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simplified constraint code

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This commit is contained in:
Victor Rodriguez Gil 2016-06-14 17:31:21 +00:00
parent c91039b545
commit 36264c44ef
1 changed files with 18 additions and 40 deletions
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58
src/viewport.js
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@ -495,62 +495,40 @@ $.Viewport.prototype = {
bounds.width,
bounds.height);
var horizontalThreshold = this.visibilityRatio * newBounds.width;
var verticalThreshold = this.visibilityRatio * newBounds.height;
if (this.wrapHorizontal) {
//do nothing
} else {
var dx = 0;
var thresholdLeft = newBounds.x + (newBounds.width - horizontalThreshold);
var leftDx = this._contentBoundsNoRotate.x - thresholdLeft;
var horizontalThreshold = this.visibilityRatio * newBounds.width;
var boundsRight = newBounds.x + newBounds.width;
var contentRight = this._contentBoundsNoRotate.x + this._contentBoundsNoRotate.width;
var thresholdRight = newBounds.x + horizontalThreshold;
var rightDx = contentRight - thresholdRight;
var leftDx = this._contentBoundsNoRotate.x - boundsRight + horizontalThreshold;
var rightDx = contentRight - newBounds.x - horizontalThreshold;
if (this._contentBoundsNoRotate.x > thresholdLeft) {
dx = leftDx;
}
if (contentRight < thresholdRight) {
if (dx) {
dx = (dx + rightDx) / 2;
} else {
dx = rightDx;
}
}
if (horizontalThreshold > this._contentBoundsNoRotate.width && (newBounds.x > -thresholdLeft || newBounds.x + horizontalThreshold < 1)) {
if (horizontalThreshold > this._contentBoundsNoRotate.width) {
newBounds.x += (leftDx + rightDx) / 2;
} else {
newBounds.x += dx;
} else if (rightDx < 0) {
newBounds.x += rightDx;
} else if (leftDx > 0) {
newBounds.x += leftDx;
}
}
if (this.wrapVertical) {
//do nothing
} else {
var dy = 0;
var thresholdTop = newBounds.y + (newBounds.height - verticalThreshold);
var topDy = this._contentBoundsNoRotate.y - thresholdTop;
var verticalThreshold = this.visibilityRatio * newBounds.height;
var boundsBottom = newBounds.y + newBounds.height;
var contentBottom = this._contentBoundsNoRotate.y + this._contentBoundsNoRotate.height;
var thresholdBottom = newBounds.y + verticalThreshold;
var bottomDy = contentBottom - thresholdBottom;
var topDy = this._contentBoundsNoRotate.y - boundsBottom + verticalThreshold;
var bottomDy = contentBottom - newBounds.y - verticalThreshold;
if (this._contentBoundsNoRotate.y > thresholdTop) {
dy = topDy;
}
if (contentBottom < thresholdBottom) {
if (dy) {
dy = (dy + bottomDy) / 2;
} else {
dy = bottomDy;
}
}
if (verticalThreshold > this._contentBoundsNoRotate.height && (newBounds.y > -thresholdTop || newBounds.y + verticalThreshold < 1)) {
if (verticalThreshold > this._contentBoundsNoRotate.height) {
newBounds.y += (topDy + bottomDy) / 2;
} else {
newBounds.y += dy;
} else if (bottomDy < 0) {
newBounds.y += bottomDy;
} else if (topDy > 0) {
newBounds.y += topDy;
}
}
if (this.viewer) {