1 files changed, 131 insertions, 0 deletions
diff --git a/WordPress/src/main/java/org/wordpress/android/ui/reader/utils/ReaderHtmlUtils.java b/WordPress/src/main/java/org/wordpress/android/ui/reader/utils/ReaderHtmlUtils.java
new file mode 100644
index 000000000..7f980b490
--- /dev/null
+++ b/WordPress/src/main/java/org/wordpress/android/ui/reader/utils/ReaderHtmlUtils.java
@@ -0,0 +1,131 @@
+package org.wordpress.android.ui.reader.utils;
+
+import android.net.Uri;
+
+import org.wordpress.android.util.StringUtils;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class ReaderHtmlUtils {
+
+    public interface HtmlScannerListener {
+        void onTagFound(String tag, String src);
+    }
+
+    // regex for matching oriwidth attributes in tags
+    private static final Pattern ORIGINAL_WIDTH_ATTR_PATTERN = Pattern.compile(
+            "data-orig-size\\s*=\\s*(?:'|\")(.*?),.*?(?:'|\")",
+            Pattern.DOTALL|Pattern.CASE_INSENSITIVE);
+
+    private static final Pattern ORIGINAL_HEIGHT_ATTR_PATTERN = Pattern.compile(
+            "data-orig-size\\s*=\\s*(?:'|\").*?,(.*?)(?:'|\")",
+            Pattern.DOTALL|Pattern.CASE_INSENSITIVE);
+
+    // regex for matching width attributes in tags
+    private static final Pattern WIDTH_ATTR_PATTERN = Pattern.compile(
+            "width\\s*=\\s*(?:'|\")(.*?)(?:'|\")",
+            Pattern.DOTALL|Pattern.CASE_INSENSITIVE);
+
+    // regex for matching height attributes in tags
+    private static final Pattern HEIGHT_ATTR_PATTERN = Pattern.compile(
+            "height\\s*=\\s*(?:'|\")(.*?)(?:'|\")",
+            Pattern.DOTALL|Pattern.CASE_INSENSITIVE);
+
+    // regex for matching src attributes in tags
+    private static final Pattern SRC_ATTR_PATTERN = Pattern.compile(
+            "src\\s*=\\s*(?:'|\")(.*?)(?:'|\")",
+            Pattern.DOTALL|Pattern.CASE_INSENSITIVE);
+
+
+    /*
+    * returns the integer value from the data-orig-size attribute in the passed html tag
+    */
+    public static int getOriginalWidthAttrValue(final String tag) {
+        if (tag == null) {
+            return 0;
+        }
+
+        Matcher matcher = ORIGINAL_WIDTH_ATTR_PATTERN.matcher(tag);
+        if (matcher.find()) {
+            return StringUtils.stringToInt(matcher.group(1), 0);
+        } else {
+            return 0;
+        }
+    }
+
+    public static int getOriginalHeightAttrValue(final String tag) {
+        if (tag == null) {
+            return 0;
+        }
+
+        Matcher matcher = ORIGINAL_HEIGHT_ATTR_PATTERN.matcher(tag);
+        if (matcher.find()) {
+            return StringUtils.stringToInt(matcher.group(1), 0);
+        } else {
+            return 0;
+        }
+    }
+
+    /*
+    * returns the integer value from the width attribute in the passed html tag
+    */
+    public static int getWidthAttrValue(final String tag) {
+        if (tag == null) {
+            return 0;
+        }
+
+        Matcher matcher = WIDTH_ATTR_PATTERN.matcher(tag);
+        if (matcher.find()) {
+            // remove "width=" and quotes from the result
+            return StringUtils.stringToInt(tag.substring(matcher.start() + 7, matcher.end() - 1), 0);
+        } else {
+            return 0;
+        }
+    }
+
+    public static int getHeightAttrValue(final String tag) {
+        if (tag == null) {
+            return 0;
+        }
+        Matcher matcher = HEIGHT_ATTR_PATTERN.matcher(tag);
+        if (matcher.find()) {
+            return StringUtils.stringToInt(tag.substring(matcher.start() + 8, matcher.end() - 1), 0);
+        } else {
+            return 0;
+        }
+    }
+
+    /*
+     * returns the value from the src attribute in the passed html tag
+     */
+    public static String getSrcAttrValue(final String tag) {
+        if (tag == null) {
+            return null;
+        }
+
+        Matcher matcher = SRC_ATTR_PATTERN.matcher(tag);
+        if (matcher.find()) {
+            // remove "src=" and quotes from the result
+            return tag.substring(matcher.start() + 5, matcher.end() - 1);
+        } else {
+            return null;
+        }
+    }
+
+    /*
+     * returns the integer value of the passed query param in the passed url - returns zero
+     * if the url is invalid, or the param doesn't exist, or the param value could not be
+     * converted to an int
+     */
+    public static int getIntQueryParam(final String url,
+                                       @SuppressWarnings("SameParameterValue") final String param) {
+        if (url == null
+                || param == null
+                || !url.startsWith("http")
+                || !url.contains(param + "=")) {
+            return 0;
+        }
+        return StringUtils.stringToInt(Uri.parse(url).getQueryParameter(param));
+    }
+}