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Chore: add useZoom button to control zooming of the canvas from outsi…
…de using the hook quicker
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105 changes: 105 additions & 0 deletions
105
packages/react-filerobot-image-editor/src/hooks/useZoom.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| /** External Dependencies */ | ||
| import { useState } from 'react'; | ||
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| /** Internal Dependencies */ | ||
| import { ZOOM_CANVAS } from 'actions'; | ||
| import getZoomFitFactor from 'utils/getZoomFitFactor'; | ||
| import { DEFAULT_ZOOM_FACTOR, TOOLS_IDS } from 'utils/constants'; | ||
| import toPrecisedFloat from 'utils/toPrecisedFloat'; | ||
| import useStore from './useStore'; | ||
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| const MULTIPLY_ZOOM_FACTOR = 1.1; | ||
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| const useZoom = () => { | ||
| const { | ||
| dispatch, | ||
| zoom = {}, | ||
| toolId, | ||
| feedback, | ||
| shownImageDimensions, | ||
| resize, | ||
| originalSource, | ||
| adjustments: { crop }, | ||
| } = useStore(); | ||
| const isBlockerError = feedback.duration === 0; | ||
| const [zoomingMenuAnchorEl, setZoomingMenuAnchorEl] = useState(null); | ||
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| const saveZoom = (zoomFactor, isAbsoluteZoom, zoomCustomLabel) => { | ||
| dispatch({ | ||
| type: ZOOM_CANVAS, | ||
| payload: { | ||
| factor: zoomFactor, | ||
| isAbsoluteZoom, | ||
| customLabel: zoomCustomLabel, | ||
| }, | ||
| }); | ||
| }; | ||
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| const zoomIn = () => { | ||
| saveZoom(zoom.factor * MULTIPLY_ZOOM_FACTOR); | ||
| }; | ||
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| const fitCanvas = () => { | ||
| const usedAsOrgDimens = | ||
| (resize.width && resize.height && resize) || | ||
| (crop.width && crop.height && crop) || | ||
| shownImageDimensions; | ||
| const fitCanvasFactor = getZoomFitFactor( | ||
| (crop.width && crop.height && crop) || shownImageDimensions, | ||
| usedAsOrgDimens, | ||
| ); | ||
| saveZoom(fitCanvasFactor || DEFAULT_ZOOM_FACTOR, true); | ||
| }; | ||
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| const zoomOut = () => { | ||
| saveZoom(zoom.factor / MULTIPLY_ZOOM_FACTOR); | ||
| }; | ||
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| const toggleZoomingMenu = (event) => { | ||
| setZoomingMenuAnchorEl(zoomingMenuAnchorEl || !event ? null : event.target); | ||
| }; | ||
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| const applyZoomFactorPreset = (factor, zoomCustomLabel) => { | ||
| if (factor === 'fit') { | ||
| fitCanvas(); | ||
| toggleZoomingMenu(); | ||
| return; | ||
| } | ||
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| const factorToAchieveSelected = | ||
| resize.width || resize.height | ||
| ? factor | ||
| : factor / shownImageDimensions.originalSourceInitialScale; | ||
| saveZoom(factorToAchieveSelected, true, zoomCustomLabel); | ||
| toggleZoomingMenu(); | ||
| }; | ||
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| const getPreviewedZoomLevelLabel = () => { | ||
| if (zoom.customLabel) { | ||
| return zoom.customLabel; | ||
| } | ||
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| const previewToRealImgFactor = | ||
| originalSource && !resize.width && !resize.height | ||
| ? shownImageDimensions.originalSourceInitialScale * zoom.factor | ||
| : zoom.factor; | ||
| return `${toPrecisedFloat(previewToRealImgFactor * 100, 0) || '100'}%`; | ||
| }; | ||
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| const isZoomDisabled = toolId === TOOLS_IDS.CROP || isBlockerError; | ||
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| return { | ||
| applyZoomFactorPreset, | ||
| getPreviewedZoomLevelLabel, | ||
| isZoomDisabled, | ||
| fitCanvas, | ||
| zoomIn, | ||
| zoomOut, | ||
| saveZoom, | ||
| toggleZoomingMenu, | ||
| zoomingMenuAnchorEl, | ||
| setZoomingMenuAnchorEl, | ||
| }; | ||
| }; | ||
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| export default useZoom; |