@catull/igniteui-angular
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Ignite UI for Angular is a dependency-free Angular toolkit for building modern web apps
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JavaScript
import { ConnectedPositioningStrategy } from './connected-positioning-strategy';
import { Util } from '../utilities';
export class BaseFitPositionStrategy extends ConnectedPositioningStrategy {
/** @inheritdoc */
position(contentElement, size, document, initialCall) {
const rects = super.calculateElementRectangles(contentElement);
const connectedFit = {};
if (initialCall) {
connectedFit.targetRect = rects.targetRect;
connectedFit.contentElementRect = rects.elementRect;
this._initialSettings = this._initialSettings || Object.assign({}, this.settings);
this.settings = Object.assign({}, this._initialSettings);
connectedFit.viewPortRect = Util.getViewportRect(document);
this.updateViewPortFit(connectedFit);
if (connectedFit.fitHorizontal.back < 0 || connectedFit.fitHorizontal.forward < 0 ||
connectedFit.fitVertical.back < 0 || connectedFit.fitVertical.forward < 0) {
this.fitInViewport(contentElement, connectedFit);
}
}
this.setStyle(contentElement, rects.targetRect, rects.elementRect, connectedFit);
}
/**
* Checks if element can fit in viewport and updates provided connectedFit
* with the result
* @param connectedFit connectedFit to update
*/
updateViewPortFit(connectedFit) {
connectedFit.left = this.calculateLeft(connectedFit.targetRect, connectedFit.contentElementRect, this.settings.horizontalStartPoint, this.settings.horizontalDirection, connectedFit.horizontalOffset ? connectedFit.horizontalOffset : 0);
connectedFit.right = connectedFit.left + connectedFit.contentElementRect.width;
connectedFit.fitHorizontal = {
back: Math.round(connectedFit.left - connectedFit.viewPortRect.left),
forward: Math.round(connectedFit.viewPortRect.right - connectedFit.right)
};
connectedFit.top = this.calculateTop(connectedFit.targetRect, connectedFit.contentElementRect, this.settings.verticalStartPoint, this.settings.verticalDirection, connectedFit.verticalOffset ? connectedFit.verticalOffset : 0);
connectedFit.bottom = connectedFit.top + connectedFit.contentElementRect.height;
connectedFit.fitVertical = {
back: Math.round(connectedFit.top - connectedFit.viewPortRect.top),
forward: Math.round(connectedFit.viewPortRect.bottom - connectedFit.bottom)
};
}
/**
* Calculates the position of the left border of the element if it gets positioned
* with provided start point and direction
* @param targetRect Rectangle of the target where element is attached
* @param elementRect Rectangle of the element
* @param startPoint Start point of the target
* @param direction Direction in which to show the element
*/
calculateLeft(targetRect, elementRect, startPoint, direction, offset) {
return targetRect.right + targetRect.width * startPoint + elementRect.width * direction + offset;
}
/**
* Calculates the position of the top border of the element if it gets positioned
* with provided position settings related to the target
* @param targetRect Rectangle of the target where element is attached
* @param elementRect Rectangle of the element
* @param startPoint Start point of the target
* @param direction Direction in which to show the element
*/
calculateTop(targetRect, elementRect, startPoint, direction, offset) {
return targetRect.bottom + targetRect.height * startPoint + elementRect.height * direction + offset;
}
}
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connectedFit.horizontalOffset : 0);\n        connectedFit.right = connectedFit.left + connectedFit.contentElementRect.width;\n        connectedFit.fitHorizontal = {\n                back: Math.round(connectedFit.left - connectedFit.viewPortRect.left),\n                forward: Math.round(connectedFit.viewPortRect.right - connectedFit.right)\n            };\n\n        connectedFit.top = this.calculateTop(\n            connectedFit.targetRect,\n            connectedFit.contentElementRect,\n            this.settings.verticalStartPoint,\n            this.settings.verticalDirection,\n            connectedFit.verticalOffset ? connectedFit.verticalOffset : 0);\n        connectedFit.bottom = connectedFit.top + connectedFit.contentElementRect.height;\n        connectedFit.fitVertical = {\n            back: Math.round(connectedFit.top - connectedFit.viewPortRect.top),\n            forward: Math.round(connectedFit.viewPortRect.bottom - connectedFit.bottom)\n        };\n    }\n\n    /**\n     * Calculates the position of the left border of the element if it gets positioned\n     * with provided start point and direction\n     * @param targetRect Rectangle of the target where element is attached\n     * @param elementRect Rectangle of the element\n     * @param startPoint Start point of the target\n     * @param direction Direction in which to show the element\n     */\n    protected calculateLeft(\n        targetRect: ClientRect, elementRect: ClientRect, startPoint: HorizontalAlignment, direction: HorizontalAlignment, offset?: number):\n        number {\n        return targetRect.right + targetRect.width * startPoint + elementRect.width * direction + offset;\n    }\n\n    /**\n     * Calculates the position of the top border of the element if it gets positioned\n     * with provided position settings related to the target\n     * @param targetRect Rectangle of the target where element is attached\n     * @param elementRect Rectangle of the element\n     * @param startPoint Start point of the target\n     * @param direction Direction in which to show the element\n     */\n    protected calculateTop(\n        targetRect: ClientRect, elementRect: ClientRect, startPoint: VerticalAlignment, direction: VerticalAlignment, offset?: number):\n        number {\n        return targetRect.bottom + targetRect.height * startPoint + elementRect.height * direction + offset;\n    }\n\n    /**\n     * Fits the element into viewport according to the position settings\n     * @param element element to fit in viewport\n     * @param connectedFit connectedFit object containing all necessary parameters\n     */\n    protected abstract fitInViewport(\n        element: HTMLElement,\n        connectedFit: ConnectedFit);\n}\n\n\n"]}