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fix: fit to siaze #13

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Merged
vitormattos merged 1 commit into from
Jan 19, 2026
Merged

fix: fit to siaze #13

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58 changes: 51 additions & 7 deletions src/components/PDFElements.vue
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Original file line number Diff line number Diff line change
Expand Up @@ -213,6 +213,7 @@ export default {
boundHandleWheel: null,
debouncedApplyZoom: null,
visualScale: this.initialScale,
resizeObserver: null,
}
},
mounted() {
Expand All @@ -230,6 +231,14 @@ export default {
this.$el?.addEventListener('wheel', this.boundHandleWheel, { passive: false })
if (this.autoFitZoom) {
window.addEventListener('resize', this.adjustZoomToFit)
if (typeof ResizeObserver !== 'undefined') {
this.resizeObserver = new ResizeObserver(() => {
this.scheduleAutoFitZoom()
})
if (this.$el) {
this.resizeObserver.observe(this.$el)
}
}
}
},
beforeUnmount() {
Expand All @@ -250,6 +259,10 @@ export default {
this.$el?.removeEventListener('scroll', this.onViewportScroll)
if (this.autoFitZoom) {
window.removeEventListener('resize', this.adjustZoomToFit)
if (this.resizeObserver) {
this.resizeObserver.disconnect()
this.resizeObserver = null
}
}
if (this.viewportRafId) {
window.cancelAnimationFrame(this.viewportRafId)
Expand All @@ -274,8 +287,16 @@ export default {
}

const pages = []
const pageWidths = Array(pdfDoc.numPages).fill(0)
for (let p = 1; p <= pdfDoc.numPages; p++) {
pages.push(pdfDoc.getPage(p))
const pagePromise = pdfDoc.getPage(p)
pagePromise.then((page) => {
pageWidths[p - 1] = page.getViewport({ scale: 1 }).width
if (this.autoFitZoom) {
this.scheduleAutoFitZoom()
}
})
pages.push(pagePromise)
}

docs.push({
Expand All @@ -284,6 +305,7 @@ export default {
pdfDoc,
numPages: pdfDoc.numPages,
pages,
pageWidths,
pagesScale: Array(pdfDoc.numPages).fill(this.scale),
allObjects: Array(pdfDoc.numPages).fill(0).map(() => []),
})
Expand All @@ -296,7 +318,7 @@ export default {
this.$emit('pdf-elements:end-init', { docsCount: docs.length })
this.$nextTick(() => {
if (this.autoFitZoom) {
this.adjustZoomToFit()
this.scheduleAutoFitZoom()
}
})
}
Expand Down Expand Up @@ -798,6 +820,9 @@ export default {
if (docIndex < 0 || docIndex >= this.pdfDocuments.length) return
this.pdfDocuments[docIndex].pagesScale[pageIndex] = e.scale
this.cachePageBounds()
if (this.autoFitZoom) {
this.scheduleAutoFitZoom()
}
},

formatPageNumber(currentPage, totalPages) {
Expand Down Expand Up @@ -826,15 +851,34 @@ export default {
const availableWidth = containerWidth - 40
return Math.max(0.1, Math.min(2, availableWidth / maxPageWidth))
},
scheduleAutoFitZoom() {
if (this.zoomRafId) return
this.zoomRafId = window.requestAnimationFrame(() => {
this.zoomRafId = 0
this.adjustZoomToFit()
})
},
adjustZoomToFit() {
if (!this.autoFitZoom || !this.pdfDocuments.length) return

const canvases = this.$el?.querySelectorAll('canvas')
if (!canvases?.length) return
const widths = this.pdfDocuments
.flatMap(doc => doc.pageWidths || [])
.filter(width => width > 0)

const maxCanvasWidth = Math.max(...Array.from(canvases).map(canvas =>
canvas.width / (this.scale || 1),
))
let maxCanvasWidth = 0
if (widths.length) {
maxCanvasWidth = Math.max(...widths)
} else {
if (this.autoFitZoom) {
this.scheduleAutoFitZoom()
return
}
const canvases = this.$el?.querySelectorAll('canvas')
if (!canvases?.length) return
maxCanvasWidth = Math.max(...Array.from(canvases).map(canvas =>
canvas.width / (this.scale || 1),
))
}

const optimalScale = this.calculateOptimalScale(maxCanvasWidth)
if (Math.abs(optimalScale - this.scale) > 0.01) {
Expand Down