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am 03c87bf5: Allow a webpage that wants to scroll off the title bar to do so.

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Merge commit '03c87bf51cdf5a105b53b5d6fbf9cfbc6c93751e' into eclair-plus-aosp

* commit '03c87bf51cdf5a105b53b5d6fbf9cfbc6c93751e':
  Allow a webpage that wants to scroll off the title bar to do so.
This commit is contained in:
Leon Scroggins
2009-09-21 08:24:54 -07:00
committed by Android Git Automerger
parent 73d7ca9d56 03c87bf51c
commit b91dd357c3
1 changed files with 12 additions and 10 deletions
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22
core/java/android/webkit/WebView.java
View File

@@ -420,6 +420,7 @@ public class WebView extends AbsoluteLayout
private static final int STD_SPEED = 480; // pixels per second
// time for the longest scroll animation
private static final int MAX_DURATION = 750; // milliseconds
private static final int SLIDE_TITLE_DURATION = 500; // milliseconds
private Scroller mScroller;
private boolean mWrapContent;
@@ -2419,7 +2420,6 @@ public class WebView extends AbsoluteLayout
private boolean pinScrollBy(int dx, int dy, boolean animate, int animationDuration) {
return pinScrollTo(mScrollX + dx, mScrollY + dy, animate, animationDuration);
}
// helper to pin the scrollTo parameters (already in view coordinates)
// returns true if the scroll was changed
private boolean pinScrollTo(int x, int y, boolean animate, int animationDuration) {
@@ -2431,15 +2431,6 @@ public class WebView extends AbsoluteLayout
if ((dx | dy) == 0) {
return false;
}
// By this point we have added in the title bar's height. If the site
// is trying to scroll to the top of the page, scroll it to the top
// of the WebView including showing the title bar.
// mobile sites prefer to scroll to (0, 1), thus the + 1 below
if (getVisibleTitleHeight() > 0 && x == 0
&& y <= getTitleHeight() + 1) {
y = 0;
animate = false;
}
if (animate) {
// Log.d(LOGTAG, "startScroll: " + dx + " " + dy);
mScroller.startScroll(mScrollX, mScrollY, dx, dy,
@@ -2502,6 +2493,17 @@ public class WebView extends AbsoluteLayout
int vy = contentToViewY(cy);
// Log.d(LOGTAG, "content scrollTo [" + cx + " " + cy + "] view=[" +
// vx + " " + vy + "]");
// Some mobile sites attempt to scroll the title bar off the page by
// scrolling to (0,0) or (0,1). If we are at the top left corner of the
// page, assume this is an attempt to scroll off the title bar, and
// animate the title bar off screen slowly enough that the user can see
// it.
if (cx == 0 && cy <= 1 && mScrollX == 0 && mScrollY == 0) {
pinScrollTo(vx, vy, true, SLIDE_TITLE_DURATION);
// Since we are animating, we have not yet reached the desired
// scroll position. Do not return true to request another attempt
return false;
}
pinScrollTo(vx, vy, false, 0);
// If the request was to scroll to a negative coordinate, treat it as if
// it was a request to scroll to 0