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Merge "Refactor KeySpecParser a bit"

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This commit is contained in:
Tadashi G. Takaoka 2014-02-05 09:17:00 +00:00 committed by Android (Google) Code Review
commit 6a16fa1f10
1 changed files with 56 additions and 47 deletions
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103
java/src/com/android/inputmethod/keyboard/internal/KeySpecParser.java
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@ -56,10 +56,9 @@ public final class KeySpecParser {
return keySpec.startsWith(KeyboardIconsSet.PREFIX_ICON);
}
private static boolean hasCode(final String keySpec) {
final int end = indexOfLabelEnd(keySpec, 0);
if (end > 0 && end + 1 < keySpec.length() && keySpec.startsWith(
KeyboardCodesSet.PREFIX_CODE, end + 1)) {
private static boolean hasCode(final String keySpec, final int labelEnd) {
if (labelEnd > 0 && labelEnd + 1 < keySpec.length()
&& keySpec.startsWith(KeyboardCodesSet.PREFIX_CODE, labelEnd + 1)) {
return true;
}
return false;
@ -84,16 +83,16 @@ public final class KeySpecParser {
return sb.toString();
}
private static int indexOfLabelEnd(final String keySpec, final int start) {
if (keySpec.indexOf(BACKSLASH, start) < 0) {
final int end = keySpec.indexOf(VERTICAL_BAR, start);
if (end == 0) {
throw new KeySpecParserError(VERTICAL_BAR + " at " + start + ": " + keySpec);
private static int indexOfLabelEnd(final String keySpec) {
if (keySpec.indexOf(BACKSLASH) < 0) {
final int labelEnd = keySpec.indexOf(VERTICAL_BAR);
if (labelEnd == 0) {
throw new KeySpecParserError("Empty label");
}
return end;
return labelEnd;
}
final int length = keySpec.length();
for (int pos = start; pos < length; pos++) {
for (int pos = 0; pos < length; pos++) {
final char c = keySpec.charAt(pos);
if (c == BACKSLASH && pos + 1 < length) {
// Skip escape char
@ -105,35 +104,47 @@ public final class KeySpecParser {
return -1;
}
private static String getBeforeLabelEnd(final String keySpec, final int labelEnd) {
return (labelEnd < 0) ? keySpec : keySpec.substring(0, labelEnd);
}
private static String getAfterLabelEnd(final String keySpec, final int labelEnd) {
return keySpec.substring(labelEnd + /* VERTICAL_BAR */1);
}
private static void checkDoubleLabelEnd(final String keySpec, final int labelEnd) {
if (indexOfLabelEnd(getAfterLabelEnd(keySpec, labelEnd)) < 0) {
return;
}
throw new KeySpecParserError("Multiple " + VERTICAL_BAR + ": " + keySpec);
}
public static String getLabel(final String keySpec) {
if (hasIcon(keySpec)) {
return null;
}
final int end = indexOfLabelEnd(keySpec, 0);
final String label = (end > 0) ? parseEscape(keySpec.substring(0, end))
: parseEscape(keySpec);
final int labelEnd = indexOfLabelEnd(keySpec);
final String label = parseEscape(getBeforeLabelEnd(keySpec, labelEnd));
if (label.isEmpty()) {
throw new KeySpecParserError("Empty label: " + keySpec);
}
return label;
}
private static String getOutputTextInternal(final String keySpec) {
final int end = indexOfLabelEnd(keySpec, 0);
if (end <= 0) {
private static String getOutputTextInternal(final String keySpec, final int labelEnd) {
if (labelEnd <= 0) {
return null;
}
if (indexOfLabelEnd(keySpec, end + 1) >= 0) {
throw new KeySpecParserError("Multiple " + VERTICAL_BAR + ": " + keySpec);
}
return parseEscape(keySpec.substring(end + /* VERTICAL_BAR */1));
checkDoubleLabelEnd(keySpec, labelEnd);
return parseEscape(getAfterLabelEnd(keySpec, labelEnd));
}
public static String getOutputText(final String keySpec) {
if (hasCode(keySpec)) {
final int labelEnd = indexOfLabelEnd(keySpec);
if (hasCode(keySpec, labelEnd)) {
return null;
}
final String outputText = getOutputTextInternal(keySpec);
final String outputText = getOutputTextInternal(keySpec, labelEnd);
if (outputText != null) {
if (StringUtils.codePointCount(outputText) == 1) {
// If output text is one code point, it should be treated as a code.
@ -154,14 +165,12 @@ public final class KeySpecParser {
}
public static int getCode(final String keySpec, final KeyboardCodesSet codesSet) {
if (hasCode(keySpec)) {
final int end = indexOfLabelEnd(keySpec, 0);
if (indexOfLabelEnd(keySpec, end + 1) >= 0) {
throw new KeySpecParserError("Multiple " + VERTICAL_BAR + ": " + keySpec);
final int labelEnd = indexOfLabelEnd(keySpec);
if (hasCode(keySpec, labelEnd)) {
checkDoubleLabelEnd(keySpec, labelEnd);
return parseCode(getAfterLabelEnd(keySpec, labelEnd), codesSet, CODE_UNSPECIFIED);
}
return parseCode(keySpec.substring(end + 1), codesSet, CODE_UNSPECIFIED);
}
final String outputText = getOutputTextInternal(keySpec);
final String outputText = getOutputTextInternal(keySpec, labelEnd);
if (outputText != null) {
// If output text is one code point, it should be treated as a code.
// See {@link #getOutputText(String)}.
@ -171,36 +180,36 @@ public final class KeySpecParser {
return CODE_OUTPUT_TEXT;
}
final String label = getLabel(keySpec);
// Code is automatically generated for one letter label.
if (StringUtils.codePointCount(label) == 1) {
return label.codePointAt(0);
if (label == null) {
throw new KeySpecParserError("Empty label: " + keySpec);
}
return CODE_OUTPUT_TEXT;
// Code is automatically generated for one letter label.
return (StringUtils.codePointCount(label) == 1) ? label.codePointAt(0) : CODE_OUTPUT_TEXT;
}
public static int parseCode(final String text, final KeyboardCodesSet codesSet,
final int defCode) {
if (text == null) return defCode;
if (text == null) {
return defCode;
}
if (text.startsWith(KeyboardCodesSet.PREFIX_CODE)) {
return codesSet.getCode(text.substring(KeyboardCodesSet.PREFIX_CODE.length()));
} else if (text.startsWith(PREFIX_HEX)) {
return Integer.parseInt(text.substring(PREFIX_HEX.length()), 16);
} else {
return Integer.parseInt(text);
}
if (text.startsWith(PREFIX_HEX)) {
return Integer.parseInt(text.substring(PREFIX_HEX.length()), 16);
}
return Integer.parseInt(text);
}
public static int getIconId(final String keySpec) {
if (keySpec != null && hasIcon(keySpec)) {
final int end = keySpec.indexOf(
VERTICAL_BAR, KeyboardIconsSet.PREFIX_ICON.length());
final String name = (end < 0)
? keySpec.substring(KeyboardIconsSet.PREFIX_ICON.length())
: keySpec.substring(KeyboardIconsSet.PREFIX_ICON.length(), end);
return KeyboardIconsSet.getIconId(name);
}
if (!hasIcon(keySpec)) {
return KeyboardIconsSet.ICON_UNDEFINED;
}
final int labelEnd = indexOfLabelEnd(keySpec);
final String iconName = getBeforeLabelEnd(keySpec, labelEnd)
.substring(KeyboardIconsSet.PREFIX_ICON.length());
return KeyboardIconsSet.getIconId(iconName);
}
@SuppressWarnings("serial")
public static final class KeySpecParserError extends RuntimeException {