| /* |
| * Copyright (C) 2006 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.text; |
| |
| import android.graphics.Canvas; |
| import android.graphics.Paint; |
| import android.util.Log; |
| |
| import com.android.internal.util.ArrayUtils; |
| |
| import java.lang.reflect.Array; |
| |
| /** |
| * This is the class for text whose content and markup can both be changed. |
| */ |
| public class SpannableStringBuilder implements CharSequence, GetChars, Spannable, Editable, |
| Appendable, GraphicsOperations { |
| /** |
| * Create a new SpannableStringBuilder with empty contents |
| */ |
| public SpannableStringBuilder() { |
| this(""); |
| } |
| |
| /** |
| * Create a new SpannableStringBuilder containing a copy of the |
| * specified text, including its spans if any. |
| */ |
| public SpannableStringBuilder(CharSequence text) { |
| this(text, 0, text.length()); |
| } |
| |
| /** |
| * Create a new SpannableStringBuilder containing a copy of the |
| * specified slice of the specified text, including its spans if any. |
| */ |
| public SpannableStringBuilder(CharSequence text, int start, int end) { |
| int srclen = end - start; |
| |
| if (srclen < 0) throw new StringIndexOutOfBoundsException(); |
| |
| int len = ArrayUtils.idealCharArraySize(srclen + 1); |
| mText = new char[len]; |
| mGapStart = srclen; |
| mGapLength = len - srclen; |
| |
| TextUtils.getChars(text, start, end, mText, 0); |
| |
| mSpanCount = 0; |
| int alloc = ArrayUtils.idealIntArraySize(0); |
| mSpans = new Object[alloc]; |
| mSpanStarts = new int[alloc]; |
| mSpanEnds = new int[alloc]; |
| mSpanFlags = new int[alloc]; |
| |
| if (text instanceof Spanned) { |
| Spanned sp = (Spanned) text; |
| Object[] spans = sp.getSpans(start, end, Object.class); |
| |
| for (int i = 0; i < spans.length; i++) { |
| if (spans[i] instanceof NoCopySpan) { |
| continue; |
| } |
| |
| int st = sp.getSpanStart(spans[i]) - start; |
| int en = sp.getSpanEnd(spans[i]) - start; |
| int fl = sp.getSpanFlags(spans[i]); |
| |
| if (st < 0) |
| st = 0; |
| if (st > end - start) |
| st = end - start; |
| |
| if (en < 0) |
| en = 0; |
| if (en > end - start) |
| en = end - start; |
| |
| setSpan(false, spans[i], st, en, fl); |
| } |
| } |
| } |
| |
| public static SpannableStringBuilder valueOf(CharSequence source) { |
| if (source instanceof SpannableStringBuilder) { |
| return (SpannableStringBuilder) source; |
| } else { |
| return new SpannableStringBuilder(source); |
| } |
| } |
| |
| /** |
| * Return the char at the specified offset within the buffer. |
| */ |
| public char charAt(int where) { |
| int len = length(); |
| if (where < 0) { |
| throw new IndexOutOfBoundsException("charAt: " + where + " < 0"); |
| } else if (where >= len) { |
| throw new IndexOutOfBoundsException("charAt: " + where + " >= length " + len); |
| } |
| |
| if (where >= mGapStart) |
| return mText[where + mGapLength]; |
| else |
| return mText[where]; |
| } |
| |
| /** |
| * Return the number of chars in the buffer. |
| */ |
| public int length() { |
| return mText.length - mGapLength; |
| } |
| |
| private void resizeFor(int size) { |
| final int oldLength = mText.length; |
| final int newLength = ArrayUtils.idealCharArraySize(size + 1); |
| final int delta = newLength - oldLength; |
| if (delta == 0) return; |
| |
| char[] newText = new char[newLength]; |
| System.arraycopy(mText, 0, newText, 0, mGapStart); |
| final int after = oldLength - (mGapStart + mGapLength); |
| System.arraycopy(mText, oldLength - after, newText, newLength - after, after); |
| mText = newText; |
| |
| mGapLength += delta; |
| if (mGapLength < 1) |
| new Exception("mGapLength < 1").printStackTrace(); |
| |
| for (int i = 0; i < mSpanCount; i++) { |
| if (mSpanStarts[i] > mGapStart) mSpanStarts[i] += delta; |
| if (mSpanEnds[i] > mGapStart) mSpanEnds[i] += delta; |
| } |
| } |
| |
| private void moveGapTo(int where) { |
| if (where == mGapStart) |
| return; |
| |
| boolean atEnd = (where == length()); |
| |
| if (where < mGapStart) { |
| int overlap = mGapStart - where; |
| System.arraycopy(mText, where, mText, mGapStart + mGapLength - overlap, overlap); |
| } else /* where > mGapStart */ { |
| int overlap = where - mGapStart; |
| System.arraycopy(mText, where + mGapLength - overlap, mText, mGapStart, overlap); |
| } |
| |
| // XXX be more clever |
| for (int i = 0; i < mSpanCount; i++) { |
| int start = mSpanStarts[i]; |
| int end = mSpanEnds[i]; |
| |
| if (start > mGapStart) |
| start -= mGapLength; |
| if (start > where) |
| start += mGapLength; |
| else if (start == where) { |
| int flag = (mSpanFlags[i] & START_MASK) >> START_SHIFT; |
| |
| if (flag == POINT || (atEnd && flag == PARAGRAPH)) |
| start += mGapLength; |
| } |
| |
| if (end > mGapStart) |
| end -= mGapLength; |
| if (end > where) |
| end += mGapLength; |
| else if (end == where) { |
| int flag = (mSpanFlags[i] & END_MASK); |
| |
| if (flag == POINT || (atEnd && flag == PARAGRAPH)) |
| end += mGapLength; |
| } |
| |
| mSpanStarts[i] = start; |
| mSpanEnds[i] = end; |
| } |
| |
| mGapStart = where; |
| } |
| |
| // Documentation from interface |
| public SpannableStringBuilder insert(int where, CharSequence tb, int start, int end) { |
| return replace(where, where, tb, start, end); |
| } |
| |
| // Documentation from interface |
| public SpannableStringBuilder insert(int where, CharSequence tb) { |
| return replace(where, where, tb, 0, tb.length()); |
| } |
| |
| // Documentation from interface |
| public SpannableStringBuilder delete(int start, int end) { |
| SpannableStringBuilder ret = replace(start, end, "", 0, 0); |
| |
| if (mGapLength > 2 * length()) |
| resizeFor(length()); |
| |
| return ret; // == this |
| } |
| |
| // Documentation from interface |
| public void clear() { |
| replace(0, length(), "", 0, 0); |
| } |
| |
| // Documentation from interface |
| public void clearSpans() { |
| for (int i = mSpanCount - 1; i >= 0; i--) { |
| Object what = mSpans[i]; |
| int ostart = mSpanStarts[i]; |
| int oend = mSpanEnds[i]; |
| |
| if (ostart > mGapStart) |
| ostart -= mGapLength; |
| if (oend > mGapStart) |
| oend -= mGapLength; |
| |
| mSpanCount = i; |
| mSpans[i] = null; |
| |
| sendSpanRemoved(what, ostart, oend); |
| } |
| } |
| |
| // Documentation from interface |
| public SpannableStringBuilder append(CharSequence text) { |
| int length = length(); |
| return replace(length, length, text, 0, text.length()); |
| } |
| |
| // Documentation from interface |
| public SpannableStringBuilder append(CharSequence text, int start, int end) { |
| int length = length(); |
| return replace(length, length, text, start, end); |
| } |
| |
| // Documentation from interface |
| public SpannableStringBuilder append(char text) { |
| return append(String.valueOf(text)); |
| } |
| |
| private void change(int start, int end, CharSequence cs, int csStart, int csEnd) { |
| // Can be negative |
| final int replacedLength = end - start; |
| final int replacementLength = csEnd - csStart; |
| final int nbNewChars = replacementLength - replacedLength; |
| |
| for (int i = mSpanCount - 1; i >= 0; i--) { |
| int spanStart = mSpanStarts[i]; |
| if (spanStart > mGapStart) |
| spanStart -= mGapLength; |
| |
| int spanEnd = mSpanEnds[i]; |
| if (spanEnd > mGapStart) |
| spanEnd -= mGapLength; |
| |
| if ((mSpanFlags[i] & SPAN_PARAGRAPH) == SPAN_PARAGRAPH) { |
| int ost = spanStart; |
| int oen = spanEnd; |
| int clen = length(); |
| |
| if (spanStart > start && spanStart <= end) { |
| for (spanStart = end; spanStart < clen; spanStart++) |
| if (spanStart > end && charAt(spanStart - 1) == '\n') |
| break; |
| } |
| |
| if (spanEnd > start && spanEnd <= end) { |
| for (spanEnd = end; spanEnd < clen; spanEnd++) |
| if (spanEnd > end && charAt(spanEnd - 1) == '\n') |
| break; |
| } |
| |
| if (spanStart != ost || spanEnd != oen) |
| setSpan(false, mSpans[i], spanStart, spanEnd, mSpanFlags[i]); |
| } |
| |
| int flags = 0; |
| if (spanStart == start) flags |= SPAN_START_AT_START; |
| else if (spanStart == end + nbNewChars) flags |= SPAN_START_AT_END; |
| if (spanEnd == start) flags |= SPAN_END_AT_START; |
| else if (spanEnd == end + nbNewChars) flags |= SPAN_END_AT_END; |
| mSpanFlags[i] |= flags; |
| } |
| |
| moveGapTo(end); |
| |
| if (nbNewChars >= mGapLength) { |
| resizeFor(mText.length + nbNewChars - mGapLength); |
| } |
| |
| final boolean textIsRemoved = replacementLength == 0; |
| // The removal pass needs to be done before the gap is updated in order to broadcast the |
| // correct previous positions to the correct intersecting SpanWatchers |
| if (replacedLength > 0) { // no need for span fixup on pure insertion |
| // A for loop will not work because the array is being modified |
| // Do not iterate in reverse to keep the SpanWatchers notified in ordering |
| // Also, a removed SpanWatcher should not get notified of removed spans located |
| // further in the span array. |
| int i = 0; |
| while (i < mSpanCount) { |
| if ((mSpanFlags[i] & Spanned.SPAN_EXCLUSIVE_EXCLUSIVE) == |
| Spanned.SPAN_EXCLUSIVE_EXCLUSIVE && |
| mSpanStarts[i] >= start && mSpanStarts[i] < mGapStart + mGapLength && |
| mSpanEnds[i] >= start && mSpanEnds[i] < mGapStart + mGapLength && |
| // This condition indicates that the span would become empty |
| (textIsRemoved || mSpanStarts[i] > start || mSpanEnds[i] < mGapStart)) { |
| removeSpan(i); |
| continue; // do not increment i, spans will be shifted left in the array |
| } |
| |
| i++; |
| } |
| } |
| |
| mGapStart += nbNewChars; |
| mGapLength -= nbNewChars; |
| |
| if (mGapLength < 1) |
| new Exception("mGapLength < 1").printStackTrace(); |
| |
| TextUtils.getChars(cs, csStart, csEnd, mText, start); |
| |
| if (replacedLength > 0) { // no need for span fixup on pure insertion |
| final boolean atEnd = (mGapStart + mGapLength == mText.length); |
| |
| for (int i = 0; i < mSpanCount; i++) { |
| final int startFlag = (mSpanFlags[i] & START_MASK) >> START_SHIFT; |
| mSpanStarts[i] = updatedIntervalBound(mSpanStarts[i], start, nbNewChars, startFlag, |
| atEnd, textIsRemoved); |
| |
| final int endFlag = (mSpanFlags[i] & END_MASK); |
| mSpanEnds[i] = updatedIntervalBound(mSpanEnds[i], start, nbNewChars, endFlag, |
| atEnd, textIsRemoved); |
| } |
| } |
| |
| mSpanCountBeforeAdd = mSpanCount; |
| |
| if (cs instanceof Spanned) { |
| Spanned sp = (Spanned) cs; |
| Object[] spans = sp.getSpans(csStart, csEnd, Object.class); |
| |
| for (int i = 0; i < spans.length; i++) { |
| int st = sp.getSpanStart(spans[i]); |
| int en = sp.getSpanEnd(spans[i]); |
| |
| if (st < csStart) st = csStart; |
| if (en > csEnd) en = csEnd; |
| |
| // Add span only if this object is not yet used as a span in this string |
| if (getSpanStart(spans[i]) < 0) { |
| setSpan(false, spans[i], st - csStart + start, en - csStart + start, |
| sp.getSpanFlags(spans[i])); |
| } |
| } |
| } |
| } |
| |
| private int updatedIntervalBound(int offset, int start, int nbNewChars, int flag, boolean atEnd, |
| boolean textIsRemoved) { |
| if (offset >= start && offset < mGapStart + mGapLength) { |
| if (flag == POINT) { |
| // A POINT located inside the replaced range should be moved to the end of the |
| // replaced text. |
| // The exception is when the point is at the start of the range and we are doing a |
| // text replacement (as opposed to a deletion): the point stays there. |
| if (textIsRemoved || offset > start) { |
| return mGapStart + mGapLength; |
| } |
| } else { |
| if (flag == PARAGRAPH) { |
| if (atEnd) { |
| return mGapStart + mGapLength; |
| } |
| } else { // MARK |
| // MARKs should be moved to the start, with the exception of a mark located at |
| // the end of the range (which will be < mGapStart + mGapLength since mGapLength |
| // is > 0, which should stay 'unchanged' at the end of the replaced text. |
| if (textIsRemoved || offset < mGapStart - nbNewChars) { |
| return start; |
| } else { |
| // Move to the end of replaced text (needed if nbNewChars != 0) |
| return mGapStart; |
| } |
| } |
| } |
| } |
| return offset; |
| } |
| |
| private void removeSpan(int i) { |
| Object object = mSpans[i]; |
| |
| int start = mSpanStarts[i]; |
| int end = mSpanEnds[i]; |
| |
| if (start > mGapStart) start -= mGapLength; |
| if (end > mGapStart) end -= mGapLength; |
| |
| int count = mSpanCount - (i + 1); |
| System.arraycopy(mSpans, i + 1, mSpans, i, count); |
| System.arraycopy(mSpanStarts, i + 1, mSpanStarts, i, count); |
| System.arraycopy(mSpanEnds, i + 1, mSpanEnds, i, count); |
| System.arraycopy(mSpanFlags, i + 1, mSpanFlags, i, count); |
| |
| mSpanCount--; |
| |
| mSpans[mSpanCount] = null; |
| |
| sendSpanRemoved(object, start, end); |
| } |
| |
| // Documentation from interface |
| public SpannableStringBuilder replace(int start, int end, CharSequence tb) { |
| return replace(start, end, tb, 0, tb.length()); |
| } |
| |
| // Documentation from interface |
| public SpannableStringBuilder replace(final int start, final int end, |
| CharSequence tb, int tbstart, int tbend) { |
| checkRange("replace", start, end); |
| |
| int filtercount = mFilters.length; |
| for (int i = 0; i < filtercount; i++) { |
| CharSequence repl = mFilters[i].filter(tb, tbstart, tbend, this, start, end); |
| |
| if (repl != null) { |
| tb = repl; |
| tbstart = 0; |
| tbend = repl.length(); |
| } |
| } |
| |
| final int origLen = end - start; |
| final int newLen = tbend - tbstart; |
| |
| if (origLen == 0 && newLen == 0 && !hasNonExclusiveExclusiveSpanAt(tb, tbstart)) { |
| // This is a no-op iif there are no spans in tb that would be added (with a 0-length) |
| // Early exit so that the text watchers do not get notified |
| return this; |
| } |
| |
| TextWatcher[] textWatchers = getSpans(start, start + origLen, TextWatcher.class); |
| sendBeforeTextChanged(textWatchers, start, origLen, newLen); |
| |
| // Try to keep the cursor / selection at the same relative position during |
| // a text replacement. If replaced or replacement text length is zero, this |
| // is already taken care of. |
| boolean adjustSelection = origLen != 0 && newLen != 0; |
| int selectionStart = 0; |
| int selectionEnd = 0; |
| if (adjustSelection) { |
| selectionStart = Selection.getSelectionStart(this); |
| selectionEnd = Selection.getSelectionEnd(this); |
| } |
| |
| change(start, end, tb, tbstart, tbend); |
| |
| if (adjustSelection) { |
| if (selectionStart > start && selectionStart < end) { |
| final int offset = (selectionStart - start) * newLen / origLen; |
| selectionStart = start + offset; |
| |
| setSpan(false, Selection.SELECTION_START, selectionStart, selectionStart, |
| Spanned.SPAN_POINT_POINT); |
| } |
| if (selectionEnd > start && selectionEnd < end) { |
| final int offset = (selectionEnd - start) * newLen / origLen; |
| selectionEnd = start + offset; |
| |
| setSpan(false, Selection.SELECTION_END, selectionEnd, selectionEnd, |
| Spanned.SPAN_POINT_POINT); |
| } |
| } |
| |
| sendTextChanged(textWatchers, start, origLen, newLen); |
| sendAfterTextChanged(textWatchers); |
| |
| // Span watchers need to be called after text watchers, which may update the layout |
| sendToSpanWatchers(start, end, newLen - origLen); |
| |
| return this; |
| } |
| |
| private static boolean hasNonExclusiveExclusiveSpanAt(CharSequence text, int offset) { |
| if (text instanceof Spanned) { |
| Spanned spanned = (Spanned) text; |
| Object[] spans = spanned.getSpans(offset, offset, Object.class); |
| final int length = spans.length; |
| for (int i = 0; i < length; i++) { |
| Object span = spans[i]; |
| int flags = spanned.getSpanFlags(span); |
| if (flags != Spanned.SPAN_EXCLUSIVE_EXCLUSIVE) return true; |
| } |
| } |
| return false; |
| } |
| |
| private void sendToSpanWatchers(int replaceStart, int replaceEnd, int nbNewChars) { |
| for (int i = 0; i < mSpanCountBeforeAdd; i++) { |
| int spanStart = mSpanStarts[i]; |
| int spanEnd = mSpanEnds[i]; |
| if (spanStart > mGapStart) spanStart -= mGapLength; |
| if (spanEnd > mGapStart) spanEnd -= mGapLength; |
| int spanFlags = mSpanFlags[i]; |
| |
| int newReplaceEnd = replaceEnd + nbNewChars; |
| boolean spanChanged = false; |
| |
| int previousSpanStart = spanStart; |
| if (spanStart > newReplaceEnd) { |
| if (nbNewChars != 0) { |
| previousSpanStart -= nbNewChars; |
| spanChanged = true; |
| } |
| } else if (spanStart >= replaceStart) { |
| // No change if span start was already at replace interval boundaries before replace |
| if ((spanStart != replaceStart || |
| ((spanFlags & SPAN_START_AT_START) != SPAN_START_AT_START)) && |
| (spanStart != newReplaceEnd || |
| ((spanFlags & SPAN_START_AT_END) != SPAN_START_AT_END))) { |
| // TODO A correct previousSpanStart cannot be computed at this point. |
| // It would require to save all the previous spans' positions before the replace |
| // Using an invalid -1 value to convey this would break the broacast range |
| spanChanged = true; |
| } |
| } |
| |
| int previousSpanEnd = spanEnd; |
| if (spanEnd > newReplaceEnd) { |
| if (nbNewChars != 0) { |
| previousSpanEnd -= nbNewChars; |
| spanChanged = true; |
| } |
| } else if (spanEnd >= replaceStart) { |
| // No change if span start was already at replace interval boundaries before replace |
| if ((spanEnd != replaceStart || |
| ((spanFlags & SPAN_END_AT_START) != SPAN_END_AT_START)) && |
| (spanEnd != newReplaceEnd || |
| ((spanFlags & SPAN_END_AT_END) != SPAN_END_AT_END))) { |
| // TODO same as above for previousSpanEnd |
| spanChanged = true; |
| } |
| } |
| |
| if (spanChanged) { |
| sendSpanChanged(mSpans[i], previousSpanStart, previousSpanEnd, spanStart, spanEnd); |
| } |
| mSpanFlags[i] &= ~SPAN_START_END_MASK; |
| } |
| |
| // The spans starting at mIntermediateSpanCount were added from the replacement text |
| for (int i = mSpanCountBeforeAdd; i < mSpanCount; i++) { |
| int spanStart = mSpanStarts[i]; |
| int spanEnd = mSpanEnds[i]; |
| if (spanStart > mGapStart) spanStart -= mGapLength; |
| if (spanEnd > mGapStart) spanEnd -= mGapLength; |
| sendSpanAdded(mSpans[i], spanStart, spanEnd); |
| } |
| } |
| |
| /** |
| * Mark the specified range of text with the specified object. |
| * The flags determine how the span will behave when text is |
| * inserted at the start or end of the span's range. |
| */ |
| public void setSpan(Object what, int start, int end, int flags) { |
| setSpan(true, what, start, end, flags); |
| } |
| |
| private void setSpan(boolean send, Object what, int start, int end, int flags) { |
| checkRange("setSpan", start, end); |
| |
| int flagsStart = (flags & START_MASK) >> START_SHIFT; |
| if (flagsStart == PARAGRAPH) { |
| if (start != 0 && start != length()) { |
| char c = charAt(start - 1); |
| |
| if (c != '\n') |
| throw new RuntimeException("PARAGRAPH span must start at paragraph boundary"); |
| } |
| } |
| |
| int flagsEnd = flags & END_MASK; |
| if (flagsEnd == PARAGRAPH) { |
| if (end != 0 && end != length()) { |
| char c = charAt(end - 1); |
| |
| if (c != '\n') |
| throw new RuntimeException("PARAGRAPH span must end at paragraph boundary"); |
| } |
| } |
| |
| // 0-length Spanned.SPAN_EXCLUSIVE_EXCLUSIVE |
| if (flagsStart == POINT && flagsEnd == MARK && start == end) { |
| if (send) Log.e("SpannableStringBuilder", |
| "SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length"); |
| // Silently ignore invalid spans when they are created from this class. |
| // This avoids the duplication of the above test code before all the |
| // calls to setSpan that are done in this class |
| return; |
| } |
| |
| int nstart = start; |
| int nend = end; |
| |
| if (start > mGapStart) { |
| start += mGapLength; |
| } else if (start == mGapStart) { |
| if (flagsStart == POINT || (flagsStart == PARAGRAPH && start == length())) |
| start += mGapLength; |
| } |
| |
| if (end > mGapStart) { |
| end += mGapLength; |
| } else if (end == mGapStart) { |
| if (flagsEnd == POINT || (flagsEnd == PARAGRAPH && end == length())) |
| end += mGapLength; |
| } |
| |
| int count = mSpanCount; |
| Object[] spans = mSpans; |
| |
| for (int i = 0; i < count; i++) { |
| if (spans[i] == what) { |
| int ostart = mSpanStarts[i]; |
| int oend = mSpanEnds[i]; |
| |
| if (ostart > mGapStart) |
| ostart -= mGapLength; |
| if (oend > mGapStart) |
| oend -= mGapLength; |
| |
| mSpanStarts[i] = start; |
| mSpanEnds[i] = end; |
| mSpanFlags[i] = flags; |
| |
| if (send) sendSpanChanged(what, ostart, oend, nstart, nend); |
| |
| return; |
| } |
| } |
| |
| if (mSpanCount + 1 >= mSpans.length) { |
| int newsize = ArrayUtils.idealIntArraySize(mSpanCount + 1); |
| Object[] newspans = new Object[newsize]; |
| int[] newspanstarts = new int[newsize]; |
| int[] newspanends = new int[newsize]; |
| int[] newspanflags = new int[newsize]; |
| |
| System.arraycopy(mSpans, 0, newspans, 0, mSpanCount); |
| System.arraycopy(mSpanStarts, 0, newspanstarts, 0, mSpanCount); |
| System.arraycopy(mSpanEnds, 0, newspanends, 0, mSpanCount); |
| System.arraycopy(mSpanFlags, 0, newspanflags, 0, mSpanCount); |
| |
| mSpans = newspans; |
| mSpanStarts = newspanstarts; |
| mSpanEnds = newspanends; |
| mSpanFlags = newspanflags; |
| } |
| |
| mSpans[mSpanCount] = what; |
| mSpanStarts[mSpanCount] = start; |
| mSpanEnds[mSpanCount] = end; |
| mSpanFlags[mSpanCount] = flags; |
| mSpanCount++; |
| |
| if (send) sendSpanAdded(what, nstart, nend); |
| } |
| |
| /** |
| * Remove the specified markup object from the buffer. |
| */ |
| public void removeSpan(Object what) { |
| for (int i = mSpanCount - 1; i >= 0; i--) { |
| if (mSpans[i] == what) { |
| removeSpan(i); |
| return; |
| } |
| } |
| } |
| |
| /** |
| * Return the buffer offset of the beginning of the specified |
| * markup object, or -1 if it is not attached to this buffer. |
| */ |
| public int getSpanStart(Object what) { |
| int count = mSpanCount; |
| Object[] spans = mSpans; |
| |
| for (int i = count - 1; i >= 0; i--) { |
| if (spans[i] == what) { |
| int where = mSpanStarts[i]; |
| |
| if (where > mGapStart) |
| where -= mGapLength; |
| |
| return where; |
| } |
| } |
| |
| return -1; |
| } |
| |
| /** |
| * Return the buffer offset of the end of the specified |
| * markup object, or -1 if it is not attached to this buffer. |
| */ |
| public int getSpanEnd(Object what) { |
| int count = mSpanCount; |
| Object[] spans = mSpans; |
| |
| for (int i = count - 1; i >= 0; i--) { |
| if (spans[i] == what) { |
| int where = mSpanEnds[i]; |
| |
| if (where > mGapStart) |
| where -= mGapLength; |
| |
| return where; |
| } |
| } |
| |
| return -1; |
| } |
| |
| /** |
| * Return the flags of the end of the specified |
| * markup object, or 0 if it is not attached to this buffer. |
| */ |
| public int getSpanFlags(Object what) { |
| int count = mSpanCount; |
| Object[] spans = mSpans; |
| |
| for (int i = count - 1; i >= 0; i--) { |
| if (spans[i] == what) { |
| return mSpanFlags[i]; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * Return an array of the spans of the specified type that overlap |
| * the specified range of the buffer. The kind may be Object.class to get |
| * a list of all the spans regardless of type. |
| */ |
| @SuppressWarnings("unchecked") |
| public <T> T[] getSpans(int queryStart, int queryEnd, Class<T> kind) { |
| if (kind == null) return ArrayUtils.emptyArray(kind); |
| |
| int spanCount = mSpanCount; |
| Object[] spans = mSpans; |
| int[] starts = mSpanStarts; |
| int[] ends = mSpanEnds; |
| int[] flags = mSpanFlags; |
| int gapstart = mGapStart; |
| int gaplen = mGapLength; |
| |
| int count = 0; |
| T[] ret = null; |
| T ret1 = null; |
| |
| for (int i = 0; i < spanCount; i++) { |
| int spanStart = starts[i]; |
| if (spanStart > gapstart) { |
| spanStart -= gaplen; |
| } |
| if (spanStart > queryEnd) { |
| continue; |
| } |
| |
| int spanEnd = ends[i]; |
| if (spanEnd > gapstart) { |
| spanEnd -= gaplen; |
| } |
| if (spanEnd < queryStart) { |
| continue; |
| } |
| |
| if (spanStart != spanEnd && queryStart != queryEnd) { |
| if (spanStart == queryEnd) |
| continue; |
| if (spanEnd == queryStart) |
| continue; |
| } |
| |
| // Expensive test, should be performed after the previous tests |
| if (!kind.isInstance(spans[i])) continue; |
| |
| if (count == 0) { |
| // Safe conversion thanks to the isInstance test above |
| ret1 = (T) spans[i]; |
| count++; |
| } else { |
| if (count == 1) { |
| // Safe conversion, but requires a suppressWarning |
| ret = (T[]) Array.newInstance(kind, spanCount - i + 1); |
| ret[0] = ret1; |
| } |
| |
| int prio = flags[i] & SPAN_PRIORITY; |
| if (prio != 0) { |
| int j; |
| |
| for (j = 0; j < count; j++) { |
| int p = getSpanFlags(ret[j]) & SPAN_PRIORITY; |
| |
| if (prio > p) { |
| break; |
| } |
| } |
| |
| System.arraycopy(ret, j, ret, j + 1, count - j); |
| // Safe conversion thanks to the isInstance test above |
| ret[j] = (T) spans[i]; |
| count++; |
| } else { |
| // Safe conversion thanks to the isInstance test above |
| ret[count++] = (T) spans[i]; |
| } |
| } |
| } |
| |
| if (count == 0) { |
| return ArrayUtils.emptyArray(kind); |
| } |
| if (count == 1) { |
| // Safe conversion, but requires a suppressWarning |
| ret = (T[]) Array.newInstance(kind, 1); |
| ret[0] = ret1; |
| return ret; |
| } |
| if (count == ret.length) { |
| return ret; |
| } |
| |
| // Safe conversion, but requires a suppressWarning |
| T[] nret = (T[]) Array.newInstance(kind, count); |
| System.arraycopy(ret, 0, nret, 0, count); |
| return nret; |
| } |
| |
| /** |
| * Return the next offset after <code>start</code> but less than or |
| * equal to <code>limit</code> where a span of the specified type |
| * begins or ends. |
| */ |
| public int nextSpanTransition(int start, int limit, Class kind) { |
| int count = mSpanCount; |
| Object[] spans = mSpans; |
| int[] starts = mSpanStarts; |
| int[] ends = mSpanEnds; |
| int gapstart = mGapStart; |
| int gaplen = mGapLength; |
| |
| if (kind == null) { |
| kind = Object.class; |
| } |
| |
| for (int i = 0; i < count; i++) { |
| int st = starts[i]; |
| int en = ends[i]; |
| |
| if (st > gapstart) |
| st -= gaplen; |
| if (en > gapstart) |
| en -= gaplen; |
| |
| if (st > start && st < limit && kind.isInstance(spans[i])) |
| limit = st; |
| if (en > start && en < limit && kind.isInstance(spans[i])) |
| limit = en; |
| } |
| |
| return limit; |
| } |
| |
| /** |
| * Return a new CharSequence containing a copy of the specified |
| * range of this buffer, including the overlapping spans. |
| */ |
| public CharSequence subSequence(int start, int end) { |
| return new SpannableStringBuilder(this, start, end); |
| } |
| |
| /** |
| * Copy the specified range of chars from this buffer into the |
| * specified array, beginning at the specified offset. |
| */ |
| public void getChars(int start, int end, char[] dest, int destoff) { |
| checkRange("getChars", start, end); |
| |
| if (end <= mGapStart) { |
| System.arraycopy(mText, start, dest, destoff, end - start); |
| } else if (start >= mGapStart) { |
| System.arraycopy(mText, start + mGapLength, dest, destoff, end - start); |
| } else { |
| System.arraycopy(mText, start, dest, destoff, mGapStart - start); |
| System.arraycopy(mText, mGapStart + mGapLength, |
| dest, destoff + (mGapStart - start), |
| end - mGapStart); |
| } |
| } |
| |
| /** |
| * Return a String containing a copy of the chars in this buffer. |
| */ |
| @Override |
| public String toString() { |
| int len = length(); |
| char[] buf = new char[len]; |
| |
| getChars(0, len, buf, 0); |
| return new String(buf); |
| } |
| |
| /** |
| * Return a String containing a copy of the chars in this buffer, limited to the |
| * [start, end[ range. |
| * @hide |
| */ |
| public String substring(int start, int end) { |
| char[] buf = new char[end - start]; |
| getChars(start, end, buf, 0); |
| return new String(buf); |
| } |
| |
| private void sendBeforeTextChanged(TextWatcher[] watchers, int start, int before, int after) { |
| int n = watchers.length; |
| |
| for (int i = 0; i < n; i++) { |
| watchers[i].beforeTextChanged(this, start, before, after); |
| } |
| } |
| |
| private void sendTextChanged(TextWatcher[] watchers, int start, int before, int after) { |
| int n = watchers.length; |
| |
| for (int i = 0; i < n; i++) { |
| watchers[i].onTextChanged(this, start, before, after); |
| } |
| } |
| |
| private void sendAfterTextChanged(TextWatcher[] watchers) { |
| int n = watchers.length; |
| |
| for (int i = 0; i < n; i++) { |
| watchers[i].afterTextChanged(this); |
| } |
| } |
| |
| private void sendSpanAdded(Object what, int start, int end) { |
| SpanWatcher[] recip = getSpans(start, end, SpanWatcher.class); |
| int n = recip.length; |
| |
| for (int i = 0; i < n; i++) { |
| recip[i].onSpanAdded(this, what, start, end); |
| } |
| } |
| |
| private void sendSpanRemoved(Object what, int start, int end) { |
| SpanWatcher[] recip = getSpans(start, end, SpanWatcher.class); |
| int n = recip.length; |
| |
| for (int i = 0; i < n; i++) { |
| recip[i].onSpanRemoved(this, what, start, end); |
| } |
| } |
| |
| private void sendSpanChanged(Object what, int oldStart, int oldEnd, int start, int end) { |
| // The bounds of a possible SpanWatcher are guaranteed to be set before this method is |
| // called, so that the order of the span does not affect this broadcast. |
| SpanWatcher[] spanWatchers = getSpans(Math.min(oldStart, start), |
| Math.min(Math.max(oldEnd, end), length()), SpanWatcher.class); |
| int n = spanWatchers.length; |
| for (int i = 0; i < n; i++) { |
| spanWatchers[i].onSpanChanged(this, what, oldStart, oldEnd, start, end); |
| } |
| } |
| |
| private static String region(int start, int end) { |
| return "(" + start + " ... " + end + ")"; |
| } |
| |
| private void checkRange(final String operation, int start, int end) { |
| if (end < start) { |
| throw new IndexOutOfBoundsException(operation + " " + |
| region(start, end) + " has end before start"); |
| } |
| |
| int len = length(); |
| |
| if (start > len || end > len) { |
| throw new IndexOutOfBoundsException(operation + " " + |
| region(start, end) + " ends beyond length " + len); |
| } |
| |
| if (start < 0 || end < 0) { |
| throw new IndexOutOfBoundsException(operation + " " + |
| region(start, end) + " starts before 0"); |
| } |
| } |
| |
| /* |
| private boolean isprint(char c) { // XXX |
| if (c >= ' ' && c <= '~') |
| return true; |
| else |
| return false; |
| } |
| |
| private static final int startFlag(int flag) { |
| return (flag >> 4) & 0x0F; |
| } |
| |
| private static final int endFlag(int flag) { |
| return flag & 0x0F; |
| } |
| |
| public void dump() { // XXX |
| for (int i = 0; i < mGapStart; i++) { |
| System.out.print('|'); |
| System.out.print(' '); |
| System.out.print(isprint(mText[i]) ? mText[i] : '.'); |
| System.out.print(' '); |
| } |
| |
| for (int i = mGapStart; i < mGapStart + mGapLength; i++) { |
| System.out.print('|'); |
| System.out.print('('); |
| System.out.print(isprint(mText[i]) ? mText[i] : '.'); |
| System.out.print(')'); |
| } |
| |
| for (int i = mGapStart + mGapLength; i < mText.length; i++) { |
| System.out.print('|'); |
| System.out.print(' '); |
| System.out.print(isprint(mText[i]) ? mText[i] : '.'); |
| System.out.print(' '); |
| } |
| |
| System.out.print('\n'); |
| |
| for (int i = 0; i < mText.length + 1; i++) { |
| int found = 0; |
| int wfound = 0; |
| |
| for (int j = 0; j < mSpanCount; j++) { |
| if (mSpanStarts[j] == i) { |
| found = 1; |
| wfound = j; |
| break; |
| } |
| |
| if (mSpanEnds[j] == i) { |
| found = 2; |
| wfound = j; |
| break; |
| } |
| } |
| |
| if (found == 1) { |
| if (startFlag(mSpanFlags[wfound]) == MARK) |
| System.out.print("( "); |
| if (startFlag(mSpanFlags[wfound]) == PARAGRAPH) |
| System.out.print("< "); |
| else |
| System.out.print("[ "); |
| } else if (found == 2) { |
| if (endFlag(mSpanFlags[wfound]) == POINT) |
| System.out.print(") "); |
| if (endFlag(mSpanFlags[wfound]) == PARAGRAPH) |
| System.out.print("> "); |
| else |
| System.out.print("] "); |
| } else { |
| System.out.print(" "); |
| } |
| } |
| |
| System.out.print("\n"); |
| } |
| */ |
| |
| /** |
| * Don't call this yourself -- exists for Canvas to use internally. |
| * {@hide} |
| */ |
| public void drawText(Canvas c, int start, int end, float x, float y, Paint p) { |
| checkRange("drawText", start, end); |
| |
| if (end <= mGapStart) { |
| c.drawText(mText, start, end - start, x, y, p); |
| } else if (start >= mGapStart) { |
| c.drawText(mText, start + mGapLength, end - start, x, y, p); |
| } else { |
| char[] buf = TextUtils.obtain(end - start); |
| |
| getChars(start, end, buf, 0); |
| c.drawText(buf, 0, end - start, x, y, p); |
| TextUtils.recycle(buf); |
| } |
| } |
| |
| |
| /** |
| * Don't call this yourself -- exists for Canvas to use internally. |
| * {@hide} |
| */ |
| public void drawTextRun(Canvas c, int start, int end, int contextStart, int contextEnd, |
| float x, float y, int flags, Paint p) { |
| checkRange("drawTextRun", start, end); |
| |
| int contextLen = contextEnd - contextStart; |
| int len = end - start; |
| if (contextEnd <= mGapStart) { |
| c.drawTextRun(mText, start, len, contextStart, contextLen, x, y, flags, p); |
| } else if (contextStart >= mGapStart) { |
| c.drawTextRun(mText, start + mGapLength, len, contextStart + mGapLength, |
| contextLen, x, y, flags, p); |
| } else { |
| char[] buf = TextUtils.obtain(contextLen); |
| getChars(contextStart, contextEnd, buf, 0); |
| c.drawTextRun(buf, start - contextStart, len, 0, contextLen, x, y, flags, p); |
| TextUtils.recycle(buf); |
| } |
| } |
| |
| /** |
| * Don't call this yourself -- exists for Paint to use internally. |
| * {@hide} |
| */ |
| public float measureText(int start, int end, Paint p) { |
| checkRange("measureText", start, end); |
| |
| float ret; |
| |
| if (end <= mGapStart) { |
| ret = p.measureText(mText, start, end - start); |
| } else if (start >= mGapStart) { |
| ret = p.measureText(mText, start + mGapLength, end - start); |
| } else { |
| char[] buf = TextUtils.obtain(end - start); |
| |
| getChars(start, end, buf, 0); |
| ret = p.measureText(buf, 0, end - start); |
| TextUtils.recycle(buf); |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * Don't call this yourself -- exists for Paint to use internally. |
| * {@hide} |
| */ |
| public int getTextWidths(int start, int end, float[] widths, Paint p) { |
| checkRange("getTextWidths", start, end); |
| |
| int ret; |
| |
| if (end <= mGapStart) { |
| ret = p.getTextWidths(mText, start, end - start, widths); |
| } else if (start >= mGapStart) { |
| ret = p.getTextWidths(mText, start + mGapLength, end - start, widths); |
| } else { |
| char[] buf = TextUtils.obtain(end - start); |
| |
| getChars(start, end, buf, 0); |
| ret = p.getTextWidths(buf, 0, end - start, widths); |
| TextUtils.recycle(buf); |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * Don't call this yourself -- exists for Paint to use internally. |
| * {@hide} |
| */ |
| public float getTextRunAdvances(int start, int end, int contextStart, int contextEnd, int flags, |
| float[] advances, int advancesPos, Paint p) { |
| |
| float ret; |
| |
| int contextLen = contextEnd - contextStart; |
| int len = end - start; |
| |
| if (end <= mGapStart) { |
| ret = p.getTextRunAdvances(mText, start, len, contextStart, contextLen, |
| flags, advances, advancesPos); |
| } else if (start >= mGapStart) { |
| ret = p.getTextRunAdvances(mText, start + mGapLength, len, |
| contextStart + mGapLength, contextLen, flags, advances, advancesPos); |
| } else { |
| char[] buf = TextUtils.obtain(contextLen); |
| getChars(contextStart, contextEnd, buf, 0); |
| ret = p.getTextRunAdvances(buf, start - contextStart, len, |
| 0, contextLen, flags, advances, advancesPos); |
| TextUtils.recycle(buf); |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * Returns the next cursor position in the run. This avoids placing the cursor between |
| * surrogates, between characters that form conjuncts, between base characters and combining |
| * marks, or within a reordering cluster. |
| * |
| * <p>The context is the shaping context for cursor movement, generally the bounds of the metric |
| * span enclosing the cursor in the direction of movement. |
| * <code>contextStart</code>, <code>contextEnd</code> and <code>offset</code> are relative to |
| * the start of the string.</p> |
| * |
| * <p>If cursorOpt is CURSOR_AT and the offset is not a valid cursor position, |
| * this returns -1. Otherwise this will never return a value before contextStart or after |
| * contextEnd.</p> |
| * |
| * @param contextStart the start index of the context |
| * @param contextEnd the (non-inclusive) end index of the context |
| * @param flags either DIRECTION_RTL or DIRECTION_LTR |
| * @param offset the cursor position to move from |
| * @param cursorOpt how to move the cursor, one of CURSOR_AFTER, |
| * CURSOR_AT_OR_AFTER, CURSOR_BEFORE, |
| * CURSOR_AT_OR_BEFORE, or CURSOR_AT |
| * @param p the Paint object that is requesting this information |
| * @return the offset of the next position, or -1 |
| * @deprecated This is an internal method, refrain from using it in your code |
| */ |
| @Deprecated |
| public int getTextRunCursor(int contextStart, int contextEnd, int flags, int offset, |
| int cursorOpt, Paint p) { |
| |
| int ret; |
| |
| int contextLen = contextEnd - contextStart; |
| if (contextEnd <= mGapStart) { |
| ret = p.getTextRunCursor(mText, contextStart, contextLen, |
| flags, offset, cursorOpt); |
| } else if (contextStart >= mGapStart) { |
| ret = p.getTextRunCursor(mText, contextStart + mGapLength, contextLen, |
| flags, offset + mGapLength, cursorOpt) - mGapLength; |
| } else { |
| char[] buf = TextUtils.obtain(contextLen); |
| getChars(contextStart, contextEnd, buf, 0); |
| ret = p.getTextRunCursor(buf, 0, contextLen, |
| flags, offset - contextStart, cursorOpt) + contextStart; |
| TextUtils.recycle(buf); |
| } |
| |
| return ret; |
| } |
| |
| // Documentation from interface |
| public void setFilters(InputFilter[] filters) { |
| if (filters == null) { |
| throw new IllegalArgumentException(); |
| } |
| |
| mFilters = filters; |
| } |
| |
| // Documentation from interface |
| public InputFilter[] getFilters() { |
| return mFilters; |
| } |
| |
| // Same as SpannableStringInternal |
| @Override |
| public boolean equals(Object o) { |
| if (o instanceof Spanned && |
| toString().equals(o.toString())) { |
| // Check span data |
| Object[] otherSpans = ((Spanned) o).getSpans(0, |
| ((Spanned) o).length(), Object.class); |
| if (mSpanCount == otherSpans.length) { |
| for (int i = 0; i < mSpanCount; ++i) { |
| Object thisSpan = mSpans[i]; |
| Object otherSpan = otherSpans[i]; |
| if (!thisSpan.equals(otherSpan) || |
| getSpanStart(thisSpan) != getSpanStart(otherSpan) || |
| getSpanEnd(thisSpan) != getSpanEnd(otherSpan) || |
| getSpanFlags(thisSpan) != getSpanFlags(otherSpan)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| } |
| return false; |
| } |
| |
| // Same as SpannableStringInternal |
| @Override |
| public int hashCode() { |
| int hash = toString().hashCode(); |
| hash = hash * 31 + mSpanCount; |
| for (int i = 0; i < mSpanCount; ++i) { |
| Object span = mSpans[i]; |
| hash = hash * 31 + span.hashCode(); |
| hash = hash * 31 + getSpanStart(span); |
| hash = hash * 31 + getSpanEnd(span); |
| hash = hash * 31 + getSpanFlags(span); |
| } |
| return hash; |
| } |
| |
| private static final InputFilter[] NO_FILTERS = new InputFilter[0]; |
| private InputFilter[] mFilters = NO_FILTERS; |
| |
| private char[] mText; |
| private int mGapStart; |
| private int mGapLength; |
| |
| private Object[] mSpans; |
| private int[] mSpanStarts; |
| private int[] mSpanEnds; |
| private int[] mSpanFlags; |
| private int mSpanCount; |
| private int mSpanCountBeforeAdd; |
| |
| // TODO These value are tightly related to the public SPAN_MARK/POINT values in {@link Spanned} |
| private static final int MARK = 1; |
| private static final int POINT = 2; |
| private static final int PARAGRAPH = 3; |
| |
| private static final int START_MASK = 0xF0; |
| private static final int END_MASK = 0x0F; |
| private static final int START_SHIFT = 4; |
| |
| // These bits are not (currently) used by SPANNED flags |
| private static final int SPAN_START_AT_START = 0x1000; |
| private static final int SPAN_START_AT_END = 0x2000; |
| private static final int SPAN_END_AT_START = 0x4000; |
| private static final int SPAN_END_AT_END = 0x8000; |
| private static final int SPAN_START_END_MASK = 0xF000; |
| } |