v0.1.3

src/App.vue

@@ -21,6 +21,7 @@ const hours = [
 ]
 
 const timetableCellCount = hours.length * 6
+let printPageStyleElement = null
 
 function createEmptyTimetable() {
   return Array.from({ length: timetableCellCount }, () => false)
@@ -601,8 +602,29 @@ function clearTaskLabels(record) {
   })
 }
 
+function applyPrintPageStyle(layout) {
+  if (typeof document === 'undefined') {
+    return
+  }
+
+  const pageRule =
+    layout === 'double'
+      ? '@page { size: A4 landscape; margin: 0; }'
+      : '@page { size: A4 portrait; margin: 0; }'
+
+  if (!printPageStyleElement) {
+    printPageStyleElement = document.createElement('style')
+    printPageStyleElement.setAttribute('data-print-page-style', 'true')
+    document.head.appendChild(printPageStyleElement)
+  }
+
+  printPageStyleElement.textContent = pageRule
+  document.body.dataset.printLayout = layout
+}
+
 async function printSelectedPlanner(layout = 'single') {
   printLayout.value = layout
+  applyPrintPageStyle(layout)
   await nextTick()
   window.print()
 }