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import React = require("react");
import { action, computed, observable } from "mobx";
import { observer } from "mobx-react";
import { Doc } from "../../../fields/Doc";
import { TraceMobx } from "../../../fields/util";
import { emptyFunction, OmitKeys, returnOne, returnVal } from "../../../Utils";
import { DocumentView, DocumentViewProps } from "../nodes/DocumentView";
import { StyleProp } from "../StyleProvider";
import "./ContentFittingDocumentView.scss";
interface ContentFittingDocumentViewProps {
dontCenter?: "x" | "y" | "xy";
}
@observer
export class ContentFittingDocumentView extends React.Component<DocumentViewProps & ContentFittingDocumentViewProps> {
public get displayName() { return "DocumentView(" + this.props.Document?.title + ")"; } // this makes mobx trace() statements more descriptive
public ContentRef = React.createRef<HTMLDivElement>();
@observable public docView: DocumentView | undefined | null;
@computed get layoutDoc() { return Doc.Layout(this.props.Document, this.props.LayoutTemplate?.()); }
@computed get nativeWidth() { return returnVal(this.props.NativeWidth?.(), Doc.NativeWidth(this.layoutDoc, this.props.DataDoc, this.props.freezeDimensions)); }
@computed get nativeHeight() { return returnVal(this.props.NativeHeight?.(), Doc.NativeHeight(this.layoutDoc, this.props.DataDoc, this.props.freezeDimensions) || 0); }
@computed get nativeScaling() {
const nativeW = this.nativeWidth;
const nativeH = this.nativeHeight;
let scaling = 1;
if (nativeW && (this.layoutDoc?._fitWidth || this.props.PanelHeight() / nativeH > this.props.PanelWidth() / nativeW)) {
scaling = this.props.PanelWidth() / nativeW; // width-limited or fitWidth
} else if (nativeW && nativeH) {
scaling = this.props.PanelHeight() / nativeH; // height-limited
}
return scaling;
}
@computed get panelWidth() { return this.nativeWidth ? this.nativeWidth * this.nativeScaling : this.props.PanelWidth(); }
@computed get panelHeight() {
if (this.nativeHeight) {
if (this.props.Document._fitWidth)
return Math.min(this.props.PanelHeight(), this.panelWidth / Doc.NativeAspect(this.layoutDoc, this.props.DataDoc, this.props.freezeDimensions) || 1);
else return Math.min(this.props.PanelHeight(), this.nativeHeight * this.nativeScaling);
}
return this.props.PanelHeight();
}
@computed get Xshift() { return this.nativeWidth ? (this.props.PanelWidth() - this.nativeWidth * this.nativeScaling) / 2 : 0; }
@computed get YShift() { return this.nativeWidth && this.nativeHeight && Math.abs(this.Xshift) < 0.001 ? (this.props.PanelHeight() - this.nativeHeight * this.nativeScaling) / 2 : 0; }
@computed get centeringX() { return this.props.dontCenter?.includes("x") ? 0 : this.Xshift; }
@computed get centeringY() { return this.props.dontCenter?.includes("y") ? 0 : this.YShift; }
PanelWidth = () => this.panelWidth;
PanelHeight = () => this.panelHeight;
NativeScaling = () => this.nativeScaling;
screenToLocalTransform = () => this.props.ScreenToLocalTransform().translate(-this.centeringX, -this.centeringY).scale(1 / this.nativeScaling);
render() {
TraceMobx();
return (<div className="contentFittingDocumentView">
{!this.props.Document || !this.props.PanelWidth() ? (null) : (
<div className="contentFittingDocumentView-previewDoc" ref={this.ContentRef}
style={{
transform: `translate(${this.centeringX}px, ${this.centeringY}px)`,
borderRadius: this.props.styleProvider?.(this.props.Document, this.props, StyleProp.PointerEvents),
height: Math.abs(this.YShift) > 0.001 ? `${100 * this.nativeHeight / this.nativeWidth * this.props.PanelWidth() / this.props.PanelHeight()}%` : this.props.PanelHeight(),
width: Math.abs(this.Xshift) > 0.001 ? `${100 * (this.props.PanelWidth() - this.Xshift * 2) / this.props.PanelWidth()}%` : this.props.PanelWidth(),
}}>
<DocumentView {...OmitKeys(this.props, ["NativeWidth", "NativeHeight"]).omit}
ref={action((r: DocumentView | null) => this.docView = r)}
LayoutTemplate={this.props.LayoutTemplate}
PanelWidth={this.PanelWidth}
PanelHeight={this.PanelHeight}
ContentScaling={this.NativeScaling}
ScreenToLocalTransform={this.screenToLocalTransform}
focus={this.props.focus || emptyFunction}
bringToFront={emptyFunction}
/>
</div>)}
</div>);
}
}
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