@catull/igniteui-angular
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Ignite UI for Angular is a dependency-free Angular toolkit for building modern web apps
89 lines • 13.9 kB
JavaScript
import { HorizontalAlignment, Util, VerticalAlignment } from './../utilities';
import { scaleInVerTop, scaleOutVerTop } from '../../../animations/main';
/**
* Positions the element based on the directions and start point passed in trough PositionSettings.
* It is possible to either pass a start point or an HTMLElement as a positioning base.
*/
export class ConnectedPositioningStrategy {
constructor(settings) {
this._defaultSettings = {
// default Point(0, 0) in getPointFromPositionsSettings
target: null,
horizontalDirection: HorizontalAlignment.Right,
verticalDirection: VerticalAlignment.Bottom,
horizontalStartPoint: HorizontalAlignment.Left,
verticalStartPoint: VerticalAlignment.Bottom,
openAnimation: scaleInVerTop,
closeAnimation: scaleOutVerTop,
minSize: { width: 0, height: 0 }
};
this.settings = Object.assign({}, this._defaultSettings, settings);
}
/**
* Obtains the ClientRect objects for the required elements - target and element to position
* @returns target and element ClientRect objects
*/
calculateElementRectangles(contentElement) {
return {
targetRect: Util.getTargetRect(this.settings),
elementRect: contentElement.getBoundingClientRect()
};
}
/** @inheritdoc */
position(contentElement, size, document, initialCall) {
const rects = this.calculateElementRectangles(contentElement);
this.setStyle(contentElement, rects.targetRect, rects.elementRect, {});
}
/**
* @inheritdoc
* Creates clone of this position strategy
* @returns clone of this position strategy
*/
clone() {
return Util.cloneInstance(this);
}
/**
* Sets element's style which effectively positions provided element according
* to provided position settings
* @param element Element to position
* @param targetRect Bounding rectangle of strategy target
* @param elementRect Bounding rectangle of the element
*/
setStyle(element, targetRect, elementRect, connectedFit) {
const horizontalOffset = connectedFit.horizontalOffset ? connectedFit.horizontalOffset : 0;
const verticalOffset = connectedFit.verticalOffset ? connectedFit.verticalOffset : 0;
const startPoint = {
x: targetRect.right + targetRect.width * this.settings.horizontalStartPoint + horizontalOffset,
y: targetRect.bottom + targetRect.height * this.settings.verticalStartPoint + verticalOffset
};
const wrapperRect = element.parentElement.getBoundingClientRect();
// clean up styles - if auto position strategy is chosen we may pass here several times
element.style.right = '';
element.style.left = '';
element.style.bottom = '';
element.style.top = '';
switch (this.settings.horizontalDirection) {
case HorizontalAlignment.Left:
element.style.right = `${Math.round(wrapperRect.right - startPoint.x)}px`;
break;
case HorizontalAlignment.Center:
element.style.left = `${Math.round(startPoint.x - wrapperRect.left - elementRect.width / 2)}px`;
break;
case HorizontalAlignment.Right:
element.style.left = `${Math.round(startPoint.x - wrapperRect.left)}px`;
break;
}
switch (this.settings.verticalDirection) {
case VerticalAlignment.Top:
element.style.bottom = `${Math.round(wrapperRect.bottom - startPoint.y)}px`;
break;
case VerticalAlignment.Middle:
element.style.top = `${Math.round(startPoint.y - wrapperRect.top - elementRect.height / 2)}px`;
break;
case VerticalAlignment.Bottom:
element.style.top = `${Math.round(startPoint.y - wrapperRect.top)}px`;
break;
}
}
}
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target and element to position\n   * @returns target and element ClientRect objects\n   */\n  protected calculateElementRectangles(contentElement): { targetRect: ClientRect, elementRect: ClientRect } {\n      return {\n          targetRect: Util.getTargetRect(this.settings),\n          elementRect: contentElement.getBoundingClientRect() as ClientRect\n      };\n  }\n\n  /** @inheritdoc */\n  position(contentElement: HTMLElement, size: Size, document?: Document, initialCall?: boolean): void {\n    const rects =  this.calculateElementRectangles(contentElement);\n    this.setStyle(contentElement, rects.targetRect, rects.elementRect, {});\n  }\n\n  /**\n   * @inheritdoc\n   * Creates clone of this position strategy\n   * @returns clone of this position strategy\n   */\n  clone(): IPositionStrategy {\n    return Util.cloneInstance(this);\n  }\n\n  /**\n   * Sets element's style which effectively positions provided element according\n   * to provided position settings\n   * @param element Element to position\n   * @param targetRect Bounding rectangle of strategy target\n   * @param elementRect Bounding rectangle of the element\n   */\n  protected setStyle(element: HTMLElement, targetRect: ClientRect, elementRect: ClientRect, connectedFit: ConnectedFit) {\n      const horizontalOffset = connectedFit.horizontalOffset ? connectedFit.horizontalOffset : 0;\n      const verticalOffset = connectedFit.verticalOffset ? connectedFit.verticalOffset : 0;\n    const startPoint: Point = {\n      x: targetRect.right + targetRect.width * this.settings.horizontalStartPoint + horizontalOffset,\n      y: targetRect.bottom + targetRect.height * this.settings.verticalStartPoint + verticalOffset\n    };\n    const wrapperRect: ClientRect = element.parentElement.getBoundingClientRect();\n\n    //  clean up styles - if auto position strategy is chosen we may pass here several times\n    element.style.right = '';\n    element.style.left = '';\n    element.style.bottom = '';\n    element.style.top = '';\n\n    switch (this.settings.horizontalDirection) {\n      case HorizontalAlignment.Left:\n        element.style.right = `${Math.round(wrapperRect.right - startPoint.x)}px`;\n        break;\n      case HorizontalAlignment.Center:\n        element.style.left = `${Math.round(startPoint.x - wrapperRect.left - elementRect.width / 2)}px`;\n        break;\n      case HorizontalAlignment.Right:\n        element.style.left = `${Math.round(startPoint.x - wrapperRect.left)}px`;\n        break;\n    }\n\n    switch (this.settings.verticalDirection) {\n      case VerticalAlignment.Top:\n        element.style.bottom = `${Math.round(wrapperRect.bottom - startPoint.y)}px`;\n        break;\n      case VerticalAlignment.Middle:\n        element.style.top = `${Math.round(startPoint.y - wrapperRect.top - elementRect.height / 2)}px`;\n        break;\n      case VerticalAlignment.Bottom:\n        element.style.top = `${Math.round(startPoint.y - wrapperRect.top)}px`;\n        break;\n    }\n  }\n}\n"]}