215 lines
6.4 KiB
JavaScript
215 lines
6.4 KiB
JavaScript
// FIXME factor out key precondition (shift et. al)
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goog.provide('ol.interaction.Interaction');
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goog.require('goog.events.EventTarget');
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goog.require('ol.MapBrowserEvent');
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goog.require('ol.animation');
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goog.require('ol.easing');
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/**
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* @constructor
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* @extends {goog.events.EventTarget}
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*/
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ol.interaction.Interaction = function() {
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goog.base(this);
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/**
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* @private
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* @type {ol.Map}
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*/
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this.map_ = null;
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};
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goog.inherits(ol.interaction.Interaction, goog.events.EventTarget);
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/**
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* Get the map associated with this interaction.
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* @return {ol.Map} Map.
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*/
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ol.interaction.Interaction.prototype.getMap = function() {
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return this.map_;
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};
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/**
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* @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
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* @return {boolean} Whether the map browser event should continue
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* through the chain of interactions. false means stop, true
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* means continue.
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*/
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ol.interaction.Interaction.prototype.handleMapBrowserEvent =
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goog.abstractMethod;
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/**
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* Remove the interaction from its current map and attach it to the new map.
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* Subclasses may set up event handlers to get notified about changes to
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* the map here.
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* @param {ol.Map} map Map.
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*/
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ol.interaction.Interaction.prototype.setMap = function(map) {
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this.map_ = map;
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};
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/**
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* @param {ol.Map} map Map.
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* @param {ol.IView2D} view View.
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* @param {ol.Coordinate} delta Delta.
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* @param {number=} opt_duration Duration.
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*/
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ol.interaction.Interaction.pan = function(
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map, view, delta, opt_duration) {
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var currentCenter = view.getCenter();
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if (goog.isDef(currentCenter)) {
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if (goog.isDef(opt_duration) && opt_duration > 0) {
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map.beforeRender(ol.animation.pan({
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source: currentCenter,
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duration: opt_duration,
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easing: ol.easing.linear
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}));
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}
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var center = view.constrainCenter(
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[currentCenter[0] + delta[0], currentCenter[1] + delta[1]]);
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view.setCenter(center);
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}
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};
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/**
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* @param {ol.Map} map Map.
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* @param {ol.IView2D} view View.
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* @param {number|undefined} rotation Rotation.
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* @param {ol.Coordinate=} opt_anchor Anchor coordinate.
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* @param {number=} opt_duration Duration.
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*/
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ol.interaction.Interaction.rotate =
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function(map, view, rotation, opt_anchor, opt_duration) {
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rotation = view.constrainRotation(rotation, 0);
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ol.interaction.Interaction.rotateWithoutConstraints(
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map, view, rotation, opt_anchor, opt_duration);
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};
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/**
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* @param {ol.Map} map Map.
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* @param {ol.IView2D} view View.
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* @param {number|undefined} rotation Rotation.
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* @param {ol.Coordinate=} opt_anchor Anchor coordinate.
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* @param {number=} opt_duration Duration.
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*/
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ol.interaction.Interaction.rotateWithoutConstraints =
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function(map, view, rotation, opt_anchor, opt_duration) {
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if (goog.isDefAndNotNull(rotation)) {
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var currentRotation = view.getRotation();
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var currentCenter = view.getCenter();
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if (goog.isDef(currentRotation) && goog.isDef(currentCenter) &&
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goog.isDef(opt_duration) && opt_duration > 0) {
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map.beforeRender(ol.animation.rotate({
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rotation: currentRotation,
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duration: opt_duration,
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easing: ol.easing.easeOut
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}));
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if (goog.isDef(opt_anchor)) {
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map.beforeRender(ol.animation.pan({
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source: currentCenter,
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duration: opt_duration,
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easing: ol.easing.easeOut
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}));
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}
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}
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if (goog.isDefAndNotNull(opt_anchor)) {
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var center = view.calculateCenterRotate(rotation, opt_anchor);
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map.withFrozenRendering(function() {
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view.setCenter(center);
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view.setRotation(rotation);
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});
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} else {
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view.setRotation(rotation);
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}
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}
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};
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/**
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* @param {ol.Map} map Map.
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* @param {ol.IView2D} view View.
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* @param {number|undefined} resolution Resolution to go to.
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* @param {ol.Coordinate=} opt_anchor Anchor coordinate.
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* @param {number=} opt_duration Duration.
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* @param {number=} opt_direction Zooming direction; > 0 indicates
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* zooming out, in which case the constraints system will select
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* the largest nearest resolution; < 0 indicates zooming in, in
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* which case the constraints system will select the smallest
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* nearest resolution; == 0 indicates that the zooming direction
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* is unknown/not relevant, in which case the constraints system
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* will select the nearest resolution. If not defined 0 is
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* assumed.
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*/
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ol.interaction.Interaction.zoom =
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function(map, view, resolution, opt_anchor, opt_duration, opt_direction) {
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resolution = view.constrainResolution(resolution, 0, opt_direction);
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ol.interaction.Interaction.zoomWithoutConstraints(
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map, view, resolution, opt_anchor, opt_duration);
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};
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/**
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* @param {ol.Map} map Map.
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* @param {ol.IView2D} view View.
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* @param {number} delta Delta from previous zoom level.
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* @param {ol.Coordinate=} opt_anchor Anchor coordinate.
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* @param {number=} opt_duration Duration.
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*/
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ol.interaction.Interaction.zoomByDelta =
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function(map, view, delta, opt_anchor, opt_duration) {
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var currentResolution = view.getResolution();
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var resolution = view.constrainResolution(currentResolution, delta, 0);
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ol.interaction.Interaction.zoomWithoutConstraints(
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map, view, resolution, opt_anchor, opt_duration);
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};
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/**
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* @param {ol.Map} map Map.
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* @param {ol.IView2D} view View.
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* @param {number|undefined} resolution Resolution to go to.
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* @param {ol.Coordinate=} opt_anchor Anchor coordinate.
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* @param {number=} opt_duration Duration.
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*/
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ol.interaction.Interaction.zoomWithoutConstraints =
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function(map, view, resolution, opt_anchor, opt_duration) {
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if (goog.isDefAndNotNull(resolution)) {
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var currentResolution = view.getResolution();
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var currentCenter = view.getCenter();
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if (goog.isDef(currentResolution) && goog.isDef(currentCenter) &&
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goog.isDef(opt_duration) && opt_duration > 0) {
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map.beforeRender(ol.animation.zoom({
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resolution: currentResolution,
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duration: opt_duration,
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easing: ol.easing.easeOut
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}));
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if (goog.isDef(opt_anchor)) {
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map.beforeRender(ol.animation.pan({
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source: currentCenter,
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duration: opt_duration,
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easing: ol.easing.easeOut
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}));
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}
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}
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if (goog.isDefAndNotNull(opt_anchor)) {
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var center = view.calculateCenterZoom(resolution, opt_anchor);
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map.withFrozenRendering(function() {
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view.setCenter(center);
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view.setResolution(resolution);
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});
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} else {
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view.setResolution(resolution);
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}
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}
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};
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