summaryrefslogtreecommitdiff
path: root/tools/layoutlib/bridge/src/android/graphics/Paint.java
diff options
context:
space:
mode:
Diffstat (limited to 'tools/layoutlib/bridge/src/android/graphics/Paint.java')
-rw-r--r--tools/layoutlib/bridge/src/android/graphics/Paint.java173
1 files changed, 132 insertions, 41 deletions
diff --git a/tools/layoutlib/bridge/src/android/graphics/Paint.java b/tools/layoutlib/bridge/src/android/graphics/Paint.java
index 2972ff3d9645..86de56bfd7a1 100644
--- a/tools/layoutlib/bridge/src/android/graphics/Paint.java
+++ b/tools/layoutlib/bridge/src/android/graphics/Paint.java
@@ -26,6 +26,9 @@ import java.awt.Toolkit;
import java.awt.font.FontRenderContext;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
/**
* A paint implementation overridden by the LayoutLib bridge.
@@ -44,10 +47,17 @@ public class Paint extends _Original_Paint {
private Join mJoin = Join.MITER;
private int mFlags = 0;
- private Font mFont;
+ /**
+ * Class associating a {@link Font} and it's {@link java.awt.FontMetrics}.
+ */
+ public static final class FontInfo {
+ Font mFont;
+ java.awt.FontMetrics mMetrics;
+ }
+
+ private List<FontInfo> mFonts;
private final FontRenderContext mFontContext = new FontRenderContext(
new AffineTransform(), true, true);
- private java.awt.FontMetrics mMetrics;
@SuppressWarnings("hiding")
public static final int ANTI_ALIAS_FLAG = _Original_Paint.ANTI_ALIAS_FLAG;
@@ -201,10 +211,11 @@ public class Paint extends _Original_Paint {
}
/**
- * Returns the {@link Font} object.
+ * Returns the list of {@link Font} objects. The first item is the main font, the rest
+ * are fall backs for characters not present in the main font.
*/
- public Font getFont() {
- return mFont;
+ public List<FontInfo> getFonts() {
+ return mFonts;
}
private void initFont() {
@@ -215,17 +226,29 @@ public class Paint extends _Original_Paint {
/**
* Update the {@link Font} object from the typeface, text size and scaling
*/
+ @SuppressWarnings("deprecation")
private void updateFontObject() {
if (mTypeface != null) {
- // get the typeface font object, and get our font object from it, based on the current size
- mFont = mTypeface.getFont().deriveFont(mTextSize);
- if (mScaleX != 1.0 || mSkewX != 0) {
- // TODO: support skew
- mFont = mFont.deriveFont(new AffineTransform(
- mScaleX, mSkewX, 0, 0, 1, 0));
+ // Get the fonts from the TypeFace object.
+ List<Font> fonts = mTypeface.getFonts();
+
+ // create new font objects as well as FontMetrics, based on the current text size
+ // and skew info.
+ ArrayList<FontInfo> infoList = new ArrayList<FontInfo>(fonts.size());
+ for (Font font : fonts) {
+ FontInfo info = new FontInfo();
+ info.mFont = font.deriveFont(mTextSize);
+ if (mScaleX != 1.0 || mSkewX != 0) {
+ // TODO: support skew
+ info.mFont = info.mFont.deriveFont(new AffineTransform(
+ mScaleX, mSkewX, 0, 0, 1, 0));
+ }
+ info.mMetrics = Toolkit.getDefaultToolkit().getFontMetrics(info.mFont);
+
+ infoList.add(info);
}
- mMetrics = Toolkit.getDefaultToolkit().getFontMetrics(mFont);
+ mFonts = Collections.unmodifiableList(infoList);
}
}
@@ -310,34 +333,36 @@ public class Paint extends _Original_Paint {
* @return the font's recommended interline spacing.
*/
public float getFontMetrics(FontMetrics metrics) {
- if (mMetrics != null) {
+ if (mFonts.size() > 0) {
+ java.awt.FontMetrics javaMetrics = mFonts.get(0).mMetrics;
if (metrics != null) {
- // ascent stuff should be negatif, but awt returns them as positive.
- metrics.top = - mMetrics.getMaxAscent();
- metrics.ascent = - mMetrics.getAscent();
- metrics.descent = mMetrics.getDescent();
- metrics.bottom = mMetrics.getMaxDescent();
- metrics.leading = mMetrics.getLeading();
+ // Android expects negative ascent so we invert the value from Java.
+ metrics.top = - javaMetrics.getMaxAscent();
+ metrics.ascent = - javaMetrics.getAscent();
+ metrics.descent = javaMetrics.getDescent();
+ metrics.bottom = javaMetrics.getMaxDescent();
+ metrics.leading = javaMetrics.getLeading();
}
- return mMetrics.getHeight();
+ return javaMetrics.getHeight();
}
return 0;
}
public int getFontMetricsInt(FontMetricsInt metrics) {
- if (mMetrics != null) {
+ if (mFonts.size() > 0) {
+ java.awt.FontMetrics javaMetrics = mFonts.get(0).mMetrics;
if (metrics != null) {
- // ascent stuff should be negatif, but awt returns them as positive.
- metrics.top = - mMetrics.getMaxAscent();
- metrics.ascent = - mMetrics.getAscent();
- metrics.descent = mMetrics.getDescent();
- metrics.bottom = mMetrics.getMaxDescent();
- metrics.leading = mMetrics.getLeading();
+ // Android expects negative ascent so we invert the value from Java.
+ metrics.top = - javaMetrics.getMaxAscent();
+ metrics.ascent = - javaMetrics.getAscent();
+ metrics.descent = javaMetrics.getDescent();
+ metrics.bottom = javaMetrics.getMaxDescent();
+ metrics.leading = javaMetrics.getLeading();
}
- return mMetrics.getHeight();
+ return javaMetrics.getHeight();
}
return 0;
@@ -716,9 +741,10 @@ public class Paint extends _Original_Paint {
*/
@Override
public float ascent() {
- if (mMetrics != null) {
- // ascent stuff should be negatif, but awt returns them as positive.
- return - mMetrics.getAscent();
+ if (mFonts.size() > 0) {
+ java.awt.FontMetrics javaMetrics = mFonts.get(0).mMetrics;
+ // Android expects negative ascent so we invert the value from Java.
+ return - javaMetrics.getAscent();
}
return 0;
@@ -733,8 +759,9 @@ public class Paint extends _Original_Paint {
*/
@Override
public float descent() {
- if (mMetrics != null) {
- return mMetrics.getDescent();
+ if (mFonts.size() > 0) {
+ java.awt.FontMetrics javaMetrics = mFonts.get(0).mMetrics;
+ return javaMetrics.getDescent();
}
return 0;
@@ -750,10 +777,55 @@ public class Paint extends _Original_Paint {
*/
@Override
public float measureText(char[] text, int index, int count) {
- if (mFont != null && text != null && text.length > 0) {
- Rectangle2D bounds = mFont.getStringBounds(text, index, index + count, mFontContext);
-
- return (float)bounds.getWidth();
+ // WARNING: the logic in this method is similar to Canvas.drawText.
+ // Any change to this method should be reflected in Canvas.drawText
+ if (mFonts.size() > 0) {
+ FontInfo mainFont = mFonts.get(0);
+ int i = index;
+ int lastIndex = index + count;
+ float total = 0f;
+ while (i < lastIndex) {
+ // always start with the main font.
+ int upTo = mainFont.mFont.canDisplayUpTo(text, i, lastIndex);
+ if (upTo == -1) {
+ // shortcut to exit
+ return total + mainFont.mMetrics.charsWidth(text, i, lastIndex - i);
+ } else if (upTo > 0) {
+ total += mainFont.mMetrics.charsWidth(text, i, upTo - i);
+ i = upTo;
+ // don't call continue at this point. Since it is certain the main font
+ // cannot display the font a index upTo (now ==i), we move on to the
+ // fallback fonts directly.
+ }
+
+ // no char supported, attempt to read the next char(s) with the
+ // fallback font. In this case we only test the first character
+ // and then go back to test with the main font.
+ // Special test for 2-char characters.
+ boolean foundFont = false;
+ for (int f = 1 ; f < mFonts.size() ; f++) {
+ FontInfo fontInfo = mFonts.get(f);
+
+ // need to check that the font can display the character. We test
+ // differently if the char is a high surrogate.
+ int charCount = Character.isHighSurrogate(text[i]) ? 2 : 1;
+ upTo = fontInfo.mFont.canDisplayUpTo(text, i, i + charCount);
+ if (upTo == -1) {
+ total += fontInfo.mMetrics.charsWidth(text, i, charCount);
+ i += charCount;
+ foundFont = true;
+ break;
+
+ }
+ }
+
+ // in case no font can display the char, measure it with the main font.
+ if (foundFont == false) {
+ int size = Character.isHighSurrogate(text[i]) ? 2 : 1;
+ total += mainFont.mMetrics.charsWidth(text, i, size);
+ i += size;
+ }
+ }
}
return 0;
@@ -919,14 +991,30 @@ public class Paint extends _Original_Paint {
@Override
public int getTextWidths(char[] text, int index, int count,
float[] widths) {
- if (mMetrics != null) {
+ if (mFonts.size() > 0) {
if ((index | count) < 0 || index + count > text.length
|| count > widths.length) {
throw new ArrayIndexOutOfBoundsException();
}
+ // FIXME: handle multi-char characters.
+ // Need to figure out if the lengths of the width array takes into account
+ // multi-char characters.
for (int i = 0; i < count; i++) {
- widths[i] = mMetrics.charWidth(text[i + index]);
+ char c = text[i + index];
+ boolean found = false;
+ for (FontInfo info : mFonts) {
+ if (info.mFont.canDisplay(c)) {
+ widths[i] = info.mMetrics.charWidth(c);
+ found = true;
+ break;
+ }
+ }
+
+ if (found == false) {
+ // we stop there.
+ return i;
+ }
}
return count;
@@ -1070,7 +1158,8 @@ public class Paint extends _Original_Paint {
*/
@Override
public void getTextBounds(char[] text, int index, int count, Rect bounds) {
- if (mFont != null) {
+ // FIXME
+ if (mFonts.size() > 0) {
if ((index | count) < 0 || index + count > text.length) {
throw new ArrayIndexOutOfBoundsException();
}
@@ -1078,7 +1167,9 @@ public class Paint extends _Original_Paint {
throw new NullPointerException("need bounds Rect");
}
- Rectangle2D rect = mFont.getStringBounds(text, index, index + count, mFontContext);
+ FontInfo mainInfo = mFonts.get(0);
+
+ Rectangle2D rect = mainInfo.mFont.getStringBounds(text, index, index + count, mFontContext);
bounds.set(0, 0, (int)rect.getWidth(), (int)rect.getHeight());
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-03 08:28:41 +0000