1 files changed, 231 insertions, 0 deletions
diff --git a/native/jni/src/proximity_info_state.cpp b/native/jni/src/proximity_info_state.cpp
new file mode 100644
index 000000000..897ad46c4
--- /dev/null
+++ b/native/jni/src/proximity_info_state.cpp
@@ -0,0 +1,231 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <cstring> // for memset()
+#include <stdint.h>
+
+#define LOG_TAG "LatinIME: proximity_info_state.cpp"
+
+#include "defines.h"
+#include "geometry_utils.h"
+#include "proximity_info.h"
+#include "proximity_info_state.h"
+
+namespace latinime {
+void ProximityInfoState::initInputParams(const int pointerId, const float maxPointToKeyLength,
+        const ProximityInfo *proximityInfo, const int32_t *const inputCodes, const int inputSize,
+        const int *const xCoordinates, const int *const yCoordinates, const int *const times,
+        const int *const pointerIds, const bool isGeometric) {
+    mProximityInfo = proximityInfo;
+    mHasTouchPositionCorrectionData = proximityInfo->hasTouchPositionCorrectionData();
+    mMostCommonKeyWidthSquare = proximityInfo->getMostCommonKeyWidthSquare();
+    mLocaleStr = proximityInfo->getLocaleStr();
+    mKeyCount = proximityInfo->getKeyCount();
+    mCellHeight = proximityInfo->getCellHeight();
+    mCellWidth = proximityInfo->getCellWidth();
+    mGridHeight = proximityInfo->getGridWidth();
+    mGridWidth = proximityInfo->getGridHeight();
+
+    memset(mInputCodes, 0, sizeof(mInputCodes));
+
+    if (!isGeometric && pointerId == 0) {
+        // Initialize
+        // - mInputCodes
+        // - mNormalizedSquaredDistances
+        // TODO: Merge
+        for (int i = 0; i < inputSize; ++i) {
+            const int32_t primaryKey = inputCodes[i];
+            const int x = xCoordinates[i];
+            const int y = yCoordinates[i];
+            int *proximities = &mInputCodes[i * MAX_PROXIMITY_CHARS_SIZE_INTERNAL];
+            mProximityInfo->calculateNearbyKeyCodes(x, y, primaryKey, proximities);
+        }
+
+        if (DEBUG_PROXIMITY_CHARS) {
+            for (int i = 0; i < inputSize; ++i) {
+                AKLOGI("---");
+                for (int j = 0; j < MAX_PROXIMITY_CHARS_SIZE_INTERNAL; ++j) {
+                    int icc = mInputCodes[i * MAX_PROXIMITY_CHARS_SIZE_INTERNAL + j];
+                    int icfjc = inputCodes[i * MAX_PROXIMITY_CHARS_SIZE_INTERNAL + j];
+                    icc += 0;
+                    icfjc += 0;
+                    AKLOGI("--- (%d)%c,%c", i, icc, icfjc); AKLOGI("--- A<%d>,B<%d>", icc, icfjc);
+                }
+            }
+        }
+    }
+
+    ///////////////////////
+    // Setup touch points
+    mMaxPointToKeyLength = maxPointToKeyLength;
+    mInputXs.clear();
+    mInputYs.clear();
+    mTimes.clear();
+    mLengthCache.clear();
+    mDistanceCache.clear();
+
+    mInputSize = 0;
+    if (xCoordinates && yCoordinates) {
+        const bool proximityOnly = !isGeometric && (xCoordinates[0] < 0 || yCoordinates[0] < 0);
+        for (int i = 0; i < inputSize; ++i) {
+            // Assuming pointerId == 0 if pointerIds is null.
+            const int pid = pointerIds ? pointerIds[i] : 0;
+            if (pointerId == pid) {
+                ++mInputSize;
+                const int c = isGeometric ? NOT_A_COORDINATE : getPrimaryCharAt(i);
+                const int x = proximityOnly ? NOT_A_COORDINATE : xCoordinates[i];
+                const int y = proximityOnly ? NOT_A_COORDINATE : yCoordinates[i];
+                const int time = times ? times[i] : -1;
+                pushTouchPoint(c, x, y, time, isGeometric);
+            }
+        }
+    }
+
+    if (mInputSize > 0) {
+        const int keyCount = mProximityInfo->getKeyCount();
+        mDistanceCache.resize(mInputSize * keyCount);
+        for (int i = 0; i < mInputSize; ++i) {
+            for (int k = 0; k < keyCount; ++k) {
+                const int index = i * keyCount + k;
+                const int x = mInputXs[i];
+                const int y = mInputYs[i];
+                mDistanceCache[index] =
+                        mProximityInfo->getNormalizedSquaredDistanceFromCenterFloat(k, x, y);
+            }
+        }
+    }
+
+    // end
+    ///////////////////////
+
+    memset(mNormalizedSquaredDistances, NOT_A_DISTANCE, sizeof(mNormalizedSquaredDistances));
+    memset(mPrimaryInputWord, 0, sizeof(mPrimaryInputWord));
+    mTouchPositionCorrectionEnabled = mInputSize > 0 && mHasTouchPositionCorrectionData
+            && xCoordinates && yCoordinates && !isGeometric;
+    if (!isGeometric && pointerId == 0) {
+        for (int i = 0; i < inputSize; ++i) {
+            mPrimaryInputWord[i] = getPrimaryCharAt(i);
+        }
+
+        for (int i = 0; i < mInputSize && mTouchPositionCorrectionEnabled; ++i) {
+            const int *proximityChars = getProximityCharsAt(i);
+            const int primaryKey = proximityChars[0];
+            const int x = xCoordinates[i];
+            const int y = yCoordinates[i];
+            if (DEBUG_PROXIMITY_CHARS) {
+                int a = x + y + primaryKey;
+                a += 0;
+                AKLOGI("--- Primary = %c, x = %d, y = %d", primaryKey, x, y);
+            }
+            for (int j = 0; j < MAX_PROXIMITY_CHARS_SIZE_INTERNAL && proximityChars[j] > 0; ++j) {
+                const int currentChar = proximityChars[j];
+                const float squaredDistance =
+                        hasInputCoordinates() ? calculateNormalizedSquaredDistance(
+                                mProximityInfo->getKeyIndex(currentChar), i) :
+                                NOT_A_DISTANCE_FLOAT;
+                if (squaredDistance >= 0.0f) {
+                    mNormalizedSquaredDistances[i * MAX_PROXIMITY_CHARS_SIZE_INTERNAL + j] =
+                            (int) (squaredDistance * NORMALIZED_SQUARED_DISTANCE_SCALING_FACTOR);
+                } else {
+                    mNormalizedSquaredDistances[i * MAX_PROXIMITY_CHARS_SIZE_INTERNAL + j] =
+                            (j == 0) ? EQUIVALENT_CHAR_WITHOUT_DISTANCE_INFO :
+                                    PROXIMITY_CHAR_WITHOUT_DISTANCE_INFO;
+                }
+                if (DEBUG_PROXIMITY_CHARS) {
+                    AKLOGI("--- Proximity (%d) = %c", j, currentChar);
+                }
+            }
+        }
+    }
+}
+
+void ProximityInfoState::pushTouchPoint(const int nodeChar, int x, int y,
+        const int time, const bool sample) {
+    const uint32_t size = mInputXs.size();
+    // TODO: Should have a const variable for 10
+    const int sampleRate = mProximityInfo->getMostCommonKeyWidth() / 10;
+    if (size > 0) {
+        const int dist = getDistanceInt(x, y, mInputXs[size - 1], mInputYs[size - 1]);
+        if (sample && dist < sampleRate) {
+            return;
+        }
+        mLengthCache.push_back(mLengthCache[size - 1] + dist);
+    } else {
+        mLengthCache.push_back(0);
+    }
+    if (nodeChar >= 0 && (x < 0 || y < 0)) {
+        const int keyId = mProximityInfo->getKeyIndex(nodeChar);
+        if (keyId >= 0) {
+            x = mProximityInfo->getKeyCenterXOfIdG(keyId);
+            y = mProximityInfo->getKeyCenterYOfIdG(keyId);
+        }
+    }
+    mInputXs.push_back(x);
+    mInputYs.push_back(y);
+    mTimes.push_back(time);
+}
+
+float ProximityInfoState::calculateNormalizedSquaredDistance(
+        const int keyIndex, const int inputIndex) const {
+    if (keyIndex == NOT_AN_INDEX) {
+        return NOT_A_DISTANCE_FLOAT;
+    }
+    if (!mProximityInfo->hasSweetSpotData(keyIndex)) {
+        return NOT_A_DISTANCE_FLOAT;
+    }
+    if (NOT_A_COORDINATE == mInputXs[inputIndex]) {
+        return NOT_A_DISTANCE_FLOAT;
+    }
+    const float squaredDistance = calculateSquaredDistanceFromSweetSpotCenter(
+            keyIndex, inputIndex);
+    const float squaredRadius = square(mProximityInfo->getSweetSpotRadiiAt(keyIndex));
+    return squaredDistance / squaredRadius;
+}
+
+int ProximityInfoState::getDuration(const int index) const {
+    if (mTimes.size() == 0 || index <= 0 || index >= static_cast<int>(mInputSize) - 1) {
+        return 0;
+    }
+    return mTimes[index + 1] - mTimes[index - 1];
+}
+
+float ProximityInfoState::getPointToKeyLength(int inputIndex, int charCode, float scale) {
+    const int keyId = mProximityInfo->getKeyIndex(charCode);
+    if (keyId >= 0) {
+        const int index = inputIndex * mProximityInfo->getKeyCount() + keyId;
+        return min(mDistanceCache[index] * scale, mMaxPointToKeyLength);
+    }
+    return 0;
+}
+
+int ProximityInfoState::getKeyKeyDistance(int key0, int key1) {
+    return mProximityInfo->getKeyKeyDistanceG(key0, key1);
+}
+
+int ProximityInfoState::getSpaceY() {
+    const int keyId = mProximityInfo->getKeyIndex(' ');
+    return mProximityInfo->getKeyCenterYOfIdG(keyId);
+}
+
+float ProximityInfoState::calculateSquaredDistanceFromSweetSpotCenter(
+        const int keyIndex, const int inputIndex) const {
+    const float sweetSpotCenterX = mProximityInfo->getSweetSpotCenterXAt(keyIndex);
+    const float sweetSpotCenterY = mProximityInfo->getSweetSpotCenterYAt(keyIndex);
+    const float inputX = static_cast<float>(mInputXs[inputIndex]);
+    const float inputY = static_cast<float>(mInputYs[inputIndex]);
+    return square(inputX - sweetSpotCenterX) + square(inputY - sweetSpotCenterY);
+}
+} // namespace latinime