@Override
public void visitElement(@NonNull XmlContext context, @NonNull Element element) {
int declaredRowCount = getInt(element, ATTR_ROW_COUNT, -1);
int declaredColumnCount = getInt(element, ATTR_COLUMN_COUNT, -1);
if (declaredColumnCount != -1 || declaredRowCount != -1) {
for (Element child : LintUtils.getChildren(element)) {
if (declaredColumnCount != -1) {
int column = getInt(child, ATTR_LAYOUT_COLUMN, -1);
if (column >= declaredColumnCount) {
Attr node = child.getAttributeNodeNS(ANDROID_URI, ATTR_LAYOUT_COLUMN);
context.report(
ISSUE,
node,
context.getLocation(node),
String.format(
"Column attribute (%1$d) exceeds declared grid column count (%2$d)",
column, declaredColumnCount));
}
}
if (declaredRowCount != -1) {
int row = getInt(child, ATTR_LAYOUT_ROW, -1);
if (row > declaredRowCount) {
Attr node = child.getAttributeNodeNS(ANDROID_URI, ATTR_LAYOUT_ROW);
context.report(
ISSUE,
node,
context.getLocation(node),
String.format(
"Row attribute (%1$d) exceeds declared grid row count (%2$d)",
row, declaredRowCount));
}
}
}
}
if (element.getTagName().equals(FQCN_GRID_LAYOUT_V7)) {
// Make sure that we're not using android: namespace attributes where we should
// be using app namespace attributes!
ensureAppNamespace(context, element, ATTR_COLUMN_COUNT);
ensureAppNamespace(context, element, ATTR_ORIENTATION);
ensureAppNamespace(context, element, ATTR_ROW_COUNT);
ensureAppNamespace(context, element, ATTR_USE_DEFAULT_MARGINS);
ensureAppNamespace(context, element, "alignmentMode");
ensureAppNamespace(context, element, "columnOrderPreserved");
ensureAppNamespace(context, element, "rowOrderPreserved");
for (Element child : LintUtils.getChildren(element)) {
ensureAppNamespace(context, child, ATTR_LAYOUT_COLUMN);
ensureAppNamespace(context, child, ATTR_LAYOUT_COLUMN_SPAN);
ensureAppNamespace(context, child, ATTR_LAYOUT_GRAVITY);
ensureAppNamespace(context, child, ATTR_LAYOUT_ROW);
ensureAppNamespace(context, child, ATTR_LAYOUT_ROW_SPAN);
}
}
}
@Override
public void visitAttribute(@NonNull XmlContext context, @NonNull Attr attribute) {
String value = attribute.getValue();
if (value.isEmpty() || value.trim().isEmpty()) {
context.report(
ISSUE,
attribute,
context.getLocation(attribute),
"onClick attribute value cannot be empty",
null);
} else if (!value.equals(value.trim())) {
context.report(
ISSUE,
attribute,
context.getLocation(attribute),
"There should be no whitespace around attribute values",
null);
} else {
if (mNames == null) {
mNames = new HashMap<String, Location.Handle>();
}
Handle handle = context.parser.createLocationHandle(context, attribute);
handle.setClientData(attribute);
// Replace unicode characters with the actual value since that's how they
// appear in the ASM signatures
if (value.contains("\\u")) { // $NON-NLS-1$
Pattern pattern = Pattern.compile("\\\\u(\\d\\d\\d\\d)"); // $NON-NLS-1$
Matcher matcher = pattern.matcher(value);
StringBuilder sb = new StringBuilder(value.length());
int remainder = 0;
while (matcher.find()) {
sb.append(value.substring(0, matcher.start()));
String unicode = matcher.group(1);
int hex = Integer.parseInt(unicode, 16);
sb.append((char) hex);
remainder = matcher.end();
}
sb.append(value.substring(remainder));
value = sb.toString();
}
mNames.put(value, handle);
}
}
@Override
public void visitAttribute(@NonNull XmlContext context, @NonNull Attr attribute) {
assert attribute.getName().equals(ATTR_ID) || attribute.getLocalName().equals(ATTR_ID);
String id = attribute.getValue();
if (context.getPhase() == 1) {
if (mIds.contains(id)) {
Location location = context.getLocation(attribute);
Attr first = findIdAttribute(attribute.getOwnerDocument(), id);
if (first != null && first != attribute) {
Location secondLocation = context.getLocation(first);
secondLocation.setMessage(String.format("%1$s originally defined here", id));
location.setSecondary(secondLocation);
}
context.report(
WITHIN_LAYOUT,
attribute,
location,
String.format("Duplicate id %1$s, already defined earlier in this layout", id),
null);
} else if (id.startsWith(NEW_ID_PREFIX)) {
// Skip id's on include tags
if (attribute.getOwnerElement().getTagName().equals(VIEW_INCLUDE)) {
return;
}
mIds.add(id);
}
} else {
Collection<Multimap<String, Occurrence>> maps = mLocations.get(context.file);
if (maps != null && !maps.isEmpty()) {
for (Multimap<String, Occurrence> map : maps) {
if (!maps.isEmpty()) {
Collection<Occurrence> occurrences = map.get(id);
if (occurrences != null && !occurrences.isEmpty()) {
for (Occurrence occurrence : occurrences) {
if (context.getDriver().isSuppressed(CROSS_LAYOUT, attribute)) {
return;
}
Location location = context.getLocation(attribute);
location.setClientData(attribute);
location.setMessage(occurrence.message);
location.setSecondary(occurrence.location);
occurrence.location = location;
}
}
}
}
}
}
}
@Override
public void visitElement(@NonNull XmlContext context, @NonNull Element element) {
// Traverse all child elements
NodeList childNodes = element.getChildNodes();
int count = childNodes.getLength();
Map<String, LayoutNode> nodes = Maps.newHashMap();
for (int i = 0; i < count; i++) {
Node node = childNodes.item(i);
if (node.getNodeType() == Node.ELEMENT_NODE) {
LayoutNode ln = new LayoutNode((Element) node, i);
nodes.put(ln.getNodeId(), ln);
}
}
// Node map is populated, recalculate nodes sizes
for (LayoutNode ln : nodes.values()) {
ln.processNode(nodes);
}
for (LayoutNode right : nodes.values()) {
if (!right.mLastLeft || right.skip()) {
continue;
}
Set<LayoutNode> canGrowLeft = right.canGrowLeft();
for (LayoutNode left : nodes.values()) {
if (left == right || !left.mLastRight || left.skip() || !left.sameBucket(right)) {
continue;
}
Set<LayoutNode> canGrowRight = left.canGrowRight();
if (canGrowLeft.size() > 0 || canGrowRight.size() > 0) {
canGrowRight.addAll(canGrowLeft);
LayoutNode nodeToBlame = right;
LayoutNode otherNode = left;
if (!canGrowRight.contains(right) && canGrowRight.contains(left)) {
nodeToBlame = left;
otherNode = right;
}
context.report(
ISSUE,
nodeToBlame.getNode(),
context.getLocation(nodeToBlame.getNode()),
String.format(
"`%1$s` can overlap `%2$s` if %3$s %4$s due to localized text expansion",
nodeToBlame.getNodeId(),
otherNode.getNodeId(),
Joiner.on(", ").join(canGrowRight),
canGrowRight.size() > 1 ? "grow" : "grows"));
}
}
}
}
@Override
public void visitAttribute(@NonNull XmlContext context, @NonNull Attr attribute) {
String value = attribute.getValue();
if (!value.isEmpty() && (value.charAt(0) != '@' && value.charAt(0) != '?')) {
// Make sure this is really one of the android: attributes
if (!ANDROID_URI.equals(attribute.getNamespaceURI())) {
return;
}
context.report(
ISSUE,
attribute,
context.getLocation(attribute),
String.format("[I18N] Hardcoded string \"%1$s\", should use `@string` resource", value));
}
}
private static void ensureAppNamespace(XmlContext context, Element element, String name) {
Attr attribute = element.getAttributeNodeNS(ANDROID_URI, name);
if (attribute != null) {
String prefix = getNamespacePrefix(element.getOwnerDocument(), AUTO_URI);
boolean haveNamespace = prefix != null;
if (!haveNamespace) {
prefix = "app";
}
StringBuilder sb = new StringBuilder();
sb.append("Wrong namespace; with v7 `GridLayout` you should use ")
.append(prefix)
.append(":")
.append(name);
if (!haveNamespace) {
sb.append(" (and add `xmlns:app=\"").append(AUTO_URI).append("\"` to your root element.)");
}
String message = sb.toString();
context.report(ISSUE, attribute, context.getLocation(attribute), message);
}
}