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import { canRegenerateImage } from './utils/canRegenerateImage';
import { checkIfImageWasResized, isASmallImage } from './utils/imageEditUtils';
import { createImageWrapper } from './utils/createImageWrapper';
import { Cropper } from './Cropper/cropperContext';
import { EDITING_MARKER, findEditingImage } from './utils/findEditingImage';
import { filterInnerResizerHandles } from './utils/filterInnerResizerHandles';
import { getDropAndDragHelpers } from './utils/getDropAndDragHelpers';
import { getHTMLImageOptions } from './utils/getHTMLImageOptions';
import { getSelectedImage } from './utils/getSelectedImage';
import { getSelectedImageMetadata, updateImageEditInfo } from './utils/updateImageEditInfo';
import { ImageEditElementClass } from './types/ImageEditElementClass';
import { normalizeImageSelection } from './utils/normalizeImageSelection';
import { Resizer } from './Resizer/resizerContext';
import { Rotator } from './Rotator/rotatorContext';
import { updateHandleCursor } from './utils/updateHandleCursor';
import { updateRotateHandle } from './Rotator/updateRotateHandle';
import { updateWrapper } from './utils/updateWrapper';
import {
ChangeSource,
getSafeIdSelector,
getSelectedParagraphs,
isElementOfType,
isNodeOfType,
mutateBlock,
mutateSegment,
setImageState,
unwrap,
} from 'roosterjs-content-model-dom';
import type { DragAndDropHelper } from '../pluginUtils/DragAndDrop/DragAndDropHelper';
import type { DragAndDropContext } from './types/DragAndDropContext';
import type { ImageHtmlOptions } from './types/ImageHtmlOptions';
import type { ImageEditOptions } from './types/ImageEditOptions';
import type {
ContentChangedEvent,
ContentModelImage,
EditorPlugin,
IEditor,
ImageEditOperation,
ImageEditor,
ImageMetadataFormat,
KeyDownEvent,
MouseDownEvent,
MouseUpEvent,
PluginEvent,
} from 'roosterjs-content-model-types';
const DefaultOptions: Partial<ImageEditOptions> = {
borderColor: '#DB626C',
minWidth: 10,
minHeight: 10,
preserveRatio: true,
disableRotate: false,
disableSideResize: false,
onSelectState: ['resize', 'rotate'],
};
const MouseRightButton = 2;
const DRAG_ID = '_dragging';
const IMAGE_EDIT_CLASS = 'imageEdit';
const IMAGE_EDIT_CLASS_CARET = 'imageEditCaretColor';
const IMAGE_EDIT_FORMAT_EVENT = 'ImageEditEvent';
/**
* ImageEdit plugin handles the following image editing features:
* - Resize image
* - Crop image
* - Rotate image
* - Flip image
*/
export class ImageEditPlugin implements ImageEditor, EditorPlugin {
protected editor: IEditor | null = null;
private shadowSpan: HTMLSpanElement | null = null;
private selectedImage: HTMLImageElement | null = null;
protected wrapper: HTMLSpanElement | null = null;
protected imageEditInfo: ImageMetadataFormat | null = null;
private imageHTMLOptions: ImageHtmlOptions | null = null;
private dndHelpers: DragAndDropHelper<DragAndDropContext, any>[] = [];
private clonedImage: HTMLImageElement | null = null;
private lastSrc: string | null = null;
private wasImageResized: boolean = false;
private isCropMode: boolean = false;
private resizers: HTMLDivElement[] = [];
private rotators: HTMLDivElement[] = [];
private croppers: HTMLDivElement[] = [];
private zoomScale: number = 1;
private disposer: (() => void) | null = null;
protected isEditing = false;
protected options: ImageEditOptions;
constructor(options?: ImageEditOptions) {
this.options = { ...DefaultOptions, ...options };
}
/**
* Get name of this plugin
*/
getName() {
return 'ImageEdit';
}
/**
* The first method that editor will call to a plugin when editor is initializing.
* It will pass in the editor instance, plugin should take this chance to save the
* editor reference so that it can call to any editor method or format API later.
* @param editor The editor object
*/
initialize(editor: IEditor) {
this.editor = editor;
this.disposer = editor.attachDomEvent({
blur: {
beforeDispatch: () => {
if (this.isEditing && this.editor && !this.editor.isDisposed()) {
this.applyFormatWithContentModel(
this.editor,
this.isCropMode,
true /* shouldSelectImage */
);
}
},
},
dragstart: {
beforeDispatch: ev => {
Eif (this.editor) {
const target = ev.target as Node;
Eif (this.isImageSelection(target)) {
target.id = target.id + DRAG_ID;
}
}
},
},
dragend: {
beforeDispatch: ev => {
Eif (this.editor) {
const target = ev.target as Node;
Eif (this.isImageSelection(target) && target.id.includes(DRAG_ID)) {
target.id = target.id.replace(DRAG_ID, '').trim();
}
}
},
},
});
}
/**
* The last method that editor will call to a plugin before it is disposed.
* Plugin can take this chance to clear the reference to editor. After this method is
* called, plugin should not call to any editor method since it will result in error.
*/
dispose() {
if (this.disposer) {
this.disposer();
this.disposer = null;
}
this.isEditing = false;
this.cleanInfo();
this.editor = null;
}
/**
* Core method for a plugin. Once an event happens in editor, editor will call this
* method of each plugin to handle the event as long as the event is not handled
* exclusively by another plugin.
* @param event The event to handle:
*/
onPluginEvent(event: PluginEvent) {
if (!this.editor) {
return;
}
switch (event.eventType) {
case 'mouseDown':
this.mouseDownHandler(this.editor, event);
break;
case 'mouseUp':
this.mouseUpHandler(this.editor, event);
break;
case 'keyDown':
this.keyDownHandler(this.editor, event);
break;
case 'contentChanged':
this.contentChangedHandler(this.editor, event);
break;
case 'extractContentWithDom':
this.removeImageEditing(event.clonedRoot);
break;
case 'beforeLogicalRootChange':
this.handleBeforeLogicalRootChange();
break;
}
}
private handleBeforeLogicalRootChange() {
if (this.isEditing && this.editor && !this.editor.isDisposed()) {
this.applyFormatWithContentModel(
this.editor,
this.isCropMode,
false /* shouldSelectImage */
);
this.removeImageWrapper();
this.cleanInfo();
}
}
private removeImageEditing(clonedRoot: HTMLElement) {
const images = clonedRoot.querySelectorAll('img');
images.forEach(image => {
Eif (image.dataset.editingInfo) {
delete image.dataset.editingInfo;
}
});
}
private isImageSelection(target: Node): target is HTMLElement {
return (
isNodeOfType(target, 'ELEMENT_NODE') &&
(isElementOfType(target, 'img') ||
!!(
isElementOfType(target, 'span') &&
target.firstElementChild &&
isNodeOfType(target.firstElementChild, 'ELEMENT_NODE') &&
isElementOfType(target.firstElementChild, 'img')
))
);
}
private mouseUpHandler(editor: IEditor, event: MouseUpEvent) {
const selection = editor.getDOMSelection();
Eif ((selection && selection.type == 'image') || this.isEditing) {
const shouldSelectImage =
this.isImageSelection(event.rawEvent.target as Node) &&
event.rawEvent.button === MouseRightButton;
this.applyFormatWithContentModel(editor, this.isCropMode, shouldSelectImage);
}
}
private mouseDownHandler(editor: IEditor, event: MouseDownEvent) {
if (
this.isEditing &&
this.isImageSelection(event.rawEvent.target as Node) &&
event.rawEvent.button !== MouseRightButton &&
!this.isCropMode
) {
this.applyFormatWithContentModel(editor, this.isCropMode);
}
}
private onDropHandler(editor: IEditor) {
const selection = editor.getDOMSelection();
Eif (selection?.type == 'image') {
editor.formatContentModel(model => {
const imageDragged = findEditingImage(model, selection.image.id);
const imageDropped = findEditingImage(
model,
selection.image.id.replace(DRAG_ID, '').trim()
);
Eif (imageDragged && imageDropped) {
const draggedIndex = imageDragged.paragraph.segments.indexOf(
imageDragged.image
);
mutateBlock(imageDragged.paragraph).segments.splice(draggedIndex, 1);
const segment = imageDropped.image;
const paragraph = imageDropped.paragraph;
mutateSegment(paragraph, segment, image => {
image.isSelected = true;
image.isSelectedAsImageSelection = true;
});
return true;
}
return false;
});
}
}
private keyDownHandler(editor: IEditor, event: KeyDownEvent) {
Eif (this.isEditing) {
if (
event.rawEvent.key === 'Escape' ||
event.rawEvent.key === 'Delete' ||
event.rawEvent.key === 'Backspace'
) {
Iif (event.rawEvent.key === 'Escape') {
this.removeImageWrapper();
}
this.cleanInfo();
} else {
if (event.rawEvent.key == 'Enter' && this.isCropMode) {
event.rawEvent.preventDefault();
}
this.applyFormatWithContentModel(
editor,
this.isCropMode,
true /** should selectImage */,
false /* isApiOperation */
);
}
}
}
private setContentHandler(editor: IEditor) {
const selection = editor.getDOMSelection();
Eif (selection?.type == 'image') {
this.cleanInfo();
setImageState(selection.image, '');
this.isEditing = false;
this.isCropMode = false;
}
}
private formatEventHandler(event: ContentChangedEvent) {
if (this.isEditing && event.formatApiName !== IMAGE_EDIT_FORMAT_EVENT) {
this.cleanInfo();
this.isEditing = false;
this.isCropMode = false;
}
}
private contentChangedHandler(editor: IEditor, event: ContentChangedEvent) {
switch (event.source) {
case ChangeSource.SetContent:
this.setContentHandler(editor);
break;
case ChangeSource.Format:
this.formatEventHandler(event);
break;
case ChangeSource.Drop:
this.onDropHandler(editor);
break;
}
}
/**
* EXPOSED FOR TESTING PURPOSE ONLY
*/
protected applyFormatWithContentModel(
editor: IEditor,
isCropMode: boolean,
shouldSelectImage?: boolean,
isApiOperation?: boolean
) {
let editingImageModel: ContentModelImage | undefined;
const selection = editor.getDOMSelection();
let isRTL: boolean = false;
editor.formatContentModel(
(model, context) => {
const editingImage = getSelectedImage(model);
const previousSelectedImage = isApiOperation
? editingImage
: findEditingImage(model);
let result = false;
// Skip adding undo snapshot for now. If we detect any changes later, we will reset it
context.skipUndoSnapshot = 'SkipAll';
Eif (
shouldSelectImage ||
previousSelectedImage?.image != editingImage?.image ||
previousSelectedImage?.image.format.imageState == EDITING_MARKER ||
isApiOperation
) {
const { lastSrc, selectedImage, imageEditInfo, clonedImage } = this;
if (
(this.isEditing || isApiOperation) &&
previousSelectedImage &&
lastSrc &&
selectedImage &&
imageEditInfo &&
clonedImage
) {
mutateSegment(
previousSelectedImage.paragraph,
previousSelectedImage.image,
image => {
const changeState = applyChange(
editor,
selectedImage,
image,
imageEditInfo,
lastSrc,
this.wasImageResized || this.isCropMode,
clonedImage
);
if (this.wasImageResized || changeState == 'FullyChanged') {
context.skipUndoSnapshot = false;
}
const isSameImage =
previousSelectedImage?.image === editingImage?.image;
image.isSelected = isSameImage || shouldSelectImage;
image.isSelectedAsImageSelection = isSameImage || shouldSelectImage;
image.format.imageState = undefined;
Iif (selection?.type == 'range' && !selection.range.collapsed) {
const selectedParagraphs = getSelectedParagraphs(model, true);
const isImageInRange = selectedParagraphs.some(paragraph =>
paragraph.segments.includes(image)
);
if (isImageInRange) {
image.isSelected = true;
}
}
}
);
if (shouldSelectImage) {
normalizeImageSelection(previousSelectedImage);
}
this.cleanInfo();
result = true;
}
this.isEditing = false;
this.isCropMode = false;
if (
editingImage &&
selection?.type == 'image' &&
!shouldSelectImage &&
!isApiOperation
) {
this.isEditing = true;
this.isCropMode = isCropMode;
mutateSegment(editingImage.paragraph, editingImage.image, image => {
editingImageModel = image;
isRTL = editingImage.paragraph.format.direction == 'rtl';
this.imageEditInfo = updateImageEditInfo(image, selection.image);
image.format.imageState = 'isEditing';
});
result = true;
}
}
return result;
},
{
onNodeCreated: (model, node) => {
if (
!isApiOperation &&
editingImageModel &&
editingImageModel == model &&
editingImageModel.format.imageState == EDITING_MARKER &&
isNodeOfType(node, 'ELEMENT_NODE') &&
isElementOfType(node, 'img')
) {
Iif (isCropMode) {
this.startCropMode(editor, node, isRTL);
} else {
this.startRotateAndResize(editor, node, isRTL);
}
}
},
apiName: IMAGE_EDIT_FORMAT_EVENT,
},
{
tryGetFromCache: true,
}
);
}
private startEditing(
editor: IEditor,
image: HTMLImageElement,
apiOperation: ImageEditOperation[]
) {
if (!this.imageEditInfo) {
this.imageEditInfo = getSelectedImageMetadata(editor, image);
}
if (
(this.imageEditInfo.widthPx == 0 || this.imageEditInfo.heightPx == 0) &&
!image.complete
) {
// Image dimensions are zero and loading is incomplete, wait for image to load.
image.onload = () => {
this.updateImageDimensionsIfZero(image);
this.startEditingInternal(editor, image, apiOperation);
image.onload = null;
image.onerror = null;
};
image.onerror = () => {
image.onload = null;
image.onerror = null;
};
} else {
this.updateImageDimensionsIfZero(image);
this.startEditingInternal(editor, image, apiOperation);
}
}
private updateImageDimensionsIfZero(image: HTMLImageElement) {
if (this.imageEditInfo?.widthPx === 0 || this.imageEditInfo?.heightPx === 0) {
this.imageEditInfo.widthPx = image.clientWidth;
this.imageEditInfo.heightPx = image.clientHeight;
}
}
private startEditingInternal(
editor: IEditor,
image: HTMLImageElement,
apiOperation: ImageEditOperation[]
) {
Iif (!this.imageEditInfo) {
this.imageEditInfo = getSelectedImageMetadata(editor, image);
}
this.imageHTMLOptions = getHTMLImageOptions(editor, this.options, this.imageEditInfo);
this.lastSrc = image.getAttribute('src');
const {
resizers,
rotators,
wrapper,
shadowSpan,
imageClone,
croppers,
} = createImageWrapper(
editor,
image,
this.options,
this.imageEditInfo,
this.imageHTMLOptions,
apiOperation
);
this.shadowSpan = shadowSpan;
this.selectedImage = image;
this.wrapper = wrapper;
this.clonedImage = imageClone;
this.wasImageResized = checkIfImageWasResized(image);
this.resizers = resizers;
this.rotators = rotators;
this.croppers = croppers;
this.zoomScale = editor.getDOMHelper().calculateZoomScale();
editor.setEditorStyle(IMAGE_EDIT_CLASS, `outline-style:none!important;`, [
`span:has(>img${getSafeIdSelector(this.selectedImage.id)})`,
]);
editor.setEditorStyle(IMAGE_EDIT_CLASS_CARET, `caret-color: transparent;`);
}
public startRotateAndResize(editor: IEditor, image: HTMLImageElement, isRTL: boolean) {
Eif (this.imageEditInfo) {
this.startEditing(editor, image, ['resize', 'rotate']);
if (this.selectedImage && this.imageEditInfo && this.wrapper && this.clonedImage) {
const isMobileOrTable = !!editor.getEnvironment().isMobileOrTablet;
this.dndHelpers = [
...getDropAndDragHelpers(
this.wrapper,
this.imageEditInfo,
this.options,
ImageEditElementClass.ResizeHandle,
Resizer,
() => {
if (
this.imageEditInfo &&
this.selectedImage &&
this.wrapper &&
this.clonedImage
) {
updateWrapper(
this.imageEditInfo,
this.options,
this.selectedImage,
this.clonedImage,
this.wrapper,
this.resizers,
undefined /* croppers */,
isRTL
);
this.wasImageResized = true;
}
},
this.zoomScale,
isMobileOrTable
),
...getDropAndDragHelpers(
this.wrapper,
this.imageEditInfo,
this.options,
ImageEditElementClass.RotateHandle,
Rotator,
() => {
if (
this.imageEditInfo &&
this.selectedImage &&
this.wrapper &&
this.clonedImage
) {
updateWrapper(
this.imageEditInfo,
this.options,
this.selectedImage,
this.clonedImage,
this.wrapper,
undefined /* resizers */,
undefined /* croppers */,
isRTL,
true /* isRotating */
);
this.updateRotateHandleState(
editor,
this.selectedImage,
this.wrapper,
this.rotators,
this.imageEditInfo?.angleRad,
!!this.options?.disableSideResize
);
this.updateResizeHandleDirection(
this.resizers,
this.imageEditInfo.angleRad
);
}
},
this.zoomScale,
isMobileOrTable
),
];
updateWrapper(
this.imageEditInfo,
this.options,
this.selectedImage,
this.clonedImage,
this.wrapper,
this.resizers,
undefined /* croppers */,
isRTL
);
this.updateRotateHandleState(
editor,
this.selectedImage,
this.wrapper,
this.rotators,
this.imageEditInfo?.angleRad,
!!this.options?.disableSideResize
);
}
}
}
private updateResizeHandleDirection(resizers: HTMLDivElement[], angleRad: number | undefined) {
const resizeHandles = filterInnerResizerHandles(resizers);
if (angleRad !== undefined) {
updateHandleCursor(resizeHandles, angleRad);
}
}
private updateRotateHandleState(
editor: IEditor,
image: HTMLImageElement,
wrapper: HTMLSpanElement,
rotators: HTMLDivElement[],
angleRad: number | undefined,
disableSideResize: boolean
) {
const viewport = editor.getVisibleViewport();
const smallImage = isASmallImage(image.width, image.height);
Eif (viewport && rotators && rotators.length > 0) {
const rotator = rotators[0];
const rotatorHandle = rotator.firstElementChild;
Eif (
isNodeOfType(rotatorHandle, 'ELEMENT_NODE') &&
isElementOfType(rotatorHandle, 'div')
) {
updateRotateHandle(
viewport,
angleRad ?? 0,
wrapper,
rotator,
rotatorHandle,
smallImage,
disableSideResize
);
}
}
}
public isOperationAllowed(operation: ImageEditOperation): boolean {
return (
operation === 'resize' ||
operation === 'rotate' ||
operation === 'flip' ||
operation === 'crop'
);
}
public canRegenerateImage(image: HTMLImageElement): boolean {
return canRegenerateImage(image);
}
private startCropMode(editor: IEditor, image: HTMLImageElement, isRTL: boolean) {
if (this.imageEditInfo) {
this.startEditing(editor, image, ['crop']);
if (this.imageEditInfo && this.selectedImage && this.wrapper && this.clonedImage) {
this.dndHelpers = [
...getDropAndDragHelpers(
this.wrapper,
this.imageEditInfo,
this.options,
ImageEditElementClass.CropHandle,
Cropper,
() => {
if (
this.imageEditInfo &&
this.selectedImage &&
this.wrapper &&
this.clonedImage
) {
updateWrapper(
this.imageEditInfo,
this.options,
this.selectedImage,
this.clonedImage,
this.wrapper,
undefined /* resizers */,
this.croppers,
isRTL
);
this.isCropMode = true;
}
},
this.zoomScale,
!!editor.getEnvironment().isMobileOrTablet
),
];
updateWrapper(
this.imageEditInfo,
this.options,
this.selectedImage,
this.clonedImage,
this.wrapper,
undefined /* resizers */,
this.croppers,
isRTL
);
}
}
}
public cropImage() {
Iif (!this.editor) {
return;
}
Eif (!this.editor.getEnvironment().isSafari) {
this.editor.focus(); // Safari will keep the selection when click crop, then the focus() call should not be called
}
const selection = this.editor.getDOMSelection();
Eif (selection?.type == 'image') {
this.applyFormatWithContentModel(
this.editor,
true /* isCropMode */,
false /* shouldSelectImage */
);
}
}
private editImage(
editor: IEditor,
image: HTMLImageElement,
apiOperation: ImageEditOperation[],
operation: (imageEditInfo: ImageMetadataFormat) => void
) {
this.startEditing(editor, image, apiOperation);
if (!this.selectedImage || !this.imageEditInfo || !this.wrapper || !this.clonedImage) {
return;
}
operation(this.imageEditInfo);
updateWrapper(
this.imageEditInfo,
this.options,
this.selectedImage,
this.clonedImage,
this.wrapper
);
this.applyFormatWithContentModel(
editor,
false /* isCrop */,
true /* shouldSelect*/,
true /* isApiOperation */
);
}
/**
* Exported for testing purpose only
*/
public cleanInfo() {
this.editor?.setEditorStyle(IMAGE_EDIT_CLASS, null);
this.editor?.setEditorStyle(IMAGE_EDIT_CLASS_CARET, null);
this.selectedImage = null;
this.shadowSpan = null;
this.wrapper = null;
this.imageEditInfo = null;
this.imageHTMLOptions = null;
this.dndHelpers.forEach(helper => helper.dispose());
this.dndHelpers = [];
this.clonedImage = null;
this.lastSrc = null;
this.wasImageResized = false;
this.isCropMode = false;
this.resizers = [];
this.rotators = [];
this.croppers = [];
}
private removeImageWrapper() {
let image: HTMLImageElement | null = null;
if (this.shadowSpan && this.shadowSpan.parentElement) {
if (
this.shadowSpan.firstElementChild &&
isNodeOfType(this.shadowSpan.firstElementChild, 'ELEMENT_NODE') &&
isElementOfType(this.shadowSpan.firstElementChild, 'img')
) {
image = this.shadowSpan.firstElementChild;
}
unwrap(this.shadowSpan);
this.shadowSpan = null;
this.wrapper = null;
}
return image;
}
public flipImage(direction: 'horizontal' | 'vertical') {
const selection = this.editor?.getDOMSelection();
Iif (!this.editor || !selection || selection.type !== 'image') {
return;
}
const image = selection.image;
Eif (this.editor) {
this.editImage(this.editor, image, ['flip'], imageEditInfo => {
const angleRad = imageEditInfo.angleRad || 0;
const isInVerticalPostion =
(angleRad >= Math.PI / 2 && angleRad < (3 * Math.PI) / 4) ||
(angleRad <= -Math.PI / 2 && angleRad > (-3 * Math.PI) / 4);
Iif (isInVerticalPostion) {
if (direction === 'horizontal') {
imageEditInfo.flippedVertical = !imageEditInfo.flippedVertical;
} else {
imageEditInfo.flippedHorizontal = !imageEditInfo.flippedHorizontal;
}
} else {
Iif (direction === 'vertical') {
imageEditInfo.flippedVertical = !imageEditInfo.flippedVertical;
} else {
imageEditInfo.flippedHorizontal = !imageEditInfo.flippedHorizontal;
}
}
});
}
}
public rotateImage(angleRad: number) {
const selection = this.editor?.getDOMSelection();
Iif (!this.editor || !selection || selection.type !== 'image') {
return;
}
const image = selection.image;
Eif (this.editor) {
this.editImage(this.editor, image, [], imageEditInfo => {
imageEditInfo.angleRad = (imageEditInfo.angleRad || 0) + angleRad;
});
}
}
}
|