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remove unused code
This commit is contained in:
Helium314
parent
38fd364178
commit
8eb8a2368a
3 changed files with 0 additions and 472 deletions
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/*
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* Copyright (C) 2013 The Android Open Source Project
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* modified
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* SPDX-License-Identifier: Apache-2.0 AND GPL-3.0-only
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*/
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package helium314.keyboard.keyboard.internal;
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import helium314.keyboard.latin.utils.Log;
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import java.util.Arrays;
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import java.util.Locale;
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/**
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* Utilities for matrix operations. Don't instantiate objects inside this class to prevent
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* unexpected performance regressions.
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*/
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public class MatrixUtils {
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static final String TAG = MatrixUtils.class.getSimpleName();
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public static class MatrixOperationFailedException extends Exception {
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private static final long serialVersionUID = 4384485606788583829L;
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public MatrixOperationFailedException(String msg) {
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super(msg);
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Log.d(TAG, msg);
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}
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}
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/**
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* A utility function to inverse matrix.
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* Find a pivot and swap the row of squareMatrix0 and squareMatrix1
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*/
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private static void findPivotAndSwapRow(final int row, final float[][] squareMatrix0,
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final float[][] squareMatrix1, final int size) {
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int ip = row;
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float pivot = Math.abs(squareMatrix0[row][row]);
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for (int i = row + 1; i < size; ++i) {
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if (pivot < Math.abs(squareMatrix0[i][row])) {
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ip = i;
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pivot = Math.abs(squareMatrix0[i][row]);
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}
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}
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if (ip != row) {
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for (int j = 0; j < size; ++j) {
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final float temp0 = squareMatrix0[ip][j];
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squareMatrix0[ip][j] = squareMatrix0[row][j];
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squareMatrix0[row][j] = temp0;
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final float temp1 = squareMatrix1[ip][j];
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squareMatrix1[ip][j] = squareMatrix1[row][j];
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squareMatrix1[row][j] = temp1;
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}
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}
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}
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/**
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* A utility function to inverse matrix. This function calculates answer for each row by
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* sweeping method of Gauss Jordan elimination
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*/
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private static void sweep(final int row, final float[][] squareMatrix0,
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final float[][] squareMatrix1, final int size) throws MatrixOperationFailedException {
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final float pivot = squareMatrix0[row][row];
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if (pivot == 0) {
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throw new MatrixOperationFailedException("Inverse failed. Invalid pivot");
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}
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for (int j = 0; j < size; ++j) {
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squareMatrix0[row][j] /= pivot;
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squareMatrix1[row][j] /= pivot;
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}
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for (int i = 0; i < size; i++) {
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final float sweepTargetValue = squareMatrix0[i][row];
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if (i != row) {
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for (int j = row; j < size; ++j) {
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squareMatrix0[i][j] -= sweepTargetValue * squareMatrix0[row][j];
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}
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for (int j = 0; j < size; ++j) {
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squareMatrix1[i][j] -= sweepTargetValue * squareMatrix1[row][j];
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}
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}
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}
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}
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/**
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* A function to inverse matrix.
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* The inverse matrix of squareMatrix will be output to inverseMatrix. Please notice that
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* the value of squareMatrix is modified in this function and can't be resuable.
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*/
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public static void inverse(final float[][] squareMatrix,
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final float[][] inverseMatrix) throws MatrixOperationFailedException {
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final int size = squareMatrix.length;
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if (squareMatrix[0].length != size || inverseMatrix.length != size
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|| inverseMatrix[0].length != size) {
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throw new MatrixOperationFailedException(
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"--- invalid length. column should be 2 times larger than row.");
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}
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for (int i = 0; i < size; ++i) {
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Arrays.fill(inverseMatrix[i], 0.0f);
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inverseMatrix[i][i] = 1.0f;
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}
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for (int i = 0; i < size; ++i) {
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findPivotAndSwapRow(i, squareMatrix, inverseMatrix, size);
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sweep(i, squareMatrix, inverseMatrix, size);
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}
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}
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/**
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* A matrix operation to multiply m0 and m1.
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*/
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public static void multiply(final float[][] m0, final float[][] m1,
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final float[][] retval) throws MatrixOperationFailedException {
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if (m0[0].length != m1.length) {
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throw new MatrixOperationFailedException(
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"--- invalid length for multiply " + m0[0].length + ", " + m1.length);
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}
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final int m0h = m0.length;
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final int m0w = m0[0].length;
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final int m1w = m1[0].length;
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if (retval.length != m0h || retval[0].length != m1w) {
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throw new MatrixOperationFailedException(
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"--- invalid length of retval " + retval.length + ", " + retval[0].length);
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}
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for (int i = 0; i < m0h; i++) {
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Arrays.fill(retval[i], 0);
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for (int j = 0; j < m1w; j++) {
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for (int k = 0; k < m0w; k++) {
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retval[i][j] += m0[i][k] * m1[k][j];
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}
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}
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}
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}
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/**
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* A utility function to dump the specified matrix in a readable way
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*/
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public static void dump(final String title, final float[][] a) {
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final int column = a[0].length;
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final int row = a.length;
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Log.d(TAG, "Dump matrix: " + title);
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Log.d(TAG, "/*---------------------");
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final StringBuilder sb = new StringBuilder();
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for (float[] floats : a) {
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sb.setLength(0);
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for (int j = 0; j < column; ++j) {
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sb.append(String.format(Locale.ROOT, "%4f", floats[j])).append(' ');
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}
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Log.d(TAG, sb.toString());
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}
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Log.d(TAG, "---------------------*/");
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}
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}
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@ -1,89 +0,0 @@
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/*
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* Copyright (C) 2013 The Android Open Source Project
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* modified
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* SPDX-License-Identifier: Apache-2.0 AND GPL-3.0-only
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*/
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package helium314.keyboard.keyboard.internal;
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import helium314.keyboard.keyboard.internal.MatrixUtils.MatrixOperationFailedException;
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import helium314.keyboard.latin.utils.Log;
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import java.util.Arrays;
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/**
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* Utilities to smooth coordinates. Currently, we calculate 3d least squares formula by using
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* Lagrangian smoothing
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*/
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// todo: unused, what could this be used for? maybe just remove (then also remove MatrixUtils)
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public class SmoothingUtils {
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private static final String TAG = SmoothingUtils.class.getSimpleName();
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private static final boolean DEBUG = false;
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private SmoothingUtils() {
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// not allowed to instantiate publicly
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}
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/**
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* Find a most likely 3d least squares formula for specified coordinates.
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* "retval" should be a 1x4 size matrix.
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*/
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public static void get3DParameters(final float[] xs, final float[] ys,
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final float[][] retval) throws MatrixOperationFailedException {
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final int COEFF_COUNT = 4; // Coefficient count for 3d smoothing
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if (retval.length != COEFF_COUNT || retval[0].length != 1) {
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Log.d(TAG, "--- invalid length of 3d retval " + retval.length + ", "
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+ retval[0].length);
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return;
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}
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final int N = xs.length;
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// TODO: Never isntantiate the matrix
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final float[][] m0 = new float[COEFF_COUNT][COEFF_COUNT];
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final float[][] m0Inv = new float[COEFF_COUNT][COEFF_COUNT];
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final float[][] m1 = new float[COEFF_COUNT][N];
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final float[][] m2 = new float[N][1];
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// m0
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for (int i = 0; i < COEFF_COUNT; ++i) {
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Arrays.fill(m0[i], 0);
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for (int j = 0; j < COEFF_COUNT; ++j) {
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final int pow = i + j;
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for (float x : xs) {
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m0[i][j] += (float) Math.pow(x, pow);
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}
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}
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}
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// m0Inv
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MatrixUtils.inverse(m0, m0Inv);
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if (DEBUG) {
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MatrixUtils.dump("m0-1", m0Inv);
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}
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// m1
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for (int i = 0; i < COEFF_COUNT; ++i) {
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for (int j = 0; j < N; ++j) {
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m1[i][j] = (i == 0) ? 1.0f : m1[i - 1][j] * xs[j];
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}
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}
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// m2
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for (int i = 0; i < N; ++i) {
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m2[i][0] = ys[i];
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}
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final float[][] m0Invxm1 = new float[COEFF_COUNT][N];
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if (DEBUG) {
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MatrixUtils.dump("a0", m0Inv);
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MatrixUtils.dump("a1", m1);
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}
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MatrixUtils.multiply(m0Inv, m1, m0Invxm1);
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if (DEBUG) {
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MatrixUtils.dump("a2", m0Invxm1);
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MatrixUtils.dump("a3", m2);
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}
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MatrixUtils.multiply(m0Invxm1, m2, retval);
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if (DEBUG) {
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MatrixUtils.dump("result", retval);
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}
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}
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}
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/*
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* Copyright (C) 2014 The Android Open Source Project
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* modified
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* SPDX-License-Identifier: Apache-2.0 AND GPL-3.0-only
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*/
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package helium314.keyboard.latin.utils;
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import android.graphics.Matrix;
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import android.graphics.Rect;
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import android.inputmethodservice.ExtractEditText;
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import android.inputmethodservice.InputMethodService;
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import android.text.Layout;
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import android.text.Spannable;
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import android.text.Spanned;
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import android.view.View;
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import android.view.ViewParent;
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import android.view.inputmethod.CursorAnchorInfo;
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import android.widget.TextView;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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// todo: remove this? or is there anything it could be useful for?
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/**
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* This class allows input methods to extract {@link CursorAnchorInfo} directly from the given
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* {@link TextView}. This is useful and even necessary to support full-screen mode where the default
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* {@link InputMethodService#onUpdateCursorAnchorInfo(CursorAnchorInfo)} event callback must be
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* ignored because it reports the character locations of the target application rather than
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* characters on {@link ExtractEditText}.
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*/
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public final class CursorAnchorInfoUtils {
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private CursorAnchorInfoUtils() {
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// This helper class is not instantiable.
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}
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private static boolean isPositionVisible(final View view, final float positionX,
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final float positionY) {
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final float[] position = new float[] { positionX, positionY };
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View currentView = view;
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while (currentView != null) {
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if (currentView != view) {
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// Local scroll is already taken into account in positionX/Y
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position[0] -= currentView.getScrollX();
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position[1] -= currentView.getScrollY();
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}
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if (position[0] < 0 || position[1] < 0 ||
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position[0] > currentView.getWidth() || position[1] > currentView.getHeight()) {
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return false;
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}
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if (!currentView.getMatrix().isIdentity()) {
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currentView.getMatrix().mapPoints(position);
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}
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position[0] += currentView.getLeft();
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position[1] += currentView.getTop();
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final ViewParent parent = currentView.getParent();
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if (parent instanceof View) {
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currentView = (View) parent;
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} else {
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// We've reached the ViewRoot, stop iterating
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currentView = null;
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}
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}
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// We've been able to walk up the view hierarchy and the position was never clipped
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return true;
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}
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/**
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* Returns {@link CursorAnchorInfo} from the given {@link TextView}.
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* @param textView the target text view from which {@link CursorAnchorInfo} is to be extracted.
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* @return the {@link CursorAnchorInfo} object based on the current layout. {@code null} if it
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* is not feasible.
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*/
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@Nullable
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private static CursorAnchorInfo extractFromTextViewInternal(@NonNull final TextView textView) {
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final Layout layout = textView.getLayout();
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if (layout == null) {
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return null;
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}
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final CursorAnchorInfo.Builder builder = new CursorAnchorInfo.Builder();
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final int selectionStart = textView.getSelectionStart();
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builder.setSelectionRange(selectionStart, textView.getSelectionEnd());
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// Construct transformation matrix from view local coordinates to screen coordinates.
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final Matrix viewToScreenMatrix = new Matrix(textView.getMatrix());
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final int[] viewOriginInScreen = new int[2];
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textView.getLocationOnScreen(viewOriginInScreen);
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viewToScreenMatrix.postTranslate(viewOriginInScreen[0], viewOriginInScreen[1]);
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builder.setMatrix(viewToScreenMatrix);
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if (layout.getLineCount() == 0) {
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return null;
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}
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final Rect lineBoundsWithoutOffset = new Rect();
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final Rect lineBoundsWithOffset = new Rect();
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layout.getLineBounds(0, lineBoundsWithoutOffset);
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textView.getLineBounds(0, lineBoundsWithOffset);
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final float viewportToContentHorizontalOffset = lineBoundsWithOffset.left
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- lineBoundsWithoutOffset.left - textView.getScrollX();
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final float viewportToContentVerticalOffset = lineBoundsWithOffset.top
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- lineBoundsWithoutOffset.top - textView.getScrollY();
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final CharSequence text = textView.getText();
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if (text instanceof Spannable) {
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// Here we assume that the composing text is marked as SPAN_COMPOSING flag. This is not
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// necessarily true, but basically works.
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int composingTextStart = text.length();
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int composingTextEnd = 0;
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final Spannable spannable = (Spannable) text;
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final Object[] spans = spannable.getSpans(0, text.length(), Object.class);
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for (Object span : spans) {
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final int spanFlag = spannable.getSpanFlags(span);
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if ((spanFlag & Spanned.SPAN_COMPOSING) != 0) {
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composingTextStart = Math.min(composingTextStart,
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spannable.getSpanStart(span));
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composingTextEnd = Math.max(composingTextEnd, spannable.getSpanEnd(span));
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}
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}
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final boolean hasComposingText =
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(0 <= composingTextStart) && (composingTextStart < composingTextEnd);
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if (hasComposingText) {
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final CharSequence composingText = text.subSequence(composingTextStart,
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composingTextEnd);
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builder.setComposingText(composingTextStart, composingText);
|
|
||||||
|
|
||||||
final int minLine = layout.getLineForOffset(composingTextStart);
|
|
||||||
final int maxLine = layout.getLineForOffset(composingTextEnd - 1);
|
|
||||||
for (int line = minLine; line <= maxLine; ++line) {
|
|
||||||
final int lineStart = layout.getLineStart(line);
|
|
||||||
final int lineEnd = layout.getLineEnd(line);
|
|
||||||
final int offsetStart = Math.max(lineStart, composingTextStart);
|
|
||||||
final int offsetEnd = Math.min(lineEnd, composingTextEnd);
|
|
||||||
final boolean ltrLine =
|
|
||||||
layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT;
|
|
||||||
final float[] widths = new float[offsetEnd - offsetStart];
|
|
||||||
layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths);
|
|
||||||
final float top = layout.getLineTop(line);
|
|
||||||
final float bottom = layout.getLineBottom(line);
|
|
||||||
for (int offset = offsetStart; offset < offsetEnd; ++offset) {
|
|
||||||
final float charWidth = widths[offset - offsetStart];
|
|
||||||
final boolean isRtl = layout.isRtlCharAt(offset);
|
|
||||||
final float primary = layout.getPrimaryHorizontal(offset);
|
|
||||||
final float secondary = layout.getSecondaryHorizontal(offset);
|
|
||||||
// TODO: This doesn't work perfectly for text with custom styles and TAB
|
|
||||||
// chars.
|
|
||||||
final float left;
|
|
||||||
final float right;
|
|
||||||
if (ltrLine) {
|
|
||||||
if (isRtl) {
|
|
||||||
left = secondary - charWidth;
|
|
||||||
right = secondary;
|
|
||||||
} else {
|
|
||||||
left = primary;
|
|
||||||
right = primary + charWidth;
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
if (!isRtl) {
|
|
||||||
left = secondary;
|
|
||||||
right = secondary + charWidth;
|
|
||||||
} else {
|
|
||||||
left = primary - charWidth;
|
|
||||||
right = primary;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
// TODO: Check top-right and bottom-left as well.
|
|
||||||
final float localLeft = left + viewportToContentHorizontalOffset;
|
|
||||||
final float localRight = right + viewportToContentHorizontalOffset;
|
|
||||||
final float localTop = top + viewportToContentVerticalOffset;
|
|
||||||
final float localBottom = bottom + viewportToContentVerticalOffset;
|
|
||||||
final boolean isTopLeftVisible = isPositionVisible(textView,
|
|
||||||
localLeft, localTop);
|
|
||||||
final boolean isBottomRightVisible =
|
|
||||||
isPositionVisible(textView, localRight, localBottom);
|
|
||||||
int characterBoundsFlags = 0;
|
|
||||||
if (isTopLeftVisible || isBottomRightVisible) {
|
|
||||||
characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION;
|
|
||||||
}
|
|
||||||
if (!isTopLeftVisible || !isTopLeftVisible) {
|
|
||||||
characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION;
|
|
||||||
}
|
|
||||||
if (isRtl) {
|
|
||||||
characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL;
|
|
||||||
}
|
|
||||||
// Here offset is the index in Java chars.
|
|
||||||
builder.addCharacterBounds(offset, localLeft, localTop, localRight,
|
|
||||||
localBottom, characterBoundsFlags);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
// Treat selectionStart as the insertion point.
|
|
||||||
if (0 <= selectionStart) {
|
|
||||||
final int offset = selectionStart;
|
|
||||||
final int line = layout.getLineForOffset(offset);
|
|
||||||
final float insertionMarkerX = layout.getPrimaryHorizontal(offset)
|
|
||||||
+ viewportToContentHorizontalOffset;
|
|
||||||
final float insertionMarkerTop = layout.getLineTop(line)
|
|
||||||
+ viewportToContentVerticalOffset;
|
|
||||||
final float insertionMarkerBaseline = layout.getLineBaseline(line)
|
|
||||||
+ viewportToContentVerticalOffset;
|
|
||||||
final float insertionMarkerBottom = layout.getLineBottom(line)
|
|
||||||
+ viewportToContentVerticalOffset;
|
|
||||||
final boolean isTopVisible =
|
|
||||||
isPositionVisible(textView, insertionMarkerX, insertionMarkerTop);
|
|
||||||
final boolean isBottomVisible =
|
|
||||||
isPositionVisible(textView, insertionMarkerX, insertionMarkerBottom);
|
|
||||||
int insertionMarkerFlags = 0;
|
|
||||||
if (isTopVisible || isBottomVisible) {
|
|
||||||
insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION;
|
|
||||||
}
|
|
||||||
if (!isTopVisible || !isBottomVisible) {
|
|
||||||
insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION;
|
|
||||||
}
|
|
||||||
if (layout.isRtlCharAt(offset)) {
|
|
||||||
insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL;
|
|
||||||
}
|
|
||||||
builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop,
|
|
||||||
insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags);
|
|
||||||
}
|
|
||||||
return builder.build();
|
|
||||||
}
|
|
||||||
}
|
|
||||||
Loading…
Add table
Reference in a new issue