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Move CSV parser to KeySpecParser 

Change-Id: I424fb47bc70e9b6aaa5a16ae9b2500d23da75c26
main
Tadashi G. Takaoka 2012-02-02 15:56:38 +09:00
parent e01d272603
commit 0086861d5a
5 changed files with 149 additions and 151 deletions
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165
java/src/com/android/inputmethod/keyboard/internal/KeySpecParser.java
View File

@ -30,20 +30,28 @@ import java.util.Arrays;
/**
* String parser of moreKeys attribute of Key.
* The string is comma separated texts each of which represents one "more key".
* - String resource can be embedded into specification @string/name. This is done before parsing
* comma.
* Each "more key" specification is one of the following:
* - A single letter (Letter)
* - Label optionally followed by keyOutputText or code (keyLabel|keyOutputText).
* - Icon followed by keyOutputText or code (@icon/icon_name|@integer/key_code)
* Special character, comma ',' backslash '\', and bar '|' can be escaped by '\'
* character.
* Special character, comma ',' backslash '\', and bar '|' can be escaped by '\' character.
* Note that the character '@' and '\' are also parsed by XML parser and CSV parser as well.
* See {@link KeyboardIconsSet} about icon_number.
* See {@link KeyboardIconsSet} about icon_name.
*/
public class KeySpecParser {
private static final boolean DEBUG = LatinImeLogger.sDBG;
// Constants for parsing.
private static int COMMA = ',';
private static final char ESCAPE_CHAR = '\\';
private static final char PREFIX_AT = '@';
private static final char SUFFIX_SLASH = '/';
private static final String PREFIX_STRING = PREFIX_AT + "string";
private static final char LABEL_END = '|';
private static final String PREFIX_ICON = Utils.PREFIX_AT + "icon" + Utils.SUFFIX_SLASH;
private static final String PREFIX_CODE = Utils.PREFIX_AT + "integer" + Utils.SUFFIX_SLASH;
private static final String PREFIX_ICON = PREFIX_AT + "icon" + SUFFIX_SLASH;
private static final String PREFIX_CODE = PREFIX_AT + "integer" + SUFFIX_SLASH;
private static final String ADDITIONAL_MORE_KEY_MARKER = "%";
private KeySpecParser() {
@ -56,7 +64,7 @@ public class KeySpecParser {
if (end > 0) {
return true;
}
throw new MoreKeySpecParserError("outputText or code not specified: " + moreKeySpec);
throw new KeySpecParserError("outputText or code not specified: " + moreKeySpec);
}
return false;
}
@ -71,14 +79,14 @@ public class KeySpecParser {
}
private static String parseEscape(String text) {
if (text.indexOf(Utils.ESCAPE_CHAR) < 0) {
if (text.indexOf(ESCAPE_CHAR) < 0) {
return text;
}
final int length = text.length();
final StringBuilder sb = new StringBuilder();
for (int pos = 0; pos < length; pos++) {
final char c = text.charAt(pos);
if (c == Utils.ESCAPE_CHAR && pos + 1 < length) {
if (c == ESCAPE_CHAR && pos + 1 < length) {
// Skip escape char
pos++;
sb.append(text.charAt(pos));
@ -90,17 +98,17 @@ public class KeySpecParser {
}
private static int indexOfLabelEnd(String moreKeySpec, int start) {
if (moreKeySpec.indexOf(Utils.ESCAPE_CHAR, start) < 0) {
if (moreKeySpec.indexOf(ESCAPE_CHAR, start) < 0) {
final int end = moreKeySpec.indexOf(LABEL_END, start);
if (end == 0) {
throw new MoreKeySpecParserError(LABEL_END + " at " + start + ": " + moreKeySpec);
throw new KeySpecParserError(LABEL_END + " at " + start + ": " + moreKeySpec);
}
return end;
}
final int length = moreKeySpec.length();
for (int pos = start; pos < length; pos++) {
final char c = moreKeySpec.charAt(pos);
if (c == Utils.ESCAPE_CHAR && pos + 1 < length) {
if (c == ESCAPE_CHAR && pos + 1 < length) {
// Skip escape char
pos++;
} else if (c == LABEL_END) {
@ -118,7 +126,7 @@ public class KeySpecParser {
final String label = (end > 0) ? parseEscape(moreKeySpec.substring(0, end))
: parseEscape(moreKeySpec);
if (TextUtils.isEmpty(label)) {
throw new MoreKeySpecParserError("Empty label: " + moreKeySpec);
throw new KeySpecParserError("Empty label: " + moreKeySpec);
}
return label;
}
@ -130,7 +138,7 @@ public class KeySpecParser {
final int end = indexOfLabelEnd(moreKeySpec, 0);
if (end > 0) {
if (indexOfLabelEnd(moreKeySpec, end + 1) >= 0) {
throw new MoreKeySpecParserError("Multiple " + LABEL_END + ": "
throw new KeySpecParserError("Multiple " + LABEL_END + ": "
+ moreKeySpec);
}
final String outputText = parseEscape(
@ -138,11 +146,11 @@ public class KeySpecParser {
if (!TextUtils.isEmpty(outputText)) {
return outputText;
}
throw new MoreKeySpecParserError("Empty outputText: " + moreKeySpec);
throw new KeySpecParserError("Empty outputText: " + moreKeySpec);
}
final String label = getLabel(moreKeySpec);
if (label == null) {
throw new MoreKeySpecParserError("Empty label: " + moreKeySpec);
throw new KeySpecParserError("Empty label: " + moreKeySpec);
}
// Code is automatically generated for one letter label. See {@link getCode()}.
return (Utils.codePointCount(label) == 1) ? null : label;
@ -152,9 +160,9 @@ public class KeySpecParser {
if (hasCode(moreKeySpec)) {
final int end = indexOfLabelEnd(moreKeySpec, 0);
if (indexOfLabelEnd(moreKeySpec, end + 1) >= 0) {
throw new MoreKeySpecParserError("Multiple " + LABEL_END + ": " + moreKeySpec);
throw new KeySpecParserError("Multiple " + LABEL_END + ": " + moreKeySpec);
}
final int resId = Utils.getResourceId(res,
final int resId = getResourceId(res,
moreKeySpec.substring(end + /* LABEL_END */1 + /* PREFIX_AT */1),
R.string.english_ime_name);
final int code = res.getInteger(resId);
@ -251,9 +259,128 @@ public class KeySpecParser {
}
@SuppressWarnings("serial")
public static class MoreKeySpecParserError extends RuntimeException {
public MoreKeySpecParserError(String message) {
public static class KeySpecParserError extends RuntimeException {
public KeySpecParserError(String message) {
super(message);
}
}
private static int getResourceId(Resources res, String name, int packageNameResId) {
String packageName = res.getResourcePackageName(packageNameResId);
int resId = res.getIdentifier(name, null, packageName);
if (resId == 0) {
throw new RuntimeException("Unknown resource: " + name);
}
return resId;
}
private static String resolveStringResource(String text, Resources res, int packageNameResId) {
final int size = text.length();
if (size < PREFIX_STRING.length()) {
return text;
}
StringBuilder sb = null;
for (int pos = 0; pos < size; pos++) {
final char c = text.charAt(pos);
if (c == PREFIX_AT && text.startsWith(PREFIX_STRING, pos)) {
if (sb == null) {
sb = new StringBuilder(text.substring(0, pos));
}
final int end = searchResourceNameEnd(text, pos + PREFIX_STRING.length());
final String resName = text.substring(pos + 1, end);
final int resId = getResourceId(res, resName, packageNameResId);
sb.append(res.getString(resId));
pos = end - 1;
} else if (c == ESCAPE_CHAR) {
pos++;
if (sb != null) {
sb.append(c);
if (pos < size) {
sb.append(text.charAt(pos));
}
}
} else if (sb != null) {
sb.append(c);
}
}
return (sb == null) ? text : sb.toString();
}
private static int searchResourceNameEnd(String text, int start) {
final int size = text.length();
if (start >= size || text.charAt(start) != SUFFIX_SLASH) {
throw new RuntimeException("Resource name not specified");
}
for (int pos = start + 1; pos < size; pos++) {
final char c = text.charAt(pos);
// String resource name should be consisted of [a-z_0-9].
if ((c >= 'a' && c <= 'z') || c == '_' || (c >= '0' && c <= '9')) {
continue;
}
return pos;
}
return size;
}
public static String[] parseCsvString(String rawText, Resources res, int packageNameResId) {
final String text = resolveStringResource(rawText, res, packageNameResId);
final int size = text.length();
if (size == 0) {
return null;
}
if (Utils.codePointCount(text) == 1) {
return new String[] { text };
}
final StringBuilder sb = new StringBuilder();
ArrayList<String> list = null;
int start = 0;
for (int pos = 0; pos < size; pos++) {
final char c = text.charAt(pos);
if (c == COMMA) {
if (list == null) {
list = new ArrayList<String>();
}
if (sb.length() == 0) {
list.add(text.substring(start, pos));
} else {
list.add(sb.toString());
sb.setLength(0);
}
// Skip comma
start = pos + 1;
continue;
}
// TODO: Only parse escaped comma. Other escaped character should be passed through
// with escaped character prefixed.
// Skip escaped sequence.
if (c == ESCAPE_CHAR) {
if (start == pos) {
// Skip escaping comma at the beginning of the text.
start++;
pos++;
} else {
if (start < pos && sb.length() == 0) {
sb.append(text.substring(start, pos));
}
// Skip comma
pos++;
if (pos < size) {
sb.append(text.charAt(pos));
}
}
} else if (sb.length() > 0) {
sb.append(c);
}
}
if (list == null) {
return new String[] {
sb.length() > 0 ? sb.toString() : text.substring(start)
};
} else {
list.add(sb.length() > 0 ? sb.toString() : text.substring(start));
return list.toArray(new String[list.size()]);
}
}
}

3
java/src/com/android/inputmethod/keyboard/internal/KeyStyles.java
View File

@ -21,7 +21,6 @@ import android.util.Log;
import com.android.inputmethod.keyboard.Keyboard;
import com.android.inputmethod.latin.R;
import com.android.inputmethod.latin.Utils;
import com.android.inputmethod.latin.XmlParseUtils;
import org.xmlpull.v1.XmlPullParser;
@ -72,7 +71,7 @@ public class KeyStyles {
protected static String[] parseStringArray(TypedArray a, int index) {
if (!a.hasValue(index))
return null;
return Utils.parseCsvString(
return KeySpecParser.parseCsvString(
a.getString(index), a.getResources(), R.string.english_ime_name);
}
}

2
java/src/com/android/inputmethod/latin/SettingsValues.java
View File

@ -100,7 +100,7 @@ public class SettingsValues {
}
}
}
final String[] suggestPuncsSpec = Utils.parseCsvString(
final String[] suggestPuncsSpec = KeySpecParser.parseCsvString(
res.getString(R.string.suggested_punctuations), res, R.string.english_ime_name);
mSuggestPuncs = createSuggestPuncs(suggestPuncsSpec);
mSuggestPuncList = createSuggestPuncList(suggestPuncsSpec);

127
java/src/com/android/inputmethod/latin/Utils.java
View File

@ -62,12 +62,6 @@ public class Utils {
private static boolean DBG = LatinImeLogger.sDBG;
private static boolean DBG_EDIT_DISTANCE = false;
// Constants for resource name parsing.
public static final char ESCAPE_CHAR = '\\';
public static final char PREFIX_AT = '@';
public static final char SUFFIX_SLASH = '/';
private static final String PREFIX_STRING = PREFIX_AT + "string";
private Utils() {
// Intentional empty constructor for utility class.
}
@ -804,125 +798,4 @@ public class Utils {
if (TextUtils.isEmpty(text)) return 0;
return text.codePointCount(0, text.length());
}
// TODO: Move these methods to KeySpecParser.
public static int getResourceId(Resources res, String name, int packageNameResId) {
String packageName = res.getResourcePackageName(packageNameResId);
int resId = res.getIdentifier(name, null, packageName);
if (resId == 0) {
throw new RuntimeException("Unknown resource: " + name);
}
return resId;
}
public static String resolveStringResource(String text, Resources res, int packageNameResId) {
final int size = text.length();
if (size < PREFIX_STRING.length()) {
return text;
}
StringBuilder sb = null;
for (int pos = 0; pos < size; pos++) {
final char c = text.charAt(pos);
if (c == PREFIX_AT && text.startsWith(PREFIX_STRING, pos)) {
if (sb == null) {
sb = new StringBuilder(text.substring(0, pos));
}
final int end = Utils.searchResourceNameEnd(text, pos + PREFIX_STRING.length());
final String resName = text.substring(pos + 1, end);
final int resId = getResourceId(res, resName, packageNameResId);
sb.append(res.getString(resId));
pos = end - 1;
} else if (c == ESCAPE_CHAR) {
pos++;
if (sb != null) {
sb.append(c);
if (pos < size) {
sb.append(text.charAt(pos));
}
}
} else if (sb != null) {
sb.append(c);
}
}
return (sb == null) ? text : sb.toString();
}
private static int searchResourceNameEnd(String text, int start) {
final int size = text.length();
if (start >= size || text.charAt(start) != SUFFIX_SLASH) {
throw new RuntimeException("Resource name not specified");
}
for (int pos = start + 1; pos < size; pos++) {
final char c = text.charAt(pos);
// String resource name should be consisted of [a-z_0-9].
if ((c >= 'a' && c <= 'z') || c == '_' || (c >= '0' && c <= '9')) {
continue;
}
return pos;
}
return size;
}
private static int COMMA = ',';
public static String[] parseCsvString(String rawText, Resources res, int packageNameResId) {
final String text = resolveStringResource(rawText, res, packageNameResId);
final int size = text.length();
if (size == 0) {
return null;
}
if (codePointCount(text) == 1) {
return new String[] { text };
}
final StringBuilder sb = new StringBuilder();
ArrayList<String> list = null;
int start = 0;
for (int pos = 0; pos < size; pos++) {
final char c = text.charAt(pos);
if (c == COMMA) {
if (list == null) {
list = new ArrayList<String>();
}
if (sb.length() == 0) {
list.add(text.substring(start, pos));
} else {
list.add(sb.toString());
sb.setLength(0);
}
// Skip comma
start = pos + 1;
continue;
}
// Skip escaped sequence.
if (c == ESCAPE_CHAR) {
if (start == pos) {
// Skip escaping comma at the beginning of the text.
start++;
pos++;
} else {
if (start < pos && sb.length() == 0) {
sb.append(text.substring(start, pos));
}
// Skip comma
pos++;
if (pos < size) {
sb.append(text.charAt(pos));
}
}
} else if (sb.length() > 0) {
sb.append(c);
}
}
if (list == null) {
return new String[] {
sb.length() > 0 ? sb.toString() : text.substring(start)
};
} else {
list.add(sb.length() > 0 ? sb.toString() : text.substring(start));
return list.toArray(new String[list.size()]);
}
}
}

3
tests/src/com/android/inputmethod/keyboard/internal/CsvParserTests.java
View File

@ -20,7 +20,6 @@ import android.content.res.Resources;
import android.test.AndroidTestCase;
import android.text.TextUtils;
import com.android.inputmethod.latin.Utils;
import com.android.inputmethod.latin.tests.R;
import java.util.Arrays;
@ -40,7 +39,7 @@ public class CsvParserTests extends AndroidTestCase {
}
private void assertTextArray(String message, String value, String ... expected) {
final String actual[] = Utils.parseCsvString(value, mTestResources,
final String actual[] = KeySpecParser.parseCsvString(value, mTestResources,
R.string.empty_string);
if (expected.length == 0) {
assertNull(message, actual);