matrix-react-sdk
Version:
SDK for matrix.org using React
244 lines (206 loc) • 23.7 kB
JavaScript
"use strict";
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _lodash = require("lodash");
/*
Copyright 2018 - 2020 The Matrix.org Foundation C.I.C.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
class Resizer
/*:: <C extends IConfig = IConfig>*/
{
// TODO move vertical/horizontal to config option/container class
// as it doesn't make sense to mix them within one container/Resizer
constructor(container
/*: HTMLElement*/
, distributorCtor
/*: {
new(item: ResizeItem): FixedDistributor<C, any>;
createItem(resizeHandle: HTMLDivElement, resizer: Resizer, sizer: Sizer): ResizeItem;
createSizer(containerElement: HTMLElement, vertical: boolean, reverse: boolean): Sizer;
}*/
, config
/*:: ?: C*/
) {
this.container
/*:: */
= container
/*:: */
;
this.distributorCtor
/*:: */
= distributorCtor
/*:: */
;
this.config
/*:: ?*/
= config
/*:: ?*/
;
(0, _defineProperty2.default)(this, "classNames", void 0);
(0, _defineProperty2.default)(this, "onMouseDown", (event
/*: MouseEvent*/
) => {
// use closest in case the resize handle contains
// child dom nodes that can be the target
const resizeHandle = event.target && event.target.closest(`.${this.classNames.handle}`);
if (!resizeHandle || resizeHandle.parentElement !== this.container) {
return;
} // prevent starting a drag operation
event.preventDefault(); // mark as currently resizing
if (this.classNames.resizing) {
this.container.classList.add(this.classNames.resizing);
}
if (this.config.onResizeStart) {
this.config.onResizeStart();
}
const {
sizer,
distributor
} = this.createSizerAndDistributor(resizeHandle);
distributor.start();
const onMouseMove = event => {
const offset = sizer.offsetFromEvent(event);
distributor.resizeFromContainerOffset(offset);
};
const body = document.body;
const finishResize = () => {
if (this.classNames.resizing) {
this.container.classList.remove(this.classNames.resizing);
}
distributor.finish();
if (this.config.onResizeStop) {
this.config.onResizeStop();
}
body.removeEventListener("mouseup", finishResize, false);
document.removeEventListener("mouseleave", finishResize, false);
body.removeEventListener("mousemove", onMouseMove, false);
};
body.addEventListener("mouseup", finishResize, false);
document.addEventListener("mouseleave", finishResize, false);
body.addEventListener("mousemove", onMouseMove, false);
});
(0, _defineProperty2.default)(this, "onResize", (0, _lodash.throttle)(() => {
const distributors = this.getDistributors(); // relax all items if they had any overconstrained flexboxes
distributors.forEach(d => d.start());
distributors.forEach(d => d.finish());
}, 100, {
trailing: true,
leading: true
}));
(0, _defineProperty2.default)(this, "getDistributors", () => {
return this.getResizeHandles().map(handle => {
const {
distributor
} = this.createSizerAndDistributor(handle);
return distributor;
});
});
if (!container) {
throw new Error("Resizer requires a non-null `container` arg");
}
this.classNames = {
handle: "resizer-handle",
reverse: "resizer-reverse",
vertical: "resizer-vertical",
resizing: "resizer-resizing"
};
}
setClassNames(classNames
/*: IClassNames*/
) {
this.classNames = classNames;
}
attach() {
this.container.addEventListener("mousedown", this.onMouseDown, false);
window.addEventListener("resize", this.onResize);
}
detach() {
this.container.removeEventListener("mousedown", this.onMouseDown, false);
window.removeEventListener("resize", this.onResize);
}
/**
Gives the distributor for a specific resize handle, as if you would have started
to drag that handle. Can be used to manipulate the size of an item programmatically.
@param {number} handleIndex the index of the resize handle in the container
@return {FixedDistributor} a new distributor for the given handle
*/
forHandleAt(handleIndex
/*: number*/
)
/*: FixedDistributor<C>*/
{
const handles = this.getResizeHandles();
const handle = handles[handleIndex];
if (handle) {
const {
distributor
} = this.createSizerAndDistributor(handle);
return distributor;
}
}
forHandleWithId(id
/*: string*/
)
/*: FixedDistributor<C>*/
{
const handles = this.getResizeHandles();
const handle = handles.find(h => h.getAttribute("data-id") === id);
if (handle) {
const {
distributor
} = this.createSizerAndDistributor(handle);
return distributor;
}
}
isReverseResizeHandle(el
/*: HTMLElement*/
)
/*: boolean*/
{
return el && el.classList.contains(this.classNames.reverse);
}
isResizeHandle(el
/*: HTMLElement*/
)
/*: boolean*/
{
return el && el.classList.contains(this.classNames.handle);
}
createSizerAndDistributor(resizeHandle
/*: HTMLDivElement*/
)
/*: {sizer: Sizer, distributor: FixedDistributor<any>}*/
{
const vertical = resizeHandle.classList.contains(this.classNames.vertical);
const reverse = this.isReverseResizeHandle(resizeHandle);
const Distributor = this.distributorCtor;
const sizer = Distributor.createSizer(this.container, vertical, reverse);
const item = Distributor.createItem(resizeHandle, this, sizer);
const distributor = new Distributor(item);
return {
sizer,
distributor
};
}
getResizeHandles() {
if (!this.container.children) return [];
return Array.from(this.container.children).filter(el => {
return this.isResizeHandle(el);
});
}
}
exports.default = Resizer;
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2018 - 2020 The Matrix.org Foundation C.I.C.\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n*/\n\nimport {throttle} from \"lodash\";\n\nimport FixedDistributor from \"./distributors/fixed\";\nimport ResizeItem from \"./item\";\nimport Sizer from \"./sizer\";\n\ninterface IClassNames {\n    // class on resize-handle\n    handle?: string;\n    // class on resize-handle\n    reverse?: string;\n    // class on resize-handle\n    vertical?: string;\n    // class on container\n    resizing?: string;\n}\n\nexport interface IConfig {\n    onResizeStart?(): void;\n    onResizeStop?(): void;\n    onResized?(size: number, id: string, element: HTMLElement): void;\n}\n\nexport default class Resizer<C extends IConfig = IConfig> {\n    private classNames: IClassNames;\n\n    // TODO move vertical/horizontal to config option/container class\n    // as it doesn't make sense to mix them within one container/Resizer\n    constructor(\n        public container: HTMLElement,\n        private readonly distributorCtor: {\n            new(item: ResizeItem): FixedDistributor<C, any>;\n            createItem(resizeHandle: HTMLDivElement, resizer: Resizer, sizer: Sizer): ResizeItem;\n            createSizer(containerElement: HTMLElement, vertical: boolean, reverse: boolean): Sizer;\n        },\n        public readonly config?: C,\n    ) {\n        if (!container) {\n            throw new Error(\"Resizer requires a non-null `container` arg\");\n        }\n\n        this.classNames = {\n            handle: \"resizer-handle\",\n            reverse: \"resizer-reverse\",\n            vertical: \"resizer-vertical\",\n            resizing: \"resizer-resizing\",\n        };\n    }\n\n    public setClassNames(classNames: IClassNames) {\n        this.classNames = classNames;\n    }\n\n    public attach() {\n        this.container.addEventListener(\"mousedown\", this.onMouseDown, false);\n        window.addEventListener(\"resize\", this.onResize);\n    }\n\n    public detach() {\n        this.container.removeEventListener(\"mousedown\", this.onMouseDown, false);\n        window.removeEventListener(\"resize\", this.onResize);\n    }\n\n    /**\n    Gives the distributor for a specific resize handle, as if you would have started\n    to drag that handle. Can be used to manipulate the size of an item programmatically.\n    @param {number} handleIndex the index of the resize handle in the container\n    @return {FixedDistributor} a new distributor for the given handle\n    */\n    public forHandleAt(handleIndex: number): FixedDistributor<C> {\n        const handles = this.getResizeHandles();\n        const handle = handles[handleIndex];\n        if (handle) {\n            const {distributor} = this.createSizerAndDistributor(<HTMLDivElement>handle);\n            return distributor;\n        }\n    }\n\n    public forHandleWithId(id: string): FixedDistributor<C> {\n        const handles = this.getResizeHandles();\n        const handle = handles.find((h) => h.getAttribute(\"data-id\") === id);\n        if (handle) {\n            const {distributor} = this.createSizerAndDistributor(<HTMLDivElement>handle);\n            return distributor;\n        }\n    }\n\n    public isReverseResizeHandle(el: HTMLElement): boolean {\n        return el && el.classList.contains(this.classNames.reverse);\n    }\n\n    public isResizeHandle(el: HTMLElement): boolean {\n        return el && el.classList.contains(this.classNames.handle);\n    }\n\n    private onMouseDown = (event: MouseEvent) => {\n        // use closest in case the resize handle contains\n        // child dom nodes that can be the target\n        const resizeHandle = event.target && (<HTMLDivElement>event.target).closest(`.${this.classNames.handle}`);\n        if (!resizeHandle || resizeHandle.parentElement !== this.container) {\n            return;\n        }\n        // prevent starting a drag operation\n        event.preventDefault();\n\n        // mark as currently resizing\n        if (this.classNames.resizing) {\n            this.container.classList.add(this.classNames.resizing);\n        }\n        if (this.config.onResizeStart) {\n            this.config.onResizeStart();\n        }\n\n        const {sizer, distributor} = this.createSizerAndDistributor(<HTMLDivElement>resizeHandle);\n        distributor.start();\n\n        const onMouseMove = (event) => {\n            const offset = sizer.offsetFromEvent(event);\n            distributor.resizeFromContainerOffset(offset);\n        };\n\n        const body = document.body;\n        const finishResize = () => {\n            if (this.classNames.resizing) {\n                this.container.classList.remove(this.classNames.resizing);\n            }\n            distributor.finish();\n            if (this.config.onResizeStop) {\n                this.config.onResizeStop();\n            }\n            body.removeEventListener(\"mouseup\", finishResize, false);\n            document.removeEventListener(\"mouseleave\", finishResize, false);\n            body.removeEventListener(\"mousemove\", onMouseMove, false);\n        };\n        body.addEventListener(\"mouseup\", finishResize, false);\n        document.addEventListener(\"mouseleave\", finishResize, false);\n        body.addEventListener(\"mousemove\", onMouseMove, false);\n    };\n\n    private onResize = throttle(() => {\n        const distributors = this.getDistributors();\n\n        // relax all items if they had any overconstrained flexboxes\n        distributors.forEach(d => d.start());\n        distributors.forEach(d => d.finish());\n    }, 100, {trailing: true, leading: true});\n\n    public getDistributors = () => {\n        return this.getResizeHandles().map(handle => {\n            const {distributor} = this.createSizerAndDistributor(<HTMLDivElement>handle);\n            return distributor;\n        });\n    };\n\n    private createSizerAndDistributor(\n        resizeHandle: HTMLDivElement,\n    ): {sizer: Sizer, distributor: FixedDistributor<any>} {\n        const vertical = resizeHandle.classList.contains(this.classNames.vertical);\n        const reverse = this.isReverseResizeHandle(resizeHandle);\n        const Distributor = this.distributorCtor;\n        const sizer = Distributor.createSizer(this.container, vertical, reverse);\n        const item = Distributor.createItem(resizeHandle, this, sizer);\n        const distributor = new Distributor(item);\n        return {sizer, distributor};\n    }\n\n    private getResizeHandles() {\n        if (!this.container.children) return [];\n        return Array.from(this.container.children).filter(el => {\n            return this.isResizeHandle(<HTMLElement>el);\n        }) as HTMLElement[];\n    }\n}\n"]}