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refactor: extract App.vue logic into composables (762→230 lines)
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Extracted complex logic from App.vue into focused, reusable composables:

New composables:
- useKeyboardShortcuts.js (~80 lines): Keyboard shortcuts (Cmd/Ctrl+S, P, Escape, \)
- useIframeInteractions.js (~370 lines): Page/element hover, labels, clicks, popups
- usePreviewRenderer.js (~160 lines): Double buffering, transitions, scroll persistence
- usePrintPreview.js (~70 lines): Print dialog and style collection

Benefits:
- 70% reduction in App.vue size (532 lines extracted)
- Better separation of concerns
- Improved maintainability and testability
- Clearer code organization

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
This commit is contained in:
isUnknown 2026-01-09 17:20:10 +01:00
parent dac532a932
commit be7bb66e70
5 changed files with 729 additions and 581 deletions
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630
src/App.vue
View file

@ -5,10 +5,13 @@ import ElementPopup from './components/ElementPopup.vue';
import PagePopup from './components/PagePopup.vue';
import PreviewLoader from './components/PreviewLoader.vue';
import SaveButton from './components/SaveButton.vue';
import { onMounted, onUnmounted, ref, watch, computed, provide } from 'vue';
import { onMounted, ref, computed, provide } from 'vue';
import { useStylesheetStore } from './stores/stylesheet';
import { useNarrativeStore } from './stores/narrative';
import Coloris from '@melloware/coloris';
import { useKeyboardShortcuts } from './composables/useKeyboardShortcuts';
import { useIframeInteractions } from './composables/useIframeInteractions';
import { usePreviewRenderer } from './composables/usePreviewRenderer';
import { usePrintPreview } from './composables/usePrintPreview';
const stylesheetStore = useStylesheetStore();
const narrativeStore = useNarrativeStore();
@ -21,16 +24,32 @@ const activeTab = ref('');
provide('activeTab', activeTab);
// Page interaction state
const hoveredPage = ref(null);
const selectedPages = ref([]); // Pages with active border (when popup is open)
const hoveredElement = ref(null); // Currently hovered content element
const selectedElement = ref(null); // Selected element (when popup is open)
const EDGE_THRESHOLD = 30; // px from edge to trigger hover
// Setup iframe interactions (hover, click, labels)
const {
hoveredPage,
selectedPages,
hoveredElement,
selectedElement,
handleIframeMouseMove,
handleIframeClick,
handlePagePopupClose,
handleElementPopupClose,
} = useIframeInteractions({ elementPopup, pagePopup });
let savedScrollPercentage = 0;
const currentFrameIndex = ref(1); // 1 or 2, which iframe is currently visible
const isTransitioning = ref(false);
// Setup preview renderer with double buffering
const {
renderPreview,
currentFrameIndex,
isTransitioning,
setKeyboardShortcutHandler,
} = usePreviewRenderer({
previewFrame1,
previewFrame2,
stylesheetStore,
narrativeStore,
handleIframeMouseMove,
handleIframeClick,
});
const activeFrame = computed(() => {
return currentFrameIndex.value === 1
@ -38,568 +57,25 @@ const activeFrame = computed(() => {
: previewFrame2.value;
});
// Detect platform for keyboard shortcut display
const isMac = typeof navigator !== 'undefined' && navigator.platform.toUpperCase().indexOf('MAC') >= 0;
// Handle keyboard shortcuts
const handleKeyboardShortcut = (event) => {
// Escape key - close any open popup
if (event.key === 'Escape') {
if (elementPopup.value?.visible) {
elementPopup.value.close();
return;
}
if (pagePopup.value?.visible) {
pagePopup.value.close();
return;
}
}
// Backslash key - toggle editor panel
if (event.key === '\\') {
event.preventDefault();
// Toggle: if panel is closed, open to 'document' tab; if open, close it
activeTab.value = activeTab.value.length > 0 ? '' : 'document';
return;
}
// Cmd+P (Mac) or Ctrl+P (Windows/Linux) - print
if ((event.metaKey || event.ctrlKey) && event.key === 'p') {
event.preventDefault();
printPreview();
return;
}
// Cmd+S (Mac) or Ctrl+S (Windows/Linux) - save
if ((event.metaKey || event.ctrlKey) && event.key === 's') {
event.preventDefault();
// Only save if there are changes and not currently saving
if (stylesheetStore.isDirty && !stylesheetStore.isSaving) {
stylesheetStore.saveCustomCss();
}
}
};
// Check if mouse position is near the edges of a page element
const isNearPageEdge = (pageElement, mouseX, mouseY) => {
const rect = pageElement.getBoundingClientRect();
const nearLeft = mouseX >= rect.left && mouseX <= rect.left + EDGE_THRESHOLD;
const nearRight =
mouseX >= rect.right - EDGE_THRESHOLD && mouseX <= rect.right;
const nearTop = mouseY >= rect.top && mouseY <= rect.top + EDGE_THRESHOLD;
const nearBottom =
mouseY >= rect.bottom - EDGE_THRESHOLD && mouseY <= rect.bottom;
const inHorizontalRange = mouseY >= rect.top && mouseY <= rect.bottom;
const inVerticalRange = mouseX >= rect.left && mouseX <= rect.right;
return (
(nearLeft && inHorizontalRange) ||
(nearRight && inHorizontalRange) ||
(nearTop && inVerticalRange) ||
(nearBottom && inVerticalRange)
);
};
// Get all pages using the same template as the given page
const getPagesWithSameTemplate = (page, doc) => {
const pageType = page.getAttribute('data-page-type') || 'default';
const allPages = doc.querySelectorAll('.pagedjs_page');
return Array.from(allPages).filter(
(p) => (p.getAttribute('data-page-type') || 'default') === pageType
);
};
// Get selector for element (same logic as ElementPopup)
const getSelectorFromElement = (element) => {
if (element.id) {
return `#${element.id}`;
}
const tagName = element.tagName.toLowerCase();
// Filter out state classes (element-hovered, element-selected, page-hovered, page-selected)
const classes = Array.from(element.classList).filter(
(cls) =>
![
'element-hovered',
'element-selected',
'page-hovered',
'page-selected',
].includes(cls)
);
if (classes.length > 0) {
return `${tagName}.${classes[0]}`;
}
return tagName;
};
// Create and position element label on hover
const createElementLabel = (element) => {
const doc = element.ownerDocument;
const existingLabel = doc.querySelector('.element-hover-label');
if (existingLabel) {
existingLabel.remove();
}
const rect = element.getBoundingClientRect();
const scrollTop = doc.documentElement.scrollTop || doc.body.scrollTop;
const scrollLeft = doc.documentElement.scrollLeft || doc.body.scrollLeft;
const label = doc.createElement('div');
label.className = 'element-hover-label';
label.textContent = getSelectorFromElement(element);
label.style.top = `${rect.top + scrollTop - 32}px`;
label.style.left = `${rect.left + scrollLeft}px`;
doc.body.appendChild(label);
return label;
};
// Remove element label
const removeElementLabel = (doc) => {
const label = doc.querySelector('.element-hover-label');
if (label) {
label.remove();
}
};
// Create and position page label on hover
const createPageLabel = (page) => {
const doc = page.ownerDocument;
const existingLabel = doc.querySelector('.page-hover-label');
if (existingLabel) {
existingLabel.remove();
}
const rect = page.getBoundingClientRect();
const scrollTop = doc.documentElement.scrollTop || doc.body.scrollTop;
const scrollLeft = doc.documentElement.scrollLeft || doc.body.scrollLeft;
const templateName = page.getAttribute('data-page-type') || 'default';
const label = doc.createElement('div');
label.className = 'page-hover-label';
label.textContent = `@page ${templateName}`;
label.style.top = `${rect.top + scrollTop - 32}px`;
label.style.left = `${rect.left + scrollLeft}px`;
doc.body.appendChild(label);
return label;
};
// Remove page label
const removePageLabel = (doc) => {
const label = doc.querySelector('.page-hover-label');
if (label) {
label.remove();
}
};
// Handle mouse movement in iframe
const handleIframeMouseMove = (event) => {
const pages = event.target.ownerDocument.querySelectorAll('.pagedjs_page');
let foundPage = null;
// Check if hovering near page edge
for (const page of pages) {
if (isNearPageEdge(page, event.clientX, event.clientY)) {
foundPage = page;
break;
}
}
// Update page hover state
if (foundPage !== hoveredPage.value) {
// Remove highlight from previous page (only if not in selectedPages)
if (hoveredPage.value && !selectedPages.value.includes(hoveredPage.value)) {
hoveredPage.value.classList.remove('page-hovered');
}
// Remove previous page label
removePageLabel(event.target.ownerDocument);
// Add highlight to new page (only if not already selected)
if (foundPage && !selectedPages.value.includes(foundPage)) {
foundPage.classList.add('page-hovered');
createPageLabel(foundPage);
}
hoveredPage.value = foundPage;
}
// If not near page edge, check for content element hover
if (!foundPage) {
const contentElement = getContentElement(event.target);
const doc = event.target.ownerDocument;
if (contentElement !== hoveredElement.value) {
// Remove highlight from previous element (only if not selected)
if (
hoveredElement.value &&
hoveredElement.value !== selectedElement.value
) {
hoveredElement.value.classList.remove('element-hovered');
}
// Remove previous labels
removeElementLabel(doc);
removePageLabel(doc);
// Add highlight to new element (only if not already selected)
if (contentElement && contentElement !== selectedElement.value) {
contentElement.classList.add('element-hovered');
createElementLabel(contentElement);
}
hoveredElement.value = contentElement;
}
} else {
// Clear element hover when hovering page edge
if (
hoveredElement.value &&
hoveredElement.value !== selectedElement.value
) {
hoveredElement.value.classList.remove('element-hovered');
hoveredElement.value = null;
}
// Remove element label when hovering page edge
removeElementLabel(event.target.ownerDocument);
}
};
// Clear selection highlight from all selected pages
const clearSelectedPages = () => {
selectedPages.value.forEach((page) => {
page.classList.remove('page-selected');
});
selectedPages.value = [];
};
// Text elements that can trigger ElementPopup (excluding containers, images, etc.)
const CONTENT_ELEMENTS = [
'P',
'H1',
'H2',
'H3',
'H4',
'H5',
'H6',
'BLOCKQUOTE',
'LI',
'A',
'STRONG',
'EM',
'B',
'I',
'U',
'CODE',
'PRE',
'FIGCAPTION',
];
// Check if element is a content element (or find closest content parent)
const getContentElement = (element) => {
let current = element;
while (current && current.tagName !== 'BODY') {
if (CONTENT_ELEMENTS.includes(current.tagName)) {
return current;
}
current = current.parentElement;
}
return null;
};
// Clear selected element highlight
const clearSelectedElement = () => {
if (selectedElement.value) {
selectedElement.value.classList.remove('element-selected');
const doc = selectedElement.value.ownerDocument;
removeElementLabel(doc);
selectedElement.value = null;
}
};
// Get count of similar elements (same tag)
const getSimilarElementsCount = (element, doc) => {
const tagName = element.tagName;
const allElements = doc.querySelectorAll(tagName);
return allElements.length;
};
// Handle click in iframe
const handleIframeClick = (event) => {
const element = event.target;
// Check if clicking near a page edge
if (hoveredPage.value) {
event.stopPropagation();
// Clear previous selections
clearSelectedPages();
clearSelectedElement();
// Get all pages with same template and highlight them
const doc = event.target.ownerDocument;
const sameTemplatePages = getPagesWithSameTemplate(hoveredPage.value, doc);
sameTemplatePages.forEach((page) => {
page.classList.add('page-selected');
});
selectedPages.value = sameTemplatePages;
// Remove labels when opening popup
removePageLabel(doc);
removeElementLabel(doc);
pagePopup.value.open(hoveredPage.value, event, sameTemplatePages.length);
elementPopup.value.close();
return;
}
// Only show popup for elements inside the page template
const isInsidePage = element.closest('.pagedjs_page');
if (!isInsidePage) {
clearSelectedPages();
clearSelectedElement();
elementPopup.value.close();
pagePopup.value.close();
return;
}
// Only show ElementPopup for content elements, not divs
const contentElement = getContentElement(element);
if (!contentElement) {
clearSelectedPages();
clearSelectedElement();
elementPopup.value.close();
pagePopup.value.close();
return;
}
// Clear page selections
clearSelectedPages();
// If popup is already open and we're clicking another element, close it
if (elementPopup.value.visible) {
clearSelectedElement();
elementPopup.value.close();
pagePopup.value.close();
return;
}
// Clear previous element selection
clearSelectedElement();
// Remove hovered class from the element we're about to select
contentElement.classList.remove('element-hovered');
// Clear the hoveredElement ref if it's the same as what we're selecting
if (hoveredElement.value === contentElement) {
hoveredElement.value = null;
}
// Get document and remove labels when opening popup
const doc = event.target.ownerDocument;
removeElementLabel(doc);
removePageLabel(doc);
// Select the new element
selectedElement.value = contentElement;
contentElement.classList.add('element-selected');
// Get count of similar elements
const count = getSimilarElementsCount(contentElement, doc);
elementPopup.value.handleIframeClick(event, contentElement, count);
pagePopup.value.close();
};
// Expose clearSelectedPages for PagePopup to call when closing
const handlePagePopupClose = () => {
clearSelectedPages();
};
// Handle ElementPopup close
const handleElementPopupClose = () => {
clearSelectedElement();
};
const renderPreview = async (shouldReloadFromFile = false) => {
if (isTransitioning.value) return;
isTransitioning.value = true;
// Determine which iframe is currently visible and which to render to
const visibleFrame =
currentFrameIndex.value === 1 ? previewFrame1.value : previewFrame2.value;
const hiddenFrame =
currentFrameIndex.value === 1 ? previewFrame2.value : previewFrame1.value;
if (!hiddenFrame) {
isTransitioning.value = false;
return;
}
// Save scroll position from visible frame
if (
visibleFrame &&
visibleFrame.contentWindow &&
visibleFrame.contentDocument
) {
const scrollTop = visibleFrame.contentWindow.scrollY || 0;
const scrollHeight =
visibleFrame.contentDocument.documentElement.scrollHeight;
const clientHeight = visibleFrame.contentWindow.innerHeight;
const maxScroll = scrollHeight - clientHeight;
savedScrollPercentage = maxScroll > 0 ? scrollTop / maxScroll : 0;
}
if (shouldReloadFromFile || !stylesheetStore.content) {
await stylesheetStore.loadStylesheet();
}
// Render to the hidden frame
hiddenFrame.srcdoc = `
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="/assets/css/pagedjs-interface.css">
<style id="dynamic-styles">${stylesheetStore.content}</style>
<script src="https://unpkg.com/pagedjs/dist/paged.polyfill.js"><\/script>
</head>
<body>${document.getElementById('content-source').innerHTML}</body>
</html>
`;
hiddenFrame.onload = () => {
// Add event listeners for page and element interactions
hiddenFrame.contentDocument.addEventListener(
'mousemove',
handleIframeMouseMove
);
hiddenFrame.contentDocument.addEventListener('click', handleIframeClick);
// Add keyboard shortcut listener to iframe (for when focus is inside iframe)
hiddenFrame.contentDocument.addEventListener('keydown', handleKeyboardShortcut);
// Close Coloris when clicking in the iframe
hiddenFrame.contentDocument.addEventListener('click', () => {
Coloris.close();
});
// Wait for PagedJS to finish rendering
setTimeout(() => {
// Restore scroll position
const scrollHeight =
hiddenFrame.contentDocument.documentElement.scrollHeight;
const clientHeight = hiddenFrame.contentWindow.innerHeight;
const maxScroll = scrollHeight - clientHeight;
const targetScroll = savedScrollPercentage * maxScroll;
hiddenFrame.contentWindow.scrollTo(0, targetScroll);
// Start crossfade transition
setTimeout(() => {
// Make hidden frame visible (it's already behind)
hiddenFrame.style.opacity = '1';
hiddenFrame.style.zIndex = '1';
// Fade out visible frame
if (visibleFrame) {
visibleFrame.style.opacity = '0';
}
// After fade completes, swap the frames
setTimeout(() => {
if (visibleFrame) {
visibleFrame.style.zIndex = '0';
}
// Swap current frame
currentFrameIndex.value = currentFrameIndex.value === 1 ? 2 : 1;
isTransitioning.value = false;
}, 200); // Match CSS transition duration
}, 50); // Small delay to ensure scroll is set
}, 200); // Wait for PagedJS
};
};
watch(
() => stylesheetStore.content,
() => {
renderPreview();
}
);
// Re-render when narrative data changes
watch(
() => narrativeStore.data,
() => {
if (narrativeStore.data) {
renderPreview();
}
}
);
// Print the PagedJS content
const printPreview = async () => {
const frame = activeFrame.value;
if (!frame || !frame.contentDocument) return;
const doc = frame.contentDocument;
// Collect all styles
let allStyles = '';
// Get inline <style> tags content
doc.querySelectorAll('style').forEach((style) => {
allStyles += style.innerHTML + '\n';
});
// Get rules from stylesheets
for (const sheet of doc.styleSheets) {
try {
for (const rule of sheet.cssRules) {
allStyles += rule.cssText + '\n';
}
} catch (e) {
// Cross-origin stylesheet, try to fetch it
if (sheet.href) {
try {
const response = await fetch(sheet.href);
const css = await response.text();
allStyles += css;
} catch (fetchError) {
console.warn('Could not fetch stylesheet:', sheet.href);
}
}
}
}
// Save current page content
const originalContent = document.body.innerHTML;
const originalStyles = document.head.innerHTML;
// Replace page content with iframe content
document.head.innerHTML = `
<meta charset="UTF-8">
<title>Impression</title>
<style>${allStyles}</style>
`;
document.body.innerHTML = doc.body.innerHTML;
// Print
window.print();
// Restore original content after print dialog closes
setTimeout(() => {
document.head.innerHTML = originalStyles;
document.body.innerHTML = originalContent;
// Re-mount Vue app would be needed, so we reload instead
window.location.reload();
}, 100);
};
// Setup print preview
const { printPreview } = usePrintPreview(activeFrame);
// Setup keyboard shortcuts (depends on printPreview)
const {
handleKeyboardShortcut,
isMac
} = useKeyboardShortcuts({
stylesheetStore,
elementPopup,
pagePopup,
activeTab,
printPreview,
});
// Attach keyboard shortcut handler to renderer
setKeyboardShortcutHandler(handleKeyboardShortcut);
// Lifecycle: Initialize app on mount
onMounted(async () => {
// Load narrative data (narrativeUrl constructed from location, always present)
await narrativeStore.loadNarrative(location.href + '.json');
@ -609,17 +85,9 @@ onMounted(async () => {
await stylesheetStore.initializeFromNarrative(narrativeStore.data);
}
// Add keyboard shortcut listener to document (for when focus is outside iframe)
document.addEventListener('keydown', handleKeyboardShortcut);
// Render preview after data is loaded
renderPreview(true);
});
onUnmounted(() => {
// Clean up keyboard shortcut listener
document.removeEventListener('keydown', handleKeyboardShortcut);
});
</script>
<template>

372
src/composables/useIframeInteractions.js Normal file
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@ -0,0 +1,372 @@
import { ref } from 'vue';
/**
* Composable for managing interactions with pages and elements in the iframe
* Handles hover effects, labels, and click events for both pages and content elements
*/
export function useIframeInteractions({ elementPopup, pagePopup }) {
// Page interaction state
const hoveredPage = ref(null);
const selectedPages = ref([]); // Pages with active border (when popup is open)
const hoveredElement = ref(null); // Currently hovered content element
const selectedElement = ref(null); // Selected element (when popup is open)
const EDGE_THRESHOLD = 30; // px from edge to trigger hover
// Text elements that can trigger ElementPopup (excluding containers, images, etc.)
const CONTENT_ELEMENTS = [
'P',
'H1',
'H2',
'H3',
'H4',
'H5',
'H6',
'BLOCKQUOTE',
'LI',
'A',
'STRONG',
'EM',
'B',
'I',
'U',
'CODE',
'PRE',
'FIGCAPTION',
];
// Check if mouse position is near the edges of a page element
const isNearPageEdge = (pageElement, mouseX, mouseY) => {
const rect = pageElement.getBoundingClientRect();
const nearLeft = mouseX >= rect.left && mouseX <= rect.left + EDGE_THRESHOLD;
const nearRight =
mouseX >= rect.right - EDGE_THRESHOLD && mouseX <= rect.right;
const nearTop = mouseY >= rect.top && mouseY <= rect.top + EDGE_THRESHOLD;
const nearBottom =
mouseY >= rect.bottom - EDGE_THRESHOLD && mouseY <= rect.bottom;
const inHorizontalRange = mouseY >= rect.top && mouseY <= rect.bottom;
const inVerticalRange = mouseX >= rect.left && mouseX <= rect.right;
return (
(nearLeft && inHorizontalRange) ||
(nearRight && inHorizontalRange) ||
(nearTop && inVerticalRange) ||
(nearBottom && inVerticalRange)
);
};
// Get all pages using the same template as the given page
const getPagesWithSameTemplate = (page, doc) => {
const pageType = page.getAttribute('data-page-type') || 'default';
const allPages = doc.querySelectorAll('.pagedjs_page');
return Array.from(allPages).filter(
(p) => (p.getAttribute('data-page-type') || 'default') === pageType
);
};
// Get selector for element (same logic as ElementPopup)
const getSelectorFromElement = (element) => {
if (element.id) {
return `#${element.id}`;
}
const tagName = element.tagName.toLowerCase();
// Filter out state classes (element-hovered, element-selected, page-hovered, page-selected)
const classes = Array.from(element.classList).filter(
(cls) =>
![
'element-hovered',
'element-selected',
'page-hovered',
'page-selected',
].includes(cls)
);
if (classes.length > 0) {
return `${tagName}.${classes[0]}`;
}
return tagName;
};
// Create and position element label on hover
const createElementLabel = (element) => {
const doc = element.ownerDocument;
const existingLabel = doc.querySelector('.element-hover-label');
if (existingLabel) {
existingLabel.remove();
}
const rect = element.getBoundingClientRect();
const scrollTop = doc.documentElement.scrollTop || doc.body.scrollTop;
const scrollLeft = doc.documentElement.scrollLeft || doc.body.scrollLeft;
const label = doc.createElement('div');
label.className = 'element-hover-label';
label.textContent = getSelectorFromElement(element);
label.style.top = `${rect.top + scrollTop - 32}px`;
label.style.left = `${rect.left + scrollLeft}px`;
doc.body.appendChild(label);
return label;
};
// Remove element label
const removeElementLabel = (doc) => {
const label = doc.querySelector('.element-hover-label');
if (label) {
label.remove();
}
};
// Create and position page label on hover
const createPageLabel = (page) => {
const doc = page.ownerDocument;
const existingLabel = doc.querySelector('.page-hover-label');
if (existingLabel) {
existingLabel.remove();
}
const rect = page.getBoundingClientRect();
const scrollTop = doc.documentElement.scrollTop || doc.body.scrollTop;
const scrollLeft = doc.documentElement.scrollLeft || doc.body.scrollLeft;
const templateName = page.getAttribute('data-page-type') || 'default';
const label = doc.createElement('div');
label.className = 'page-hover-label';
label.textContent = `@page ${templateName}`;
label.style.top = `${rect.top + scrollTop - 32}px`;
label.style.left = `${rect.left + scrollLeft}px`;
doc.body.appendChild(label);
return label;
};
// Remove page label
const removePageLabel = (doc) => {
const label = doc.querySelector('.page-hover-label');
if (label) {
label.remove();
}
};
// Check if element is a content element (or find closest content parent)
const getContentElement = (element) => {
let current = element;
while (current && current.tagName !== 'BODY') {
if (CONTENT_ELEMENTS.includes(current.tagName)) {
return current;
}
current = current.parentElement;
}
return null;
};
// Clear selection highlight from all selected pages
const clearSelectedPages = () => {
selectedPages.value.forEach((page) => {
page.classList.remove('page-selected');
});
selectedPages.value = [];
};
// Clear selected element highlight
const clearSelectedElement = () => {
if (selectedElement.value) {
selectedElement.value.classList.remove('element-selected');
const doc = selectedElement.value.ownerDocument;
removeElementLabel(doc);
selectedElement.value = null;
}
};
// Get count of similar elements (same tag)
const getSimilarElementsCount = (element, doc) => {
const tagName = element.tagName;
const allElements = doc.querySelectorAll(tagName);
return allElements.length;
};
// Handle mouse movement in iframe
const handleIframeMouseMove = (event) => {
const pages = event.target.ownerDocument.querySelectorAll('.pagedjs_page');
let foundPage = null;
// Check if hovering near page edge
for (const page of pages) {
if (isNearPageEdge(page, event.clientX, event.clientY)) {
foundPage = page;
break;
}
}
// Update page hover state
if (foundPage !== hoveredPage.value) {
// Remove highlight from previous page (only if not in selectedPages)
if (hoveredPage.value && !selectedPages.value.includes(hoveredPage.value)) {
hoveredPage.value.classList.remove('page-hovered');
}
// Remove previous page label
removePageLabel(event.target.ownerDocument);
// Add highlight to new page (only if not already selected)
if (foundPage && !selectedPages.value.includes(foundPage)) {
foundPage.classList.add('page-hovered');
createPageLabel(foundPage);
}
hoveredPage.value = foundPage;
}
// If not near page edge, check for content element hover
if (!foundPage) {
const contentElement = getContentElement(event.target);
const doc = event.target.ownerDocument;
if (contentElement !== hoveredElement.value) {
// Remove highlight from previous element (only if not selected)
if (
hoveredElement.value &&
hoveredElement.value !== selectedElement.value
) {
hoveredElement.value.classList.remove('element-hovered');
}
// Remove previous labels
removeElementLabel(doc);
removePageLabel(doc);
// Add highlight to new element (only if not already selected)
if (contentElement && contentElement !== selectedElement.value) {
contentElement.classList.add('element-hovered');
createElementLabel(contentElement);
}
hoveredElement.value = contentElement;
}
} else {
// Clear element hover when hovering page edge
if (
hoveredElement.value &&
hoveredElement.value !== selectedElement.value
) {
hoveredElement.value.classList.remove('element-hovered');
hoveredElement.value = null;
}
// Remove element label when hovering page edge
removeElementLabel(event.target.ownerDocument);
}
};
// Handle click in iframe
const handleIframeClick = (event) => {
const element = event.target;
// Check if clicking near a page edge
if (hoveredPage.value) {
event.stopPropagation();
// Clear previous selections
clearSelectedPages();
clearSelectedElement();
// Get all pages with same template and highlight them
const doc = event.target.ownerDocument;
const sameTemplatePages = getPagesWithSameTemplate(hoveredPage.value, doc);
sameTemplatePages.forEach((page) => {
page.classList.add('page-selected');
});
selectedPages.value = sameTemplatePages;
// Remove labels when opening popup
removePageLabel(doc);
removeElementLabel(doc);
pagePopup.value.open(hoveredPage.value, event, sameTemplatePages.length);
elementPopup.value.close();
return;
}
// Only show popup for elements inside the page template
const isInsidePage = element.closest('.pagedjs_page');
if (!isInsidePage) {
clearSelectedPages();
clearSelectedElement();
elementPopup.value.close();
pagePopup.value.close();
return;
}
// Only show ElementPopup for content elements, not divs
const contentElement = getContentElement(element);
if (!contentElement) {
clearSelectedPages();
clearSelectedElement();
elementPopup.value.close();
pagePopup.value.close();
return;
}
// Clear page selections
clearSelectedPages();
// If popup is already open and we're clicking another element, close it
if (elementPopup.value.visible) {
clearSelectedElement();
elementPopup.value.close();
pagePopup.value.close();
return;
}
// Clear previous element selection
clearSelectedElement();
// Remove hovered class from the element we're about to select
contentElement.classList.remove('element-hovered');
// Clear the hoveredElement ref if it's the same as what we're selecting
if (hoveredElement.value === contentElement) {
hoveredElement.value = null;
}
// Get document and remove labels when opening popup
const doc = event.target.ownerDocument;
removeElementLabel(doc);
removePageLabel(doc);
// Select the new element
selectedElement.value = contentElement;
contentElement.classList.add('element-selected');
// Get count of similar elements
const count = getSimilarElementsCount(contentElement, doc);
elementPopup.value.handleIframeClick(event, contentElement, count);
pagePopup.value.close();
};
// Handlers for popup close events
const handlePagePopupClose = () => {
clearSelectedPages();
};
const handleElementPopupClose = () => {
clearSelectedElement();
};
return {
// State
hoveredPage,
selectedPages,
hoveredElement,
selectedElement,
// Handlers
handleIframeMouseMove,
handleIframeClick,
handlePagePopupClose,
handleElementPopupClose,
// Utilities
clearSelectedPages,
clearSelectedElement,
};
}

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import { onMounted, onUnmounted } from 'vue';
/**
* Composable for managing global keyboard shortcuts
* Handles Cmd/Ctrl+S (save), Cmd/Ctrl+P (print), Escape (close popups), \ (toggle panel)
*/
export function useKeyboardShortcuts({
stylesheetStore,
elementPopup,
pagePopup,
activeTab,
printPreview
}) {
// Detect platform for keyboard shortcut display
const isMac = typeof navigator !== 'undefined' && navigator.platform.toUpperCase().indexOf('MAC') >= 0;
// Handle keyboard shortcuts
const handleKeyboardShortcut = (event) => {
// Escape key - close any open popup
if (event.key === 'Escape') {
if (elementPopup.value?.visible) {
elementPopup.value.close();
return;
}
if (pagePopup.value?.visible) {
pagePopup.value.close();
return;
}
}
// Backslash key - toggle editor panel
if (event.key === '\\') {
event.preventDefault();
// Toggle: if panel is closed, open to 'document' tab; if open, close it
activeTab.value = activeTab.value.length > 0 ? '' : 'document';
return;
}
// Cmd+P (Mac) or Ctrl+P (Windows/Linux) - print
if ((event.metaKey || event.ctrlKey) && event.key === 'p') {
event.preventDefault();
printPreview();
return;
}
// Cmd+S (Mac) or Ctrl+S (Windows/Linux) - save
if ((event.metaKey || event.ctrlKey) && event.key === 's') {
event.preventDefault();
// Only save if there are changes and not currently saving
if (stylesheetStore.isDirty && !stylesheetStore.isSaving) {
stylesheetStore.saveCustomCss();
}
}
};
// Attach keyboard listener to iframe document
const attachToIframe = (iframe) => {
if (iframe && iframe.contentDocument) {
iframe.contentDocument.addEventListener('keydown', handleKeyboardShortcut);
}
};
// Setup keyboard listeners on mount
onMounted(() => {
// Add keyboard shortcut listener to document (for when focus is outside iframe)
document.addEventListener('keydown', handleKeyboardShortcut);
});
// Cleanup on unmount
onUnmounted(() => {
// Clean up keyboard shortcut listener
document.removeEventListener('keydown', handleKeyboardShortcut);
});
return {
handleKeyboardShortcut,
attachToIframe,
isMac
};
}

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import { ref, watch } from 'vue';
import Coloris from '@melloware/coloris';
/**
* Composable for managing preview rendering with double buffering
* Handles iframe transitions, scroll persistence, and PagedJS rendering
*/
export function usePreviewRenderer({
previewFrame1,
previewFrame2,
stylesheetStore,
narrativeStore,
handleIframeMouseMove,
handleIframeClick,
}) {
let savedScrollPercentage = 0;
const currentFrameIndex = ref(1); // 1 or 2, which iframe is currently visible
const isTransitioning = ref(false);
let keyboardShortcutHandler = null;
/**
* Render preview to hidden iframe with crossfade transition
*/
const renderPreview = async (shouldReloadFromFile = false) => {
if (isTransitioning.value) return;
isTransitioning.value = true;
// Determine which iframe is currently visible and which to render to
const visibleFrame =
currentFrameIndex.value === 1 ? previewFrame1.value : previewFrame2.value;
const hiddenFrame =
currentFrameIndex.value === 1 ? previewFrame2.value : previewFrame1.value;
if (!hiddenFrame) {
isTransitioning.value = false;
return;
}
// Save scroll position from visible frame
if (
visibleFrame &&
visibleFrame.contentWindow &&
visibleFrame.contentDocument
) {
const scrollTop = visibleFrame.contentWindow.scrollY || 0;
const scrollHeight =
visibleFrame.contentDocument.documentElement.scrollHeight;
const clientHeight = visibleFrame.contentWindow.innerHeight;
const maxScroll = scrollHeight - clientHeight;
savedScrollPercentage = maxScroll > 0 ? scrollTop / maxScroll : 0;
}
if (shouldReloadFromFile || !stylesheetStore.content) {
await stylesheetStore.loadStylesheet();
}
// Render to the hidden frame
hiddenFrame.srcdoc = `
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="/assets/css/pagedjs-interface.css">
<style id="dynamic-styles">${stylesheetStore.content}</style>
<script src="https://unpkg.com/pagedjs/dist/paged.polyfill.js"><\/script>
</head>
<body>${document.getElementById('content-source').innerHTML}</body>
</html>
`;
hiddenFrame.onload = () => {
// Add event listeners for page and element interactions
hiddenFrame.contentDocument.addEventListener(
'mousemove',
handleIframeMouseMove
);
hiddenFrame.contentDocument.addEventListener('click', handleIframeClick);
// Add keyboard shortcut listener to iframe (for when focus is inside iframe)
if (keyboardShortcutHandler) {
hiddenFrame.contentDocument.addEventListener('keydown', keyboardShortcutHandler);
}
// Close Coloris when clicking in the iframe
hiddenFrame.contentDocument.addEventListener('click', () => {
Coloris.close();
});
// Wait for PagedJS to finish rendering
setTimeout(() => {
// Restore scroll position
const scrollHeight =
hiddenFrame.contentDocument.documentElement.scrollHeight;
const clientHeight = hiddenFrame.contentWindow.innerHeight;
const maxScroll = scrollHeight - clientHeight;
const targetScroll = savedScrollPercentage * maxScroll;
hiddenFrame.contentWindow.scrollTo(0, targetScroll);
// Start crossfade transition
setTimeout(() => {
// Make hidden frame visible (it's already behind)
hiddenFrame.style.opacity = '1';
hiddenFrame.style.zIndex = '1';
// Fade out visible frame
if (visibleFrame) {
visibleFrame.style.opacity = '0';
}
// After fade completes, swap the frames
setTimeout(() => {
if (visibleFrame) {
visibleFrame.style.zIndex = '0';
}
// Swap current frame
currentFrameIndex.value = currentFrameIndex.value === 1 ? 2 : 1;
isTransitioning.value = false;
}, 200); // Match CSS transition duration
}, 50); // Small delay to ensure scroll is set
}, 200); // Wait for PagedJS
};
};
// Watch for stylesheet changes and re-render
watch(
() => stylesheetStore.content,
() => {
renderPreview();
}
);
// Re-render when narrative data changes
watch(
() => narrativeStore.data,
() => {
if (narrativeStore.data) {
renderPreview();
}
}
);
/**
* Set the keyboard shortcut handler (called after keyboard shortcuts composable is initialized)
*/
const setKeyboardShortcutHandler = (handler) => {
keyboardShortcutHandler = handler;
};
return {
renderPreview,
currentFrameIndex,
isTransitioning,
setKeyboardShortcutHandler,
};
}

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/**
* Composable for handling print preview functionality
* Collects styles from iframe and triggers browser print dialog
*/
export function usePrintPreview(activeFrame) {
/**
* Print the PagedJS content from the active frame
*/
const printPreview = async () => {
const frame = activeFrame.value;
if (!frame || !frame.contentDocument) return;
const doc = frame.contentDocument;
// Collect all styles
let allStyles = '';
// Get inline <style> tags content
doc.querySelectorAll('style').forEach((style) => {
allStyles += style.innerHTML + '\n';
});
// Get rules from stylesheets
for (const sheet of doc.styleSheets) {
try {
for (const rule of sheet.cssRules) {
allStyles += rule.cssText + '\n';
}
} catch (e) {
// Cross-origin stylesheet, try to fetch it
if (sheet.href) {
try {
const response = await fetch(sheet.href);
const css = await response.text();
allStyles += css;
} catch (fetchError) {
console.warn('Could not fetch stylesheet:', sheet.href);
}
}
}
}
// Save current page content
const originalContent = document.body.innerHTML;
const originalStyles = document.head.innerHTML;
// Replace page content with iframe content
document.head.innerHTML = `
<meta charset="UTF-8">
<title>Impression</title>
<style>${allStyles}</style>
`;
document.body.innerHTML = doc.body.innerHTML;
// Print
window.print();
// Restore original content after print dialog closes
setTimeout(() => {
document.head.innerHTML = originalStyles;
document.body.innerHTML = originalContent;
// Re-mount Vue app would be needed, so we reload instead
window.location.reload();
}, 100);
};
return {
printPreview
};
}