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import * as util from '../../../util';
var CRp = {};
CRp.safeDrawImage = function( context, img, ix, iy, iw, ih, x, y, w, h ){
// detect problematic cases for old browsers with bad images (cheaper than try-catch)
if( iw <= 0 || ih <= 0 || w <= 0 || h <= 0 ){
return;
}
try {
context.drawImage( img, ix, iy, iw, ih, x, y, w, h );
} catch (e) {
util.warn(e);
}
};
CRp.drawInscribedImage = function( context, img, node, index, nodeOpacity ){
var r = this;
var pos = node.position();
var nodeX = pos.x;
var nodeY = pos.y;
var styleObj = node.cy().style();
var getIndexedStyle = styleObj.getIndexedStyle.bind( styleObj );
var fit = getIndexedStyle( node, 'background-fit', 'value', index );
var repeat = getIndexedStyle( node, 'background-repeat', 'value', index );
var nodeW = node.width();
var nodeH = node.height();
var paddingX2 = node.padding() * 2;
var nodeTW = nodeW + ( getIndexedStyle( node, 'background-width-relative-to', 'value', index ) === 'inner' ? 0 : paddingX2 );
var nodeTH = nodeH + ( getIndexedStyle( node, 'background-height-relative-to', 'value', index ) === 'inner' ? 0 : paddingX2 );
var rs = node._private.rscratch;
var clip = getIndexedStyle( node, 'background-clip', 'value', index );
var shouldClip = clip === 'node';
var imgOpacity = getIndexedStyle( node, 'background-image-opacity', 'value', index ) * nodeOpacity;
var smooth = getIndexedStyle( node, 'background-image-smoothing', 'value', index );
var cornerRadius = node.pstyle('corner-radius').value;
if (cornerRadius !== 'auto') cornerRadius = node.pstyle('corner-radius').pfValue;
var imgW = img.width || img.cachedW;
var imgH = img.height || img.cachedH;
// workaround for broken browsers like ie
if( null == imgW || null == imgH ){
document.body.appendChild( img ); // eslint-disable-line no-undef
imgW = img.cachedW = img.width || img.offsetWidth;
imgH = img.cachedH = img.height || img.offsetHeight;
document.body.removeChild( img ); // eslint-disable-line no-undef
}
var w = imgW;
var h = imgH;
if( getIndexedStyle( node, 'background-width', 'value', index ) !== 'auto' ){
if( getIndexedStyle( node, 'background-width', 'units', index ) === '%' ){
w = getIndexedStyle( node, 'background-width', 'pfValue', index ) * nodeTW;
} else {
w = getIndexedStyle( node, 'background-width', 'pfValue', index );
}
}
if( getIndexedStyle( node, 'background-height', 'value', index ) !== 'auto' ){
if( getIndexedStyle( node, 'background-height', 'units', index ) === '%' ){
h = getIndexedStyle( node, 'background-height', 'pfValue', index ) * nodeTH;
} else {
h = getIndexedStyle( node, 'background-height', 'pfValue', index );
}
}
if( w === 0 || h === 0 ){
return; // no point in drawing empty image (and chrome is broken in this case)
}
if( fit === 'contain' ){
var scale = Math.min( nodeTW / w, nodeTH / h );
w *= scale;
h *= scale;
} else if( fit === 'cover' ){
var scale = Math.max( nodeTW / w, nodeTH / h );
w *= scale;
h *= scale;
}
var x = (nodeX - nodeTW / 2); // left
var posXUnits = getIndexedStyle( node, 'background-position-x', 'units', index );
var posXPfVal = getIndexedStyle( node, 'background-position-x', 'pfValue', index );
if( posXUnits === '%' ){
x += (nodeTW - w) * posXPfVal;
} else {
x += posXPfVal;
}
var offXUnits = getIndexedStyle( node, 'background-offset-x', 'units', index );
var offXPfVal = getIndexedStyle( node, 'background-offset-x', 'pfValue', index );
if( offXUnits === '%' ){
x += (nodeTW - w) * offXPfVal;
} else {
x += offXPfVal;
}
var y = (nodeY - nodeTH / 2); // top
var posYUnits = getIndexedStyle( node, 'background-position-y', 'units', index );
var posYPfVal = getIndexedStyle( node, 'background-position-y', 'pfValue', index );
if( posYUnits === '%' ){
y += (nodeTH - h) * posYPfVal;
} else {
y += posYPfVal;
}
var offYUnits = getIndexedStyle( node, 'background-offset-y', 'units', index );
var offYPfVal = getIndexedStyle( node, 'background-offset-y', 'pfValue', index );
if( offYUnits === '%' ){
y += (nodeTH - h) * offYPfVal;
} else {
y += offYPfVal;
}
if( rs.pathCache ){
x -= nodeX;
y -= nodeY;
nodeX = 0;
nodeY = 0;
}
var gAlpha = context.globalAlpha;
context.globalAlpha = imgOpacity;
var smoothingEnabled = r.getImgSmoothing( context );
var isSmoothingSwitched = false;
if( smooth === 'no' && smoothingEnabled ){
r.setImgSmoothing( context, false );
isSmoothingSwitched = true;
} else if( smooth === 'yes' && !smoothingEnabled ){
r.setImgSmoothing( context, true );
isSmoothingSwitched = true;
}
if( repeat === 'no-repeat' ){
if( shouldClip ){
context.save();
if( rs.pathCache ){
context.clip( rs.pathCache );
} else {
r.nodeShapes[ r.getNodeShape( node ) ].draw(
context,
nodeX, nodeY,
nodeTW, nodeTH,
cornerRadius, rs );
context.clip();
}
}
r.safeDrawImage( context, img, 0, 0, imgW, imgH, x, y, w, h );
if( shouldClip ){
context.restore();
}
} else {
var pattern = context.createPattern( img, repeat );
context.fillStyle = pattern;
r.nodeShapes[ r.getNodeShape( node ) ].draw(
context,
nodeX, nodeY,
nodeTW, nodeTH, cornerRadius, rs);
context.translate( x, y );
context.fill();
context.translate( -x, -y );
}
context.globalAlpha = gAlpha;
if( isSmoothingSwitched ){ r.setImgSmoothing( context, smoothingEnabled ); }
};
export default CRp;
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