basant307/AI_Governance_Project

1import * as util from '../../../util/index.mjs';2import * as is from '../../../is.mjs';3 4import arrowShapes from './arrow-shapes.mjs';5import coordEleMath from './coord-ele-math/index.mjs';6import images from './images.mjs';7import loadListeners from './load-listeners.mjs';8import nodeShapes from './node-shapes.mjs';9import redraw from './redraw.mjs';10 11var BaseRenderer = function( options ){ this.init( options ); };12var BR = BaseRenderer;13var BRp = BR.prototype;14 15BRp.clientFunctions = [ 'redrawHint', 'render', 'renderTo', 'matchCanvasSize', 'nodeShapeImpl', 'arrowShapeImpl' ];16 17BRp.init = function( options ){18  var r = this;19 20  r.options = options;21 22  r.cy = options.cy;23 24  var ctr = r.container = options.cy.container();25  var containerWindow = r.cy.window();26 27 28  // prepend a stylesheet in the head such that29  if( containerWindow ){30    var document = containerWindow.document;31    var head = document.head;32    var stylesheetId = '__________cytoscape_stylesheet';33    var className =    '__________cytoscape_container';34    var stylesheetAlreadyExists = document.getElementById( stylesheetId ) != null;35 36    if( ctr.className.indexOf( className ) < 0 ){37      ctr.className = ( ctr.className || '' ) + ' ' + className;38    }39 40    if( !stylesheetAlreadyExists ){41      var stylesheet = document.createElement('style');42 43      stylesheet.id = stylesheetId;44      stylesheet.textContent = '.'+className+' { position: relative; }';45 46      head.insertBefore( stylesheet, head.children[0] ); // first so lowest priority47    }48 49    var computedStyle = containerWindow.getComputedStyle( ctr );50    var position = computedStyle.getPropertyValue('position');51 52    if( position === 'static' ){53      util.warn('A Cytoscape container has style position:static and so can not use UI extensions properly');54    }55  }56 57  r.selection = [ undefined, undefined, undefined, undefined, 0]; // Coordinates for selection box, plus enabled flag58 59  r.bezierProjPcts = [ 0.05, 0.225, 0.4, 0.5, 0.6, 0.775, 0.95 ];60 61  //--Pointer-related data62  r.hoverData = {down: null, last: null,63      downTime: null, triggerMode: null,64      dragging: false,65      initialPan: [ null, null ], capture: false};66 67  r.dragData = {possibleDragElements: []};68 69  r.touchData = {70    start: null, capture: false,71 72    // These 3 fields related to tap, taphold events73    startPosition: [ null, null, null, null, null, null ],74    singleTouchStartTime: null,75    singleTouchMoved: true,76 77    now: [ null, null, null, null, null, null ],78    earlier: [ null, null, null, null, null, null ]79  };80 81  r.redraws = 0;82  r.showFps = options.showFps;83  r.debug = options.debug;84  r.webgl = options.webgl;85 86  r.hideEdgesOnViewport = options.hideEdgesOnViewport;87  r.textureOnViewport = options.textureOnViewport;88  r.wheelSensitivity = options.wheelSensitivity;89  r.motionBlurEnabled = options.motionBlur; // on by default90  r.forcedPixelRatio = is.number(options.pixelRatio) ? options.pixelRatio : null;91  r.motionBlur = options.motionBlur; // for initial kick off92  r.motionBlurOpacity = options.motionBlurOpacity;93  r.motionBlurTransparency = 1 - r.motionBlurOpacity;94  r.motionBlurPxRatio = 1;95  r.mbPxRBlurry = 1; //0.8;96  r.minMbLowQualFrames = 4;97  r.fullQualityMb = false;98  r.clearedForMotionBlur = [];99  r.desktopTapThreshold = options.desktopTapThreshold;100  r.desktopTapThreshold2 = options.desktopTapThreshold * options.desktopTapThreshold;101  r.touchTapThreshold = options.touchTapThreshold;102  r.touchTapThreshold2 = options.touchTapThreshold * options.touchTapThreshold;103  r.tapholdDuration = 500;104 105  r.bindings = [];106  r.beforeRenderCallbacks = [];107  r.beforeRenderPriorities = { // higher priority execs before lower one108    animations:   400,109    eleCalcs:     300,110    eleTxrDeq:    200,111    lyrTxrDeq:    150,112    lyrTxrSkip:   100,113  };114 115  r.registerNodeShapes();116  r.registerArrowShapes();117  r.registerCalculationListeners();118};119 120BRp.notify = function( eventName, eles ) {121  var r = this;122  var cy = r.cy;123 124  // the renderer can't be notified after it's destroyed125  if( this.destroyed ){ return; }126 127  if( eventName === 'init' ){128    r.load();129    return;130  }131 132  if( eventName === 'destroy' ){133    r.destroy();134    return;135  }136 137  if(138    eventName === 'add' 139    || eventName === 'remove'140    || (eventName === 'move' && cy.hasCompoundNodes())141    || eventName === 'load'142    || eventName === 'zorder'143    || eventName === 'mount'144  ){145    r.invalidateCachedZSortedEles();146  }147 148  if( eventName === 'viewport' ){149    r.redrawHint( 'select', true );150  }151 152  if( eventName === 'gc' ){153    r.redrawHint( 'gc', true );154  }155 156  if( eventName === 'load' || eventName === 'resize' || eventName === 'mount' ){157    r.invalidateContainerClientCoordsCache();158    r.matchCanvasSize( r.container );159  }160 161  r.redrawHint( 'eles', true );162  r.redrawHint( 'drag', true );163 164  this.startRenderLoop();165 166  this.redraw();167};168 169BRp.destroy = function(){170  var r = this;171 172  r.destroyed = true;173 174  r.cy.stopAnimationLoop();175 176  for( var i = 0; i < r.bindings.length; i++ ){177    var binding = r.bindings[ i ];178    var b = binding;179    var tgt = b.target;180 181    ( tgt.off || tgt.removeEventListener ).apply( tgt, b.args );182  }183 184  r.bindings = [];185  r.beforeRenderCallbacks = [];186  r.onUpdateEleCalcsFns = [];187 188  if( r.removeObserver ){189    r.removeObserver.disconnect();190  }191 192  if( r.styleObserver ){193    r.styleObserver.disconnect();194  }195 196  if( r.resizeObserver ){197    r.resizeObserver.disconnect();198  }199 200  if( r.labelCalcDiv ){201    try {202      document.body.removeChild( r.labelCalcDiv ); // eslint-disable-line no-undef203    } catch( e ){204      // ie10 issue #1014205    }206  }207};208 209BRp.isHeadless = function(){210  return false;211};212 213[214  arrowShapes,215  coordEleMath,216  images,217  loadListeners,218  nodeShapes,219  redraw220].forEach( function( props ){221  util.extend( BRp, props );222} );223 224export default BR;225