text_processing: add GlobMatch trait

Move GlobMatch trait from ui::mailcap to text_processing in order to use
it for glob matching folder paths in subscribed_folders field of
account configuration. See next commit.

text_processing/src/lib.rs

@@ -20,3 +20,57 @@ impl Truncate for &mut String {
         String::truncate(self, new_len);
     }
 }
+
+pub trait GlobMatch {
+    fn matches_glob(&self, s: &str) -> bool;
+    fn is_glob(&self) -> bool;
+}
+
+impl GlobMatch for str {
+    fn matches_glob(&self, s: &str) -> bool {
+        let parts = s.split("*");
+
+        let mut ptr = 0;
+        let mut part_no = 0;
+
+        for p in parts {
+            if p.is_empty() {
+                /* asterisk is at beginning and/or end of glob */
+                /* eg "*".split("*") gives ["", ""] */
+                part_no += 1;
+                continue;
+            }
+
+            if ptr >= self.len() {
+                return false;
+            }
+            if part_no > 0 {
+                while !&self[ptr..].starts_with(p) {
+                    ptr += 1;
+                    if ptr >= self.len() {
+                        return false;
+                    }
+                }
+            }
+            if !&self[ptr..].starts_with(p) {
+                return false;
+            }
+            ptr += p.len();
+            part_no += 1;
+        }
+        true
+    }
+
+    fn is_glob(&self) -> bool {
+        self.contains('*')
+    }
+}
+
+#[test]
+fn test_globmatch() {
+    assert!("INBOX".matches_glob("INBOX"));
+    assert!("INBOX/Sent".matches_glob("INBOX/*"));
+    assert!(!"INBOX/Sent".matches_glob("*/Drafts"));
+    assert!("INBOX/Sent".matches_glob("*/Sent"));
+    assert!("INBOX/Archives/2047".matches_glob("*"));
+}

ui/src/mailcap.rs

@@ -1,3 +1,23 @@
+/*
+ * meli
+ *
+ * Copyright 2019 Manos Pitsidianakis
+ *
+ * This file is part of meli.
+ *
+ * meli is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * meli is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with meli. If not, see <http://www.gnu.org/licenses/>.
+ */
 use crate::split_command;
 use crate::state::Context;
 use crate::types::{create_temp_file, ForkType, UIEvent};
@@ -8,6 +28,7 @@ use std::io::Read;
 use std::io::Write;
 use std::path::PathBuf;
 use std::process::{Command, Stdio};
+use text_processing::GlobMatch;
 
 pub struct MailcapEntry {
     command: String,
@@ -15,39 +36,6 @@ pub struct MailcapEntry {
     copiousoutput: bool,
 }
 
-trait GlobMatch {
-    fn matches_glob(&self, s: &str) -> bool;
-}
-
-impl GlobMatch for str {
-    fn matches_glob(&self, s: &str) -> bool {
-        let parts = self.split("*");
-
-        let mut ptr = 0;
-        let mut part_no = 0;
-
-        for p in parts {
-            if ptr >= s.len() {
-                return false;
-            }
-            if part_no > 0 {
-                while !&s[ptr..].starts_with(p) {
-                    ptr += 1;
-                    if ptr >= s.len() {
-                        return false;
-                    }
-                }
-            }
-            if !&s[ptr..].starts_with(p) {
-                return false;
-            }
-            ptr += p.len();
-            part_no += 1;
-        }
-        true
-    }
-}
-
 impl MailcapEntry {
     pub fn execute(a: &Attachment, context: &mut Context) -> Result<()> {
         /* lookup order: