From 049d642cc4f5bfe911b2a705cd34e66c7ef780da Mon Sep 17 00:00:00 2001 From: "Tadashi G. Takaoka" Date: Thu, 2 Oct 2014 16:22:06 +0900 Subject: [PATCH] Fix ellipsizing and text scale x calculation Bug: 17742721 Bug: 11158757 Change-Id: I98b55a8e661804e84f75e75675c6f2ef33ac1a11 --- .../SuggestionStripLayoutHelper.java | 119 +++++++++--------- 1 file changed, 62 insertions(+), 57 deletions(-) diff --git a/java/src/com/android/inputmethod/latin/suggestions/SuggestionStripLayoutHelper.java b/java/src/com/android/inputmethod/latin/suggestions/SuggestionStripLayoutHelper.java index 839fce051..a651774c6 100644 --- a/java/src/com/android/inputmethod/latin/suggestions/SuggestionStripLayoutHelper.java +++ b/java/src/com/android/inputmethod/latin/suggestions/SuggestionStripLayoutHelper.java @@ -60,6 +60,9 @@ import com.android.inputmethod.latin.utils.ViewLayoutUtils; import java.util.ArrayList; +import javax.annotation.Nonnull; +import javax.annotation.Nullable; + final class SuggestionStripLayoutHelper { private static final int DEFAULT_SUGGESTIONS_COUNT_IN_STRIP = 3; private static final float DEFAULT_CENTER_SUGGESTION_PERCENTILE = 0.40f; @@ -213,15 +216,14 @@ final class SuggestionStripLayoutHelper { return word; } - final int len = word.length(); final Spannable spannedWord = new SpannableString(word); final int options = mSuggestionStripOptions; if ((isAutoCorrection && (options & AUTO_CORRECT_BOLD) != 0) || (isTypedWordValid && (options & VALID_TYPED_WORD_BOLD) != 0)) { - spannedWord.setSpan(BOLD_SPAN, 0, len, Spanned.SPAN_INCLUSIVE_EXCLUSIVE); + addStyleSpan(spannedWord, BOLD_SPAN); } if (isAutoCorrection && (options & AUTO_CORRECT_UNDERLINE) != 0) { - spannedWord.setSpan(UNDERLINE_SPAN, 0, len, Spanned.SPAN_INCLUSIVE_EXCLUSIVE); + addStyleSpan(spannedWord, UNDERLINE_SPAN); } return spannedWord; } @@ -446,10 +448,11 @@ final class SuggestionStripLayoutHelper { // {@link StyleSpan} in a content description may cause an issue of TTS/TalkBack. // Use a simple {@link String} to avoid the issue. wordView.setContentDescription(TextUtils.isEmpty(word) ? null : word.toString()); - final CharSequence text = getEllipsizedText(word, width, wordView.getPaint()); - final float scaleX = getTextScaleX(word, width, wordView.getPaint()); + final CharSequence text = getEllipsizedTextWithSettingScaleX( + word, width, wordView.getPaint()); + final float scaleX = wordView.getTextScaleX(); wordView.setText(text); // TextView.setText() resets text scale x to 1.0. - wordView.setTextScaleX(Math.max(scaleX, MIN_TEXT_XSCALE)); + wordView.setTextScaleX(scaleX); // A wordView should be disabled when word is empty in order to // make it unclickable. // With accessibility touch exploration on, wordView should be enabled even @@ -562,7 +565,8 @@ final class SuggestionStripLayoutHelper { final TextView wordView = (TextView)addToDictionaryStrip.findViewById(R.id.word_to_save); wordView.setTextColor(mColorTypedWord); final int wordWidth = (int)(width * mCenterSuggestionWeight); - final CharSequence wordToSave = getEllipsizedText(word, wordWidth, wordView.getPaint()); + final CharSequence wordToSave = getEllipsizedTextWithSettingScaleX( + word, wordWidth, wordView.getPaint()); final float wordScaleX = wordView.getTextScaleX(); wordView.setText(wordToSave); wordView.setTextScaleX(wordScaleX); @@ -596,7 +600,7 @@ final class SuggestionStripLayoutHelper { } hintView.setTextColor(mColorAutoCorrect); final float hintScaleX = getTextScaleX(hintText, hintWidth, hintView.getPaint()); - hintView.setText(hintText); + hintView.setText(hintText); // TextView.setText() resets text scale x to 1.0. hintView.setTextScaleX(hintScaleX); setLayoutWeight(hintView, hintWeight, ViewGroup.LayoutParams.MATCH_PARENT); } @@ -608,8 +612,7 @@ final class SuggestionStripLayoutHelper { final int width = titleView.getWidth() - titleView.getPaddingLeft() - titleView.getPaddingRight(); titleView.setTextColor(mColorAutoCorrect); - titleView.setText(importantNoticeTitle); - titleView.setTextScaleX(1.0f); // Reset textScaleX. + titleView.setText(importantNoticeTitle); // TextView.setText() resets text scale x to 1.0. final float titleScaleX = getTextScaleX(importantNoticeTitle, width, titleView.getPaint()); titleView.setTextScaleX(titleScaleX); } @@ -624,18 +627,19 @@ final class SuggestionStripLayoutHelper { } } - private static float getTextScaleX(final CharSequence text, final int maxWidth, + private static float getTextScaleX(@Nullable final CharSequence text, final int maxWidth, final TextPaint paint) { paint.setTextScaleX(1.0f); final int width = getTextWidth(text, paint); if (width <= maxWidth || maxWidth <= 0) { return 1.0f; } - return maxWidth / (float)width; + return maxWidth / (float) width; } - private static CharSequence getEllipsizedText(final CharSequence text, final int maxWidth, - final TextPaint paint) { + @Nullable + private static CharSequence getEllipsizedTextWithSettingScaleX( + @Nullable final CharSequence text, final int maxWidth, @Nonnull final TextPaint paint) { if (text == null) { return null; } @@ -645,62 +649,63 @@ final class SuggestionStripLayoutHelper { return text; } - // Note that TextUtils.ellipsize() use text-x-scale as 1.0 if ellipsize is needed. To - // get squeezed and ellipsized text, passes enlarged width (maxWidth / MIN_TEXT_XSCALE). - final float upscaledWidth = maxWidth / MIN_TEXT_XSCALE; - CharSequence ellipsized = TextUtils.ellipsize( - text, paint, upscaledWidth, TextUtils.TruncateAt.MIDDLE); - // For an unknown reason, ellipsized seems to return a text that does indeed fit inside the - // passed width according to paint.measureText, but not according to paint.getTextWidths. - // But when rendered, the text seems to actually take up as many pixels as returned by - // paint.getTextWidths, hence problem. - // To save this case, we compare the measured size of the new text, and if it's too much, - // try it again removing the difference. This may still give a text too long by one or - // two pixels so we take an additional 2 pixels cushion and call it a day. - // TODO: figure out why getTextWidths and measureText don't agree with each other, and - // remove the following code. - final float ellipsizedTextWidth = getTextWidth(ellipsized, paint); - if (upscaledWidth <= ellipsizedTextWidth) { - ellipsized = TextUtils.ellipsize( - text, paint, upscaledWidth - (ellipsizedTextWidth - upscaledWidth) - 2, - TextUtils.TruncateAt.MIDDLE); - } + // text must be ellipsized with minimum text scale x. paint.setTextScaleX(MIN_TEXT_XSCALE); - return ellipsized; + final boolean hasBoldStyle = hasStyleSpan(text, BOLD_SPAN); + final boolean hasUnderlineStyle = hasStyleSpan(text, UNDERLINE_SPAN); + // TextUtils.ellipsize erases any span object existed after ellipsized point. + // We have to restore these spans afterward. + final CharSequence ellipsizedText = TextUtils.ellipsize( + text, paint, maxWidth, TextUtils.TruncateAt.MIDDLE); + if (!hasBoldStyle && !hasUnderlineStyle) { + return ellipsizedText; + } + final Spannable spannableText = (ellipsizedText instanceof Spannable) + ? (Spannable)ellipsizedText : new SpannableString(ellipsizedText); + if (hasBoldStyle) { + addStyleSpan(spannableText, BOLD_SPAN); + } + if (hasUnderlineStyle) { + addStyleSpan(spannableText, UNDERLINE_SPAN); + } + return spannableText; } - private static int getTextWidth(final CharSequence text, final TextPaint paint) { + private static boolean hasStyleSpan(@Nullable final CharSequence text, + final CharacterStyle style) { + if (text instanceof Spanned) { + return ((Spanned)text).getSpanStart(style) >= 0; + } + return false; + } + + private static void addStyleSpan(@Nonnull final Spannable text, final CharacterStyle style) { + text.removeSpan(style); + text.setSpan(style, 0, text.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE); + } + + private static int getTextWidth(@Nullable final CharSequence text, final TextPaint paint) { if (TextUtils.isEmpty(text)) { return 0; } + final int length = text.length(); + final float[] widths = new float[length]; + final int count; final Typeface savedTypeface = paint.getTypeface(); - paint.setTypeface(getTextTypeface(text)); - final int len = text.length(); - final float[] widths = new float[len]; - final int count = paint.getTextWidths(text, 0, len, widths); + try { + paint.setTypeface(getTextTypeface(text)); + count = paint.getTextWidths(text, 0, length, widths); + } finally { + paint.setTypeface(savedTypeface); + } int width = 0; for (int i = 0; i < count; i++) { width += Math.round(widths[i] + 0.5f); } - paint.setTypeface(savedTypeface); return width; } - private static Typeface getTextTypeface(final CharSequence text) { - if (!(text instanceof SpannableString)) { - return Typeface.DEFAULT; - } - - final SpannableString ss = (SpannableString)text; - final StyleSpan[] styles = ss.getSpans(0, text.length(), StyleSpan.class); - if (styles.length == 0) { - return Typeface.DEFAULT; - } - - if (styles[0].getStyle() == Typeface.BOLD) { - return Typeface.DEFAULT_BOLD; - } - // TODO: BOLD_ITALIC, ITALIC case? - return Typeface.DEFAULT; + private static Typeface getTextTypeface(@Nullable final CharSequence text) { + return hasStyleSpan(text, BOLD_SPAN) ? Typeface.DEFAULT_BOLD : Typeface.DEFAULT; } }