Add ImageMagick Clock plugin (#46)

* Add ImageMagick Clock plugin ImageMagick Clock draws a custom clock using ImageMagick (or any other CLI image drawing tool). * Address review comments * Update thumbnail * Add description to image_width/height settings * Guard the mv command to fix race condition * Handle time jump (resume from sleep)
2026-07-19 08:45:34 -04:00
parent 175e5183e6
commit 493365b028
5 changed files with 199 additions and 0 deletions
@@ -0,0 +1,91 @@
+local CMDLINE_TEMPLATE = noctalia.getConfig("command_line")
+local IMAGE_WIDTH = noctalia.getConfig("image_width")
+local IMAGE_HEIGHT = noctalia.getConfig("image_height")
+
+local OUTPUT_DIR = noctalia.pluginDataDir()
+local CURRENT_CLOCK_FACE_PATH = OUTPUT_DIR .. "/current.png"
+local NEXT_CLOCK_FACE_PATH = OUTPUT_DIR .. "/next.png"
+
+local generatingClockFace = false
+local movingClockFace = false
+local nextClockFaceReady = false
+local nextClockFaceTimestamp = nil
+
+local function drawClockFace(timestamp)
+  if generatingClockFace then
+    return
+  end
+
+  generatingClockFace = true
+
+  local cmdline = string.gsub(CMDLINE_TEMPLATE, "%%output_file", NEXT_CLOCK_FACE_PATH)
+  cmdline = os.date(cmdline, timestamp)
+  -- print("Running command: " .. cmdline)
+
+  noctalia.runAsync(cmdline, function(result)
+    generatingClockFace = false
+    nextClockFaceTimestamp = timestamp
+    if result.exitCode == 0 then
+      nextClockFaceReady = true
+    else
+      print("Error generating clock face: " .. result.stderr .. " (command: " .. cmdline .. ") " .. "output: " .. result.stdout)
+      nextClockFaceReady = false
+    end
+  end)
+end
+
+local function drawCurrentClockFace()
+  local timestamp = os.time()
+  local time = os.date("*t", timestamp)
+  local currentTimestamp = timestamp - time.sec
+  -- print("Drawing current clock face at " .. os.date("%H:%M:%S", nextTimestamp))
+  drawClockFace(currentTimestamp)
+end
+
+local function drawNextClockFace()
+  local timestamp = os.time()
+  local time = os.date("*t", timestamp)
+  local nextTimestamp = timestamp - time.sec + 60
+  -- print("Drawing next clock face at " .. os.date("%H:%M:%S", nextTimestamp))
+  drawClockFace(nextTimestamp)
+end
+
+function update()
+  local timestamp = os.time()
+  if generatingClockFace or movingClockFace or (nextClockFaceTimestamp and timestamp < nextClockFaceTimestamp and timestamp >= nextClockFaceTimestamp - 60) then
+    return
+  end
+
+  if not nextClockFaceTimestamp or timestamp >= nextClockFaceTimestamp + 60 or timestamp < nextClockFaceTimestamp - 60 then
+    -- Next clock face unavailable (startup), or doesn't match current time (resume from sleep, or system clock changed).
+    -- Either case, draw the current clock face immediately.
+    drawCurrentClockFace()
+    return
+  end
+
+  if nextClockFaceReady then
+    nextClockFaceReady = false
+    movingClockFace = true
+    noctalia.runAsync("mv -f '" .. NEXT_CLOCK_FACE_PATH .. "' '" .. CURRENT_CLOCK_FACE_PATH .. "'", function(result)
+      movingClockFace = false
+      if result.exitCode == 0 then
+        barWidget.setImage(CURRENT_CLOCK_FACE_PATH, true, IMAGE_WIDTH, IMAGE_HEIGHT)
+      else
+        print("Error moving new clock face: " .. result.stderr .. " (command: mv -f " .. NEXT_CLOCK_FACE_PATH .. " " .. CURRENT_CLOCK_FACE_PATH .. ") " .. "output: " .. result.stdout)
+      end
+      drawNextClockFace()
+    end)
+  else
+    drawNextClockFace()
+  end
+end
+
+function onClick()
+  noctalia.runAsync("noctalia msg panel-toggle control-center calendar", function(result)
+    if result.exitCode ~= 0 then
+      print("Error toggling calendar panel: " .. result.stderr .. " (command: noctalia msg panel-toggle control-center calendar) " .. "output: " .. result.stdout)
+    end
+  end)
+end
+
+noctalia.setUpdateInterval(1000)