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Fix for scribbles on Android 8

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Fixes #6998
// FREEBIE
This commit is contained in:
Moxie Marlinspike 2017-11-03 11:32:18 -07:00
parent 3e9bfcb3fd
commit bcdf3bf311
1 changed files with 17 additions and 145 deletions
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162
src/org/thoughtcrime/securesms/scribbles/widget/CanvasView.java
View File

@ -22,6 +22,7 @@ import android.graphics.PorterDuffXfermode;
import android.graphics.RectF;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
@ -34,6 +35,8 @@ import java.util.List;
*/
public class CanvasView extends View {
private static final String TAG = CanvasView.class.getSimpleName();
// Enumeration for Mode
public enum Mode {
DRAW,
@ -52,9 +55,9 @@ public class CanvasView extends View {
QUBIC_BEZIER;
}
private Context context = null;
private Canvas canvas = null;
private Bitmap bitmap = null;
private int canvasWidth = 1;
private int canvasHeight = 1;
private Bitmap bitmap = null;
private List<Path> pathLists = new ArrayList<Path>();
private List<Paint> paintLists = new ArrayList<Paint>();
@ -80,15 +83,6 @@ public class CanvasView extends View {
private float blur = 0F;
private Paint.Cap lineCap = Paint.Cap.ROUND;
// for Text
private String text = "";
private Typeface fontFamily = Typeface.DEFAULT;
private float fontSize = 32F;
private Paint.Align textAlign = Paint.Align.RIGHT; // fixed
private Paint textPaint = new Paint();
private float textX = 0F;
private float textY = 0F;
// for Drawer
private float startX = 0F;
private float startY = 0F;
@ -106,7 +100,7 @@ public class CanvasView extends View {
*/
public CanvasView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
this.setup(context);
this.setup();
}
/**
@ -117,7 +111,7 @@ public class CanvasView extends View {
*/
public CanvasView(Context context, AttributeSet attrs) {
super(context, attrs);
this.setup(context);
this.setup();
}
/**
@ -127,22 +121,13 @@ public class CanvasView extends View {
*/
public CanvasView(Context context) {
super(context);
this.setup(context);
}
/**
* Common initialization.
*
* @param context
*/
private void setup(Context context) {
this.context = context;
private void setup() {
this.pathLists.add(new Path());
this.paintLists.add(this.createPaint());
this.historyPointer++;
this.textPaint.setARGB(0, 255, 255, 255);
}
/**
@ -160,14 +145,6 @@ public class CanvasView extends View {
paint.setStrokeCap(this.lineCap);
paint.setStrokeJoin(Paint.Join.MITER); // fixed
// for Text
if (this.mode == Mode.TEXT) {
paint.setTypeface(this.fontFamily);
paint.setTextSize(this.fontSize);
paint.setTextAlign(this.textAlign);
paint.setStrokeWidth(0F);
}
if (this.mode == Mode.ERASER) {
// Eraser
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
@ -238,51 +215,6 @@ public class CanvasView extends View {
return this.pathLists.get(this.historyPointer - 1);
}
/**
* This method draws text.
*
* @param canvas the instance of Canvas
*/
private void drawText(Canvas canvas) {
if (this.text.length() <= 0) {
return;
}
if (this.mode == Mode.TEXT) {
this.textX = this.startX;
this.textY = this.startY;
this.textPaint = this.createPaint();
}
float textX = this.textX;
float textY = this.textY;
Paint paintForMeasureText = new Paint();
// Line break automatically
float textLength = paintForMeasureText.measureText(this.text);
float lengthOfChar = textLength / (float)this.text.length();
float restWidth = this.canvas.getWidth() - textX; // text-align : right
int numChars = (lengthOfChar <= 0) ? 1 : (int) Math.floor((double)(restWidth / lengthOfChar)); // The number of characters at 1 line
int modNumChars = (numChars < 1) ? 1 : numChars;
float y = textY;
for (int i = 0, len = this.text.length(); i < len; i += modNumChars) {
String substring = "";
if ((i + modNumChars) < len) {
substring = this.text.substring(i, (i + modNumChars));
} else {
substring = this.text.substring(i, len);
}
y += this.fontSize;
canvas.drawText(substring, textX, y, this.textPaint);
}
}
/**
* This method defines processes on MotionEvent.ACTION_DOWN
*
@ -433,17 +365,18 @@ public class CanvasView extends View {
canvas.drawPath(path, paint);
}
}
this.drawText(canvas);
this.canvas = canvas;
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
this.canvasWidth = w;
this.canvasHeight = h;
}
public void render(Canvas canvas) {
if (this.canvas == null) return;
float scaleX = 1.0F * canvas.getWidth() / this.canvas.getWidth();
float scaleY = 1.0F * canvas.getHeight() / this.canvas.getHeight();
float scaleX = 1.0F * canvas.getWidth() / canvasWidth;
float scaleY = 1.0F * canvas.getHeight() / canvasHeight;
Matrix matrix = new Matrix();
matrix.setScale(scaleX, scaleY);
@ -591,8 +524,6 @@ public class CanvasView extends View {
}
}
this.text = "";
// Clear
this.invalidate();
}
@ -615,24 +546,6 @@ public class CanvasView extends View {
this.baseColor = color;
}
/**
* This method is getter for drawn text.
*
* @return
*/
public String getText() {
return this.text;
}
/**
* This method is setter for drawn text.
*
* @param text
*/
public void setText(String text) {
this.text = text;
}
/**
* This method is getter for stroke or fill.
*
@ -775,47 +688,6 @@ public class CanvasView extends View {
this.lineCap = cap;
}
/**
* This method is getter for font size,
*
* @return
*/
public float getFontSize() {
return this.fontSize;
}
/**
* This method is setter for font size.
* The 1st argument is greater than or equal to 0.0.
*
* @param size
*/
public void setFontSize(float size) {
if (size >= 0F) {
this.fontSize = size;
} else {
this.fontSize = 32F;
}
}
/**
* This method is getter for font-family.
*
* @return
*/
public Typeface getFontFamily() {
return this.fontFamily;
}
/**
* This method is setter for font-family.
*
* @param face
*/
public void setFontFamily(Typeface face) {
this.fontFamily = face;
}
/**
* This method gets current canvas as bitmap.
*