/// <summary>
/// Make a layout for the transformed text (password transformation
/// being the primary example of a transformation)
/// that will be updated as the base text is changed.
/// </summary>
/// <remarks>
/// Make a layout for the transformed text (password transformation
/// being the primary example of a transformation)
/// that will be updated as the base text is changed.
/// If ellipsize is non-null, the Layout will ellipsize the text
/// down to ellipsizedWidth.
/// *
/// *@hide
/// </remarks>
public DynamicLayout(java.lang.CharSequence @base, java.lang.CharSequence display
, android.text.TextPaint paint, int width, android.text.Layout.Alignment?align,
android.text.TextDirectionHeuristic textDir, float spacingmult, float spacingadd
, bool includepad, android.text.TextUtils.TruncateAt?ellipsize_1, int ellipsizedWidth
) : base((ellipsize_1 == null) ? display : (display is android.text.Spanned) ? new
android.text.Layout.SpannedEllipsizer(display) : new android.text.Layout.Ellipsizer
(display), paint, width, align, textDir, spacingmult, spacingadd)
{
mBase = @base;
mDisplay = display;
if (ellipsize_1 != null)
{
mInts = new android.text.PackedIntVector(COLUMNS_ELLIPSIZE);
mEllipsizedWidth = ellipsizedWidth;
mEllipsizeAt = ellipsize_1;
}
else
{
mInts = new android.text.PackedIntVector(COLUMNS_NORMAL);
mEllipsizedWidth = width;
mEllipsizeAt = null;
}
mObjects = new android.text.PackedObjectVector <android.text.Layout.Directions>(1);
mIncludePad = includepad;
if (ellipsize_1 != null)
{
android.text.Layout.Ellipsizer e = (android.text.Layout.Ellipsizer)getText();
e.mLayout = this;
e.mWidth = ellipsizedWidth;
e.mMethod = ellipsize_1;
mEllipsize = true;
}
// Initial state is a single line with 0 characters (0 to 0),
// with top at 0 and bottom at whatever is natural, and
// undefined ellipsis.
int[] start;
if (ellipsize_1 != null)
{
start = new int[COLUMNS_ELLIPSIZE];
start[ELLIPSIS_START] = ELLIPSIS_UNDEFINED;
}
else
{
start = new int[COLUMNS_NORMAL];
}
android.text.Layout.Directions[] dirs = new android.text.Layout.Directions[] { DIRS_ALL_LEFT_TO_RIGHT };
android.graphics.Paint.FontMetricsInt fm = paint.getFontMetricsInt();
int asc = fm.ascent;
int desc = fm.descent;
start[DIR] = DIR_LEFT_TO_RIGHT << DIR_SHIFT;
start[TOP] = 0;
start[DESCENT] = desc;
mInts.insertAt(0, start);
start[TOP] = desc - asc;
mInts.insertAt(1, start);
mObjects.insertAt(0, dirs);
// Update from 0 characters to whatever the real text is
reflow(@base, 0, 0, @base.Length);
if (@base is android.text.Spannable)
{
if (mWatcher == null)
{
mWatcher = new android.text.DynamicLayout.ChangeWatcher(this);
}
// Strip out any watchers for other DynamicLayouts.
android.text.Spannable sp = (android.text.Spannable)@base;
android.text.DynamicLayout.ChangeWatcher[] spans = sp.getSpans <android.text.DynamicLayout
.ChangeWatcher>(0, sp.Length);
{
for (int i = 0; i < spans.Length; i++)
{
sp.removeSpan(spans[i]);
}
}
sp.setSpan(mWatcher, 0, @base.Length, android.text.SpannedClass.SPAN_INCLUSIVE_INCLUSIVE
| (PRIORITY << android.text.SpannedClass.SPAN_PRIORITY_SHIFT));
}
}
/// <summary>
/// Make a layout for the transformed text (password transformation
/// being the primary example of a transformation)
/// that will be updated as the base text is changed.
/// </summary>
/// <remarks>
/// Make a layout for the transformed text (password transformation
/// being the primary example of a transformation)
/// that will be updated as the base text is changed.
/// If ellipsize is non-null, the Layout will ellipsize the text
/// down to ellipsizedWidth.
/// *
/// *@hide
/// </remarks>
public DynamicLayout(java.lang.CharSequence @base, java.lang.CharSequence display
, android.text.TextPaint paint, int width, android.text.Layout.Alignment? align,
android.text.TextDirectionHeuristic textDir, float spacingmult, float spacingadd
, bool includepad, android.text.TextUtils.TruncateAt? ellipsize_1, int ellipsizedWidth
) : base((ellipsize_1 == null) ? display : (display is android.text.Spanned) ? new
android.text.Layout.SpannedEllipsizer(display) : new android.text.Layout.Ellipsizer
(display), paint, width, align, textDir, spacingmult, spacingadd)
{
mBase = @base;
mDisplay = display;
if (ellipsize_1 != null)
{
mInts = new android.text.PackedIntVector(COLUMNS_ELLIPSIZE);
mEllipsizedWidth = ellipsizedWidth;
mEllipsizeAt = ellipsize_1;
}
else
{
mInts = new android.text.PackedIntVector(COLUMNS_NORMAL);
mEllipsizedWidth = width;
mEllipsizeAt = null;
}
mObjects = new android.text.PackedObjectVector<android.text.Layout.Directions>(1);
mIncludePad = includepad;
if (ellipsize_1 != null)
{
android.text.Layout.Ellipsizer e = (android.text.Layout.Ellipsizer)getText();
e.mLayout = this;
e.mWidth = ellipsizedWidth;
e.mMethod = ellipsize_1;
mEllipsize = true;
}
// Initial state is a single line with 0 characters (0 to 0),
// with top at 0 and bottom at whatever is natural, and
// undefined ellipsis.
int[] start;
if (ellipsize_1 != null)
{
start = new int[COLUMNS_ELLIPSIZE];
start[ELLIPSIS_START] = ELLIPSIS_UNDEFINED;
}
else
{
start = new int[COLUMNS_NORMAL];
}
android.text.Layout.Directions[] dirs = new android.text.Layout.Directions[] { DIRS_ALL_LEFT_TO_RIGHT
};
android.graphics.Paint.FontMetricsInt fm = paint.getFontMetricsInt();
int asc = fm.ascent;
int desc = fm.descent;
start[DIR] = DIR_LEFT_TO_RIGHT << DIR_SHIFT;
start[TOP] = 0;
start[DESCENT] = desc;
mInts.insertAt(0, start);
start[TOP] = desc - asc;
mInts.insertAt(1, start);
mObjects.insertAt(0, dirs);
// Update from 0 characters to whatever the real text is
reflow(@base, 0, 0, @base.Length);
if (@base is android.text.Spannable)
{
if (mWatcher == null)
{
mWatcher = new android.text.DynamicLayout.ChangeWatcher(this);
}
// Strip out any watchers for other DynamicLayouts.
android.text.Spannable sp = (android.text.Spannable)@base;
android.text.DynamicLayout.ChangeWatcher[] spans = sp.getSpans<android.text.DynamicLayout
.ChangeWatcher>(0, sp.Length);
{
for (int i = 0; i < spans.Length; i++)
{
sp.removeSpan(spans[i]);
}
}
sp.setSpan(mWatcher, 0, @base.Length, android.text.SpannedClass.SPAN_INCLUSIVE_INCLUSIVE
| (PRIORITY << android.text.SpannedClass.SPAN_PRIORITY_SHIFT));
}
}
private void reflow(java.lang.CharSequence s, int where, int before, int after)
{
if (s != mBase)
{
return;
}
java.lang.CharSequence text = mDisplay;
int len = text.Length;
// seek back to the start of the paragraph
int find = android.text.TextUtils.lastIndexOf(text, '\n', where - 1);
if (find < 0)
{
find = 0;
}
else
{
find = find + 1;
}
{
int diff = where - find;
before += diff;
after += diff;
where -= diff;
}
// seek forward to the end of the paragraph
int look = android.text.TextUtils.indexOf(text, '\n', where + after);
if (look < 0)
{
look = len;
}
else
{
look++;
}
// we want the index after the \n
int change = look - (where + after);
before += change;
after += change;
// seek further out to cover anything that is forced to wrap together
if (text is android.text.Spanned)
{
android.text.Spanned sp = (android.text.Spanned)text;
bool again;
do
{
again = false;
object[] force = sp.getSpans <android.text.style.WrapTogetherSpan>(where, where +
after);
{
for (int i = 0; i < force.Length; i++)
{
int st = sp.getSpanStart(force[i]);
int en = sp.getSpanEnd(force[i]);
if (st < where)
{
again = true;
int diff = where - st;
before += diff;
after += diff;
where -= diff;
}
if (en > where + after)
{
again = true;
int diff = en - (where + after);
before += diff;
after += diff;
}
}
}
}while (again);
}
// find affected region of old layout
int startline = getLineForOffset(where);
int startv = getLineTop(startline);
int endline = getLineForOffset(where + before);
if (where + after == len)
{
endline = getLineCount();
}
int endv = getLineTop(endline);
bool islast = (endline == getLineCount());
// generate new layout for affected text
android.text.StaticLayout reflowed;
lock (sLock)
{
reflowed = sStaticLayout;
sStaticLayout = null;
}
if (reflowed == null)
{
reflowed = new android.text.StaticLayout(null);
}
else
{
reflowed.prepare();
}
reflowed.generate(text, where, where + after, getPaint(), getWidth(), getAlignment
(), getTextDirectionHeuristic(), getSpacingMultiplier(), getSpacingAdd(), false,
true, mEllipsizedWidth, mEllipsizeAt);
int n = reflowed.getLineCount();
// If the new layout has a blank line at the end, but it is not
// the very end of the buffer, then we already have a line that
// starts there, so disregard the blank line.
if (where + after != len && reflowed.getLineStart(n - 1) == where + after)
{
n--;
}
// remove affected lines from old layout
mInts.deleteAt(startline, endline - startline);
mObjects.deleteAt(startline, endline - startline);
// adjust offsets in layout for new height and offsets
int ht = reflowed.getLineTop(n);
int toppad = 0;
int botpad = 0;
if (mIncludePad && startline == 0)
{
toppad = reflowed.getTopPadding();
mTopPadding = toppad;
ht -= toppad;
}
if (mIncludePad && islast)
{
botpad = reflowed.getBottomPadding();
mBottomPadding = botpad;
ht += botpad;
}
mInts.adjustValuesBelow(startline, START, after - before);
mInts.adjustValuesBelow(startline, TOP, startv - endv + ht);
// insert new layout
int[] ints;
if (mEllipsize)
{
ints = new int[COLUMNS_ELLIPSIZE];
ints[ELLIPSIS_START] = ELLIPSIS_UNDEFINED;
}
else
{
ints = new int[COLUMNS_NORMAL];
}
android.text.Layout.Directions[] objects = new android.text.Layout.Directions[1];
{
for (int i_1 = 0; i_1 < n; i_1++)
{
ints[START] = reflowed.getLineStart(i_1) | (reflowed.getParagraphDirection(i_1) <<
DIR_SHIFT) | (reflowed.getLineContainsTab(i_1) ? TAB_MASK : 0);
int top = reflowed.getLineTop(i_1) + startv;
if (i_1 > 0)
{
top -= toppad;
}
ints[TOP] = top;
int desc = reflowed.getLineDescent(i_1);
if (i_1 == n - 1)
{
desc += botpad;
}
ints[DESCENT] = desc;
objects[0] = reflowed.getLineDirections(i_1);
if (mEllipsize)
{
ints[ELLIPSIS_START] = reflowed.getEllipsisStart(i_1);
ints[ELLIPSIS_COUNT] = reflowed.getEllipsisCount(i_1);
}
mInts.insertAt(startline + i_1, ints);
mObjects.insertAt(startline + i_1, objects);
}
}
lock (sLock)
{
sStaticLayout = reflowed;
reflowed.finish();
}
}
private void reflow(java.lang.CharSequence s, int where, int before, int after)
{
if (s != mBase)
{
return;
}
java.lang.CharSequence text = mDisplay;
int len = text.Length;
// seek back to the start of the paragraph
int find = android.text.TextUtils.lastIndexOf(text, '\n', where - 1);
if (find < 0)
{
find = 0;
}
else
{
find = find + 1;
}
{
int diff = where - find;
before += diff;
after += diff;
where -= diff;
}
// seek forward to the end of the paragraph
int look = android.text.TextUtils.indexOf(text, '\n', where + after);
if (look < 0)
{
look = len;
}
else
{
look++;
}
// we want the index after the \n
int change = look - (where + after);
before += change;
after += change;
// seek further out to cover anything that is forced to wrap together
if (text is android.text.Spanned)
{
android.text.Spanned sp = (android.text.Spanned)text;
bool again;
do
{
again = false;
object[] force = sp.getSpans<android.text.style.WrapTogetherSpan>(where, where +
after);
{
for (int i = 0; i < force.Length; i++)
{
int st = sp.getSpanStart(force[i]);
int en = sp.getSpanEnd(force[i]);
if (st < where)
{
again = true;
int diff = where - st;
before += diff;
after += diff;
where -= diff;
}
if (en > where + after)
{
again = true;
int diff = en - (where + after);
before += diff;
after += diff;
}
}
}
}
while (again);
}
// find affected region of old layout
int startline = getLineForOffset(where);
int startv = getLineTop(startline);
int endline = getLineForOffset(where + before);
if (where + after == len)
{
endline = getLineCount();
}
int endv = getLineTop(endline);
bool islast = (endline == getLineCount());
// generate new layout for affected text
android.text.StaticLayout reflowed;
lock (sLock)
{
reflowed = sStaticLayout;
sStaticLayout = null;
}
if (reflowed == null)
{
reflowed = new android.text.StaticLayout(null);
}
else
{
reflowed.prepare();
}
reflowed.generate(text, where, where + after, getPaint(), getWidth(), getAlignment
(), getTextDirectionHeuristic(), getSpacingMultiplier(), getSpacingAdd(), false,
true, mEllipsizedWidth, mEllipsizeAt);
int n = reflowed.getLineCount();
// If the new layout has a blank line at the end, but it is not
// the very end of the buffer, then we already have a line that
// starts there, so disregard the blank line.
if (where + after != len && reflowed.getLineStart(n - 1) == where + after)
{
n--;
}
// remove affected lines from old layout
mInts.deleteAt(startline, endline - startline);
mObjects.deleteAt(startline, endline - startline);
// adjust offsets in layout for new height and offsets
int ht = reflowed.getLineTop(n);
int toppad = 0;
int botpad = 0;
if (mIncludePad && startline == 0)
{
toppad = reflowed.getTopPadding();
mTopPadding = toppad;
ht -= toppad;
}
if (mIncludePad && islast)
{
botpad = reflowed.getBottomPadding();
mBottomPadding = botpad;
ht += botpad;
}
mInts.adjustValuesBelow(startline, START, after - before);
mInts.adjustValuesBelow(startline, TOP, startv - endv + ht);
// insert new layout
int[] ints;
if (mEllipsize)
{
ints = new int[COLUMNS_ELLIPSIZE];
ints[ELLIPSIS_START] = ELLIPSIS_UNDEFINED;
}
else
{
ints = new int[COLUMNS_NORMAL];
}
android.text.Layout.Directions[] objects = new android.text.Layout.Directions[1];
{
for (int i_1 = 0; i_1 < n; i_1++)
{
ints[START] = reflowed.getLineStart(i_1) | (reflowed.getParagraphDirection(i_1) <<
DIR_SHIFT) | (reflowed.getLineContainsTab(i_1) ? TAB_MASK : 0);
int top = reflowed.getLineTop(i_1) + startv;
if (i_1 > 0)
{
top -= toppad;
}
ints[TOP] = top;
int desc = reflowed.getLineDescent(i_1);
if (i_1 == n - 1)
{
desc += botpad;
}
ints[DESCENT] = desc;
objects[0] = reflowed.getLineDirections(i_1);
if (mEllipsize)
{
ints[ELLIPSIS_START] = reflowed.getEllipsisStart(i_1);
ints[ELLIPSIS_COUNT] = reflowed.getEllipsisCount(i_1);
}
mInts.insertAt(startline + i_1, ints);
mObjects.insertAt(startline + i_1, objects);
}
}
lock (sLock)
{
sStaticLayout = reflowed;
reflowed.finish();
}
}
