1 files changed, 244 insertions, 0 deletions
diff --git a/libs/ui/Keyboard.cpp b/libs/ui/Keyboard.cpp
new file mode 100644
index 0000000..de76e25
--- /dev/null
+++ b/libs/ui/Keyboard.cpp
@@ -0,0 +1,244 @@
+/*
+ * Copyright (C) 2010 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.
+ */
+
+#define LOG_TAG "Keyboard"
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <limits.h>
+
+#include <ui/Keyboard.h>
+#include <ui/KeycodeLabels.h>
+#include <utils/Errors.h>
+#include <utils/Log.h>
+#include <cutils/properties.h>
+
+namespace android {
+
+static void selectKeyMap(KeyMapInfo& keyMapInfo, const String8& keyMapName, bool defaultKeyMap) {
+    if (keyMapInfo.keyMapName.isEmpty()) {
+        keyMapInfo.keyMapName.setTo(keyMapName);
+        keyMapInfo.isDefaultKeyMap = defaultKeyMap;
+    }
+}
+
+static bool probeKeyMap(KeyMapInfo& keyMapInfo, const String8& keyMapName, bool defaultKeyMap) {
+    const char* root = getenv("ANDROID_ROOT");
+
+    // TODO Consider also looking somewhere in a writeable partition like /data for a
+    //      custom keymap supplied by the user for this device.
+    bool haveKeyLayout = !keyMapInfo.keyLayoutFile.isEmpty();
+    if (!haveKeyLayout) {
+        keyMapInfo.keyLayoutFile.setTo(root);
+        keyMapInfo.keyLayoutFile.append("/usr/keylayout/");
+        keyMapInfo.keyLayoutFile.append(keyMapName);
+        keyMapInfo.keyLayoutFile.append(".kl");
+        if (access(keyMapInfo.keyLayoutFile.string(), R_OK)) {
+            keyMapInfo.keyLayoutFile.clear();
+        } else {
+            haveKeyLayout = true;
+        }
+    }
+
+    bool haveKeyCharacterMap = !keyMapInfo.keyCharacterMapFile.isEmpty();
+    if (!haveKeyCharacterMap) {
+        keyMapInfo.keyCharacterMapFile.setTo(root);
+        keyMapInfo.keyCharacterMapFile.append("/usr/keychars/");
+        keyMapInfo.keyCharacterMapFile.append(keyMapName);
+        keyMapInfo.keyCharacterMapFile.append(".kcm");
+        if (access(keyMapInfo.keyCharacterMapFile.string(), R_OK)) {
+            keyMapInfo.keyCharacterMapFile.clear();
+        } else {
+            haveKeyCharacterMap = true;
+        }
+    }
+
+    if (haveKeyLayout || haveKeyCharacterMap) {
+        selectKeyMap(keyMapInfo, keyMapName, defaultKeyMap);
+    }
+    return haveKeyLayout && haveKeyCharacterMap;
+}
+
+status_t resolveKeyMap(const String8& deviceName, KeyMapInfo& outKeyMapInfo) {
+    // As an initial key map name, try using the device name.
+    String8 keyMapName(deviceName);
+    char* p = keyMapName.lockBuffer(keyMapName.size());
+    while (*p) {
+        if (*p == ' ') *p = '_';
+        p++;
+    }
+    keyMapName.unlockBuffer();
+
+    if (probeKeyMap(outKeyMapInfo, keyMapName, false)) return OK;
+
+    // TODO Consider allowing the user to configure a specific key map somehow.
+
+    // Try the Generic key map.
+    // TODO Apply some additional heuristics here to figure out what kind of
+    //      generic key map to use (US English, etc.).
+    keyMapName.setTo("Generic");
+    if (probeKeyMap(outKeyMapInfo, keyMapName, true)) return OK;
+
+    // Give up!
+    keyMapName.setTo("unknown");
+    selectKeyMap(outKeyMapInfo, keyMapName, true);
+    LOGE("Could not determine key map for device '%s'.", deviceName.string());
+    return NAME_NOT_FOUND;
+}
+
+void setKeyboardProperties(int32_t deviceId, const String8& deviceName,
+        const KeyMapInfo& keyMapInfo) {
+    char propName[PROPERTY_KEY_MAX];
+    snprintf(propName, sizeof(propName), "hw.keyboards.%u.devname", deviceId);
+    property_set(propName, deviceName.string());
+    snprintf(propName, sizeof(propName), "hw.keyboards.%u.keymap", deviceId);
+    property_set(propName, keyMapInfo.keyMapName.string());
+    snprintf(propName, sizeof(propName), "hw.keyboards.%u.klfile", deviceId);
+    property_set(propName, keyMapInfo.keyLayoutFile.string());
+    snprintf(propName, sizeof(propName), "hw.keyboards.%u.kcmfile", deviceId);
+    property_set(propName, keyMapInfo.keyCharacterMapFile.string());
+}
+
+void clearKeyboardProperties(int32_t deviceId) {
+    char propName[PROPERTY_KEY_MAX];
+    snprintf(propName, sizeof(propName), "hw.keyboards.%u.devname", deviceId);
+    property_set(propName, "");
+    snprintf(propName, sizeof(propName), "hw.keyboards.%u.keymap", deviceId);
+    property_set(propName, "");
+    snprintf(propName, sizeof(propName), "hw.keyboards.%u.klfile", deviceId);
+    property_set(propName, "");
+    snprintf(propName, sizeof(propName), "hw.keyboards.%u.kcmfile", deviceId);
+    property_set(propName, "");
+}
+
+status_t getKeyCharacterMapFile(int32_t deviceId, String8& outKeyCharacterMapFile) {
+    char propName[PROPERTY_KEY_MAX];
+    char fn[PROPERTY_VALUE_MAX];
+    snprintf(propName, sizeof(propName), "hw.keyboards.%u.kcmfile", deviceId);
+    if (property_get(propName, fn, "") > 0) {
+        outKeyCharacterMapFile.setTo(fn);
+        return OK;
+    }
+
+    const char* root = getenv("ANDROID_ROOT");
+    char path[PATH_MAX];
+    if (deviceId == DEVICE_ID_VIRTUAL_KEYBOARD) {
+        snprintf(path, sizeof(path), "%s/usr/keychars/Virtual.kcm", root);
+        if (!access(path, R_OK)) {
+            outKeyCharacterMapFile.setTo(path);
+            return OK;
+        }
+    }
+
+    snprintf(path, sizeof(path), "%s/usr/keychars/Generic.kcm", root);
+    if (!access(path, R_OK)) {
+        outKeyCharacterMapFile.setTo(path);
+        return OK;
+    }
+
+    LOGE("Can't find any key character map files (also tried %s)", path);
+    return NAME_NOT_FOUND;
+}
+
+static int lookupLabel(const char* literal, const KeycodeLabel *list) {
+    while (list->literal) {
+        if (strcmp(literal, list->literal) == 0) {
+            return list->value;
+        }
+        list++;
+    }
+    return list->value;
+}
+
+int32_t getKeyCodeByLabel(const char* label) {
+    return int32_t(lookupLabel(label, KEYCODES));
+}
+
+uint32_t getKeyFlagByLabel(const char* label) {
+    return uint32_t(lookupLabel(label, FLAGS));
+}
+
+static int32_t setEphemeralMetaState(int32_t mask, bool down, int32_t oldMetaState) {
+    int32_t newMetaState;
+    if (down) {
+        newMetaState = oldMetaState | mask;
+    } else {
+        newMetaState = oldMetaState &
+                ~(mask | AMETA_ALT_ON | AMETA_SHIFT_ON | AMETA_CTRL_ON | AMETA_META_ON);
+    }
+
+    if (newMetaState & (AMETA_ALT_LEFT_ON | AMETA_ALT_RIGHT_ON)) {
+        newMetaState |= AMETA_ALT_ON;
+    }
+
+    if (newMetaState & (AMETA_SHIFT_LEFT_ON | AMETA_SHIFT_RIGHT_ON)) {
+        newMetaState |= AMETA_SHIFT_ON;
+    }
+
+    if (newMetaState & (AMETA_CTRL_LEFT_ON | AMETA_CTRL_RIGHT_ON)) {
+        newMetaState |= AMETA_CTRL_ON;
+    }
+
+    if (newMetaState & (AMETA_META_LEFT_ON | AMETA_META_RIGHT_ON)) {
+        newMetaState |= AMETA_META_ON;
+    }
+    return newMetaState;
+}
+
+static int32_t toggleLockedMetaState(int32_t mask, bool down, int32_t oldMetaState) {
+    if (down) {
+        return oldMetaState;
+    } else {
+        return oldMetaState ^ mask;
+    }
+}
+
+int32_t updateMetaState(int32_t keyCode, bool down, int32_t oldMetaState) {
+    int32_t mask;
+    switch (keyCode) {
+    case AKEYCODE_ALT_LEFT:
+        return setEphemeralMetaState(AMETA_ALT_LEFT_ON, down, oldMetaState);
+    case AKEYCODE_ALT_RIGHT:
+        return setEphemeralMetaState(AMETA_ALT_RIGHT_ON, down, oldMetaState);
+    case AKEYCODE_SHIFT_LEFT:
+        return setEphemeralMetaState(AMETA_SHIFT_LEFT_ON, down, oldMetaState);
+    case AKEYCODE_SHIFT_RIGHT:
+        return setEphemeralMetaState(AMETA_SHIFT_RIGHT_ON, down, oldMetaState);
+    case AKEYCODE_SYM:
+        return setEphemeralMetaState(AMETA_SYM_ON, down, oldMetaState);
+    case AKEYCODE_FUNCTION:
+        return setEphemeralMetaState(AMETA_FUNCTION_ON, down, oldMetaState);
+    case AKEYCODE_CTRL_LEFT:
+        return setEphemeralMetaState(AMETA_CTRL_LEFT_ON, down, oldMetaState);
+    case AKEYCODE_CTRL_RIGHT:
+        return setEphemeralMetaState(AMETA_CTRL_RIGHT_ON, down, oldMetaState);
+    case AKEYCODE_META_LEFT:
+        return setEphemeralMetaState(AMETA_META_LEFT_ON, down, oldMetaState);
+    case AKEYCODE_META_RIGHT:
+        return setEphemeralMetaState(AMETA_META_RIGHT_ON, down, oldMetaState);
+    case AKEYCODE_CAPS_LOCK:
+        return toggleLockedMetaState(AMETA_CAPS_LOCK_ON, down, oldMetaState);
+    case AKEYCODE_NUM_LOCK:
+        return toggleLockedMetaState(AMETA_NUM_LOCK_ON, down, oldMetaState);
+    case AKEYCODE_SCROLL_LOCK:
+        return toggleLockedMetaState(AMETA_SCROLL_LOCK_ON, down, oldMetaState);
+    default:
+        return oldMetaState;
+    }
+}
+
+
+} // namespace android