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-rw-r--r--core/java/android/text/Styled.java249
1 files changed, 86 insertions, 163 deletions
diff --git a/core/java/android/text/Styled.java b/core/java/android/text/Styled.java
index 0aa2004..05c27ea 100644
--- a/core/java/android/text/Styled.java
+++ b/core/java/android/text/Styled.java
@@ -16,26 +16,25 @@
package android.text;
-import android.graphics.Canvas;
import android.graphics.Paint;
-import android.text.style.CharacterStyle;
-import android.text.style.MetricAffectingSpan;
-import android.text.style.ReplacementSpan;
-
-/**
- * This class provides static methods for drawing and measuring styled texts, like
- * {@link android.text.Spanned} object with {@link android.text.style.ReplacementSpan}.
- * @hide
- */
-public class Styled
+import android.graphics.Canvas;
+import android.graphics.Path;
+import android.graphics.RectF;
+import android.graphics.Typeface;
+import android.graphics.MaskFilter;
+import android.graphics.Rasterizer;
+import android.graphics.LayerRasterizer;
+import android.text.style.*;
+
+/* package */ class Styled
{
private static float each(Canvas canvas,
Spanned text, int start, int end,
int dir, boolean reverse,
float x, int top, int y, int bottom,
- Paint.FontMetricsInt fmi,
+ Paint.FontMetricsInt fm,
+ TextPaint realPaint,
TextPaint paint,
- TextPaint workPaint,
boolean needwid) {
boolean havewid = false;
@@ -44,9 +43,9 @@ public class Styled
ReplacementSpan replacement = null;
- paint.bgColor = 0;
- paint.baselineShift = 0;
- workPaint.set(paint);
+ realPaint.bgColor = 0;
+ realPaint.baselineShift = 0;
+ paint.set(realPaint);
if (spans.length > 0) {
for (int i = 0; i < spans.length; i++) {
@@ -56,7 +55,7 @@ public class Styled
replacement = (ReplacementSpan)span;
}
else {
- span.updateDrawState(workPaint);
+ span.updateDrawState(paint);
}
}
}
@@ -75,66 +74,66 @@ public class Styled
tmpend = end;
}
- if (fmi != null) {
- workPaint.getFontMetricsInt(fmi);
+ if (fm != null) {
+ paint.getFontMetricsInt(fm);
}
if (canvas != null) {
- if (workPaint.bgColor != 0) {
- int c = workPaint.getColor();
- Paint.Style s = workPaint.getStyle();
- workPaint.setColor(workPaint.bgColor);
- workPaint.setStyle(Paint.Style.FILL);
+ if (paint.bgColor != 0) {
+ int c = paint.getColor();
+ Paint.Style s = paint.getStyle();
+ paint.setColor(paint.bgColor);
+ paint.setStyle(Paint.Style.FILL);
if (!havewid) {
- ret = workPaint.measureText(tmp, tmpstart, tmpend);
+ ret = paint.measureText(tmp, tmpstart, tmpend);
havewid = true;
}
if (dir == Layout.DIR_RIGHT_TO_LEFT)
- canvas.drawRect(x - ret, top, x, bottom, workPaint);
+ canvas.drawRect(x - ret, top, x, bottom, paint);
else
- canvas.drawRect(x, top, x + ret, bottom, workPaint);
+ canvas.drawRect(x, top, x + ret, bottom, paint);
- workPaint.setStyle(s);
- workPaint.setColor(c);
+ paint.setStyle(s);
+ paint.setColor(c);
}
if (dir == Layout.DIR_RIGHT_TO_LEFT) {
if (!havewid) {
- ret = workPaint.measureText(tmp, tmpstart, tmpend);
+ ret = paint.measureText(tmp, tmpstart, tmpend);
havewid = true;
}
canvas.drawText(tmp, tmpstart, tmpend,
- x - ret, y + workPaint.baselineShift, workPaint);
+ x - ret, y + paint.baselineShift, paint);
} else {
if (needwid) {
if (!havewid) {
- ret = workPaint.measureText(tmp, tmpstart, tmpend);
+ ret = paint.measureText(tmp, tmpstart, tmpend);
havewid = true;
}
}
canvas.drawText(tmp, tmpstart, tmpend,
- x, y + workPaint.baselineShift, workPaint);
+ x, y + paint.baselineShift, paint);
}
} else {
if (needwid && !havewid) {
- ret = workPaint.measureText(tmp, tmpstart, tmpend);
+ ret = paint.measureText(tmp, tmpstart, tmpend);
havewid = true;
}
}
} else {
- ret = replacement.getSize(workPaint, text, start, end, fmi);
+ ret = replacement.getSize(paint, text, start, end, fm);
if (canvas != null) {
if (dir == Layout.DIR_RIGHT_TO_LEFT)
replacement.draw(canvas, text, start, end,
- x - ret, top, y, bottom, workPaint);
+ x - ret, top, y, bottom, paint);
else
replacement.draw(canvas, text, start, end,
- x, top, y, bottom, workPaint);
+ x, top, y, bottom, paint);
}
}
@@ -144,29 +143,15 @@ public class Styled
return ret;
}
- /**
- * Return the advance widths for the characters in the string.
- * See also {@link android.graphics.Paint#getTextWidths(CharSequence, int, int, float[])}.
- *
- * @param paint The main {@link TextPaint} object.
- * @param workPaint The {@link TextPaint} object used for temporal workspace.
- * @param text The text to measure
- * @param start The index of the first char to to measure
- * @param end The end of the text slice to measure
- * @param widths Array to receive the advance widths of the characters.
- * Must be at least a large as (end - start).
- * @param fmi FontMetrics information. Can be null.
- * @return The actual number of widths returned.
- */
- public static int getTextWidths(TextPaint paint,
- TextPaint workPaint,
- Spanned text, int start, int end,
- float[] widths, Paint.FontMetricsInt fmi) {
- // Keep workPaint as is so that developers reuse the workspace.
+ public static int getTextWidths(TextPaint realPaint,
+ TextPaint paint,
+ Spanned text, int start, int end,
+ float[] widths, Paint.FontMetricsInt fm) {
+
MetricAffectingSpan[] spans = text.getSpans(start, end, MetricAffectingSpan.class);
ReplacementSpan replacement = null;
- workPaint.set(paint);
+ paint.set(realPaint);
for (int i = 0; i < spans.length; i++) {
MetricAffectingSpan span = spans[i];
@@ -174,15 +159,15 @@ public class Styled
replacement = (ReplacementSpan)span;
}
else {
- span.updateMeasureState(workPaint);
+ span.updateMeasureState(paint);
}
}
if (replacement == null) {
- workPaint.getFontMetricsInt(fmi);
- workPaint.getTextWidths(text, start, end, widths);
+ paint.getFontMetricsInt(fm);
+ paint.getTextWidths(text, start, end, widths);
} else {
- int wid = replacement.getSize(workPaint, text, start, end, fmi);
+ int wid = replacement.getSize(paint, text, start, end, fm);
if (end > start) {
widths[0] = wid;
@@ -198,10 +183,10 @@ public class Styled
CharSequence text, int start, int end,
int dir, boolean reverse,
float x, int top, int y, int bottom,
- Paint.FontMetricsInt fmi,
+ Paint.FontMetricsInt fm,
TextPaint paint,
TextPaint workPaint,
- boolean needWidth) {
+ boolean needwid) {
if (! (text instanceof Spanned)) {
float ret = 0;
@@ -209,22 +194,22 @@ public class Styled
CharSequence tmp = TextUtils.getReverse(text, start, end);
int tmpend = end - start;
- if (canvas != null || needWidth)
+ if (canvas != null || needwid)
ret = paint.measureText(tmp, 0, tmpend);
if (canvas != null)
canvas.drawText(tmp, 0, tmpend,
x - ret, y, paint);
} else {
- if (needWidth)
+ if (needwid)
ret = paint.measureText(text, start, end);
if (canvas != null)
canvas.drawText(text, start, end, x, y, paint);
}
- if (fmi != null) {
- paint.getFontMetricsInt(fmi);
+ if (fm != null) {
+ paint.getFontMetricsInt(fm);
}
return ret * dir; //Layout.DIR_RIGHT_TO_LEFT == -1
@@ -247,129 +232,67 @@ public class Styled
next = sp.nextSpanTransition(i, end, division);
x += each(canvas, sp, i, next, dir, reverse,
- x, top, y, bottom, fmi, paint, workPaint,
- needWidth || next != end);
-
- if (fmi != null) {
- if (fmi.ascent < asc)
- asc = fmi.ascent;
- if (fmi.descent > desc)
- desc = fmi.descent;
-
- if (fmi.top < ftop)
- ftop = fmi.top;
- if (fmi.bottom > fbot)
- fbot = fmi.bottom;
+ x, top, y, bottom, fm, paint, workPaint,
+ needwid || next != end);
+
+ if (fm != null) {
+ if (fm.ascent < asc)
+ asc = fm.ascent;
+ if (fm.descent > desc)
+ desc = fm.descent;
+
+ if (fm.top < ftop)
+ ftop = fm.top;
+ if (fm.bottom > fbot)
+ fbot = fm.bottom;
}
}
- if (fmi != null) {
+ if (fm != null) {
if (start == end) {
- paint.getFontMetricsInt(fmi);
+ paint.getFontMetricsInt(fm);
} else {
- fmi.ascent = asc;
- fmi.descent = desc;
- fmi.top = ftop;
- fmi.bottom = fbot;
+ fm.ascent = asc;
+ fm.descent = desc;
+ fm.top = ftop;
+ fm.bottom = fbot;
}
}
return x - ox;
}
-
- /* package */ static float drawText(Canvas canvas,
- CharSequence text, int start, int end,
- int direction, boolean reverse,
- float x, int top, int y, int bottom,
- TextPaint paint,
- TextPaint workPaint,
- boolean needWidth) {
- if ((direction == Layout.DIR_RIGHT_TO_LEFT && !reverse) ||
- (reverse && direction == Layout.DIR_LEFT_TO_RIGHT)) {
+ public static float drawText(Canvas canvas,
+ CharSequence text, int start, int end,
+ int dir, boolean reverse,
+ float x, int top, int y, int bottom,
+ TextPaint paint,
+ TextPaint workPaint,
+ boolean needwid) {
+ if ((dir == Layout.DIR_RIGHT_TO_LEFT && !reverse)||(reverse && dir == Layout.DIR_LEFT_TO_RIGHT)) {
float ch = foreach(null, text, start, end, Layout.DIR_LEFT_TO_RIGHT,
false, 0, 0, 0, 0, null, paint, workPaint,
true);
- ch *= direction; // DIR_RIGHT_TO_LEFT == -1
- foreach(canvas, text, start, end, -direction,
+ ch *= dir; // DIR_RIGHT_TO_LEFT == -1
+ foreach(canvas, text, start, end, -dir,
reverse, x + ch, top, y, bottom, null, paint,
workPaint, true);
return ch;
}
- return foreach(canvas, text, start, end, direction, reverse,
+ return foreach(canvas, text, start, end, dir, reverse,
x, top, y, bottom, null, paint, workPaint,
- needWidth);
- }
-
- /**
- * Draw the specified range of text, specified by start/end, with its origin at (x,y),
- * in the specified Paint. The origin is interpreted based on the Align setting in the
- * Paint.
- *
- * This method considers style information in the text
- * (e.g. Even when text is an instance of {@link android.text.Spanned}, this method
- * correctly draws the text).
- * See also
- * {@link android.graphics.Canvas#drawText(CharSequence, int, int, float, float, Paint)}
- * and
- * {@link android.graphics.Canvas#drawRect(float, float, float, float, Paint)}.
- *
- * @param canvas The target canvas.
- * @param text The text to be drawn
- * @param start The index of the first character in text to draw
- * @param end (end - 1) is the index of the last character in text to draw
- * @param direction The direction of the text. This must be
- * {@link android.text.Layout#DIR_LEFT_TO_RIGHT} or
- * {@link android.text.Layout#DIR_RIGHT_TO_LEFT}.
- * @param x The x-coordinate of origin for where to draw the text
- * @param top The top side of the rectangle to be drawn
- * @param y The y-coordinate of origin for where to draw the text
- * @param bottom The bottom side of the rectangle to be drawn
- * @param paint The main {@link TextPaint} object.
- * @param workPaint The {@link TextPaint} object used for temporal workspace.
- * @param needWidth If true, this method returns the width of drawn text.
- * @return Width of the drawn text if needWidth is true.
- */
- public static float drawText(Canvas canvas,
- CharSequence text, int start, int end,
- int direction,
- float x, int top, int y, int bottom,
- TextPaint paint,
- TextPaint workPaint,
- boolean needWidth) {
- // For safety.
- direction = direction >= 0 ? Layout.DIR_LEFT_TO_RIGHT : Layout.DIR_RIGHT_TO_LEFT;
- /*
- * Hided "reverse" parameter since it is meaningless for external developers.
- * Kept workPaint as is so that developers reuse the workspace.
- */
- return drawText(canvas, text, start, end, direction, false,
- x, top, y, bottom, paint, workPaint, needWidth);
+ needwid);
}
-
- /**
- * Return the width of the text, considering style information in the text
- * (e.g. Even when text is an instance of {@link android.text.Spanned}, this method
- * correctly mesures the width of the text).
- *
- * @param paint The main {@link TextPaint} object.
- * @param workPaint The {@link TextPaint} object used for temporal workspace.
- * @param text The text to measure
- * @param start The index of the first character to start measuring
- * @param end 1 beyond the index of the last character to measure
- * @param fmi FontMetrics information. Can be null
- * @return The width of the text
- */
+
public static float measureText(TextPaint paint,
TextPaint workPaint,
CharSequence text, int start, int end,
- Paint.FontMetricsInt fmi) {
- // Keep workPaint as is so that developers reuse the workspace.
+ Paint.FontMetricsInt fm) {
return foreach(null, text, start, end,
Layout.DIR_LEFT_TO_RIGHT, false,
- 0, 0, 0, 0, fmi, paint, workPaint, true);
+ 0, 0, 0, 0, fm, paint, workPaint, true);
}
}
generated by cgit v1.1 at 2024-09-15 15:58:33 +0000