+      withColor(win, colors.black, colors.white, writeLine)
     else
-      writeRegular(line)
+      withColor(win, colors.white, colors.black, writeLine)
     end
 
     cursorYIndex = cursorYIndex + 1
   end
 end
 
+local function renderTitle(win, countersMap, selectedCounter, titleFn)
+  win.clear()
+  win.setCursorPos(1, 1)
+
+  withColor(win, colors.white, colors.green, function()
+    win.clearLine()
+    win.write(titleFn(countersMap, selectedCounter))
+  end)
+end
+
 local function CountersSelector(initialCountersMap, config)
   local countersMap = utils.shallowClone(initialCountersMap)
   local counterMax = config.counterMax
@@ -135,19 +148,18 @@ local function CountersSelector(initialCountersMap, config)
     error('counter cannot be greater than the counterMax')
   end
 
-  local topHeight = 0
+  local topHeight = 1
-  if titleFn ~= noTitleFn then
-    topHeight = 1
-  end
 
   term.clear()
   local width, height = term.getSize()
   local mainWin = window.create(term.current(), 1, 1 + topHeight, width, height - topHeight)
+  local titleWin = window.create(term.current(), 1, 1, width, 1 + topHeight)
 
   local shouldContinue = true
   while shouldContinue do
-    mainWin.clear()
+    renderTitle(titleWin, countersMap, selectedCounter, titleFn)
-    renderCountersMap(mainWin, countersMap, selectedCounter, titleFn)
+    renderCountersMap(mainWin, countersMap, selectedCounter)
+
     local _, keyPressed, _ = os.pullEvent('key')
 
     if keyPressed == keys.up then