matrix-react-sdk/src/components/views/elements/ActionButton.tsx

/*
Copyright 2017 Vector Creations Ltd

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.
*/

import React from 'react';
import AccessibleButton from './AccessibleButton';
import dis from '../../../dispatcher/dispatcher';
import * as sdk from '../../../index';
import Analytics from '../../../Analytics';
import { replaceableComponent } from "../../../utils/replaceableComponent";

interface IProps {
    size?: string;
    tooltip?: boolean;
    action: string;
    mouseOverAction?: string;
    label: string;
    iconPath?: string;
    className?: string;
    children?: JSX.Element;
}

interface IState {
    showTooltip: boolean;
}

@replaceableComponent("views.elements.ActionButton")
export default class ActionButton extends React.Component<IProps, IState> {
    static defaultProps = {
        size: "25",
        tooltip: false,
    };

    constructor(props: IProps) {
        super(props);

        this.state = {
            showTooltip: false,
        };
    }

    private onClick = (ev: React.MouseEvent): void => {
        ev.stopPropagation();
        Analytics.trackEvent('Action Button', 'click', this.props.action);
        dis.dispatch({ action: this.props.action });
    };

    private onMouseEnter = (): void => {
        if (this.props.tooltip) this.setState({ showTooltip: true });
        if (this.props.mouseOverAction) {
            dis.dispatch({ action: this.props.mouseOverAction });
        }
    };

    private onMouseLeave = (): void => {
        this.setState({ showTooltip: false });
    };

    render() {
        let tooltip;
        if (this.state.showTooltip) {
            const Tooltip = sdk.getComponent("elements.Tooltip");
            tooltip = <Tooltip className="mx_RoleButton_tooltip" label={this.props.label} />;
        }

        const icon = this.props.iconPath ?
            (<img src={this.props.iconPath} width={this.props.size} height={this.props.size} />) :
            undefined;

        const classNames = ["mx_RoleButton"];
        if (this.props.className) {
            classNames.push(this.props.className);
        }

        return (
            <AccessibleButton
                className={classNames.join(" ")}
                onClick={this.onClick}
                onMouseEnter={this.onMouseEnter}
                onMouseLeave={this.onMouseLeave}
                aria-label={this.props.label}
            >
                { icon }
                { tooltip }
                { this.props.children }
            </AccessibleButton>
        );
    }
}