add - read pair of parenthesis inside url

README.md

@@ -2,8 +2,8 @@
 
 
 * work only local image
-* can't use right parenthesis in url
 * `![aaa](bbb)` - In `bbb` part, if you put some behind url, it needs to be *behind* double quate. ex: `![alt text](a.jpg "title a1")`
+* if you use parenthesis inside bbb, the parenthesis must be paired in order to work.
 
 ```
 #local image, ok
@@ -12,14 +12,12 @@
 ![alt text](C:\aa bb\2023-12-30.png "title a1") #absolute path
 ![alt text](中/a c 文.jpg "title a1") #non ascii 
 ![alt text](file:///C:\Current Work\Service\12-30-34.png)
+![alt text](New folder/a002 (1) (2).jpg?key&ddd "title")
 
 #online image, no work
 ![alt text](https://example.com/img)
 ![alt text](http://example.com/img.jpg)
 
-#fail, duo to markdown image syntax limit, you can't use right parenthesis in url:
-![alt text](a (2).jpg "title a1") #wrong!
-
 #???
 ![alt text](//aa/bb/12-30-34.png)
 ![alt text](abc/a b.jpg =205x251)

__init__.py

@@ -23,20 +23,51 @@
 def log(s):
     #print(s)
     pass
-
+
+def right_parenthesis_index(txt):
+    """ get index of markdown image syntax's right parenthesis ) """
+    i = 0
+    right_parenthesis_index = 0 # ) index of markdown image syntax;     ![ ]( )
+                                #                                             ^
+
+    #In order to read:  folder/img (2).jpg  this type of url,
+    #![aaa](bbb), I assume bbb part **must** has multiple **pair** of parenthesis.
+    #if the number of right parenthesis != left parenthesis, right_parenthesis_index return 0
+    for index in range(0, len(txt)):
+        if txt[index] == "(":
+            i += 1
+        elif txt[index] == ")":
+            i -= 1
+            if i == 0:
+                right_parenthesis_index = index
+                break
+    return right_parenthesis_index
+
 def get_url(txt):
-    """input line_text, return url"""
-    #url can't mix with ), otherwise it become unsure ) is url or part of image syntax.
+    """input line_text, return url
+    The parenthesis must be paired in order to work."""
+    #In markdown's syntax, url can't mix with ), otherwise it become unsure ) is url or part of image syntax.
+    #But we can **assume** the parenthesis must be paired.
+
     x = re.findall("!\[[^\]]+\]\([^\)]+\)", txt) 
         #get image syntax ex: ![Stormtroopocat](https://octodex.github.com/images/stormtroopocat.jpg "The Stormtroopocat")
-    log(f"image syntax: {x}")
+    #log(f"image syntax: {x}")
     if not x:
-        log("Can't find image syntax.")
+        #log("Can't find image syntax.")
         return
+
+    x = txt[re.search("!\[[^\]]+\]\(", txt).end()-1:] #strip  ![xxx]  part
+    rp = right_parenthesis_index(x)
+    if not rp:
+        log("The parenthesis must be paired in order to work.")
+        return
+    p = x[:rp] #strip anything after right parenthesis), including itself
+    pp = p[1:] #strip prefix (
+
     #q = re.search("!\[[^\]]+\]", x[0]) #get title ex: ![sdff]
     #log(q.group()[2:-1])
-    p = re.search("\([^\)]+", x[0]) #get (... part ex: (https://octodex.github.com/images/stormtroopocat.jpg "The Stormtroopocat"
-    pp = p.group()[1:] #strip prefix (
+    #p = re.search("\([^\)]+", x[0]) #get (... part ex: (https://octodex.github.com/images/stormtroopocat.jpg "The Stormtroopocat"
+    #pp = p.group()[1:] #strip prefix (
     url = pp.split("\"")[0].strip() #get url
     url = url.split("?")[0] #strip query string  ex: cat.img?key&value > cat.img
     log(f"url: {url}")  
@@ -109,7 +140,6 @@ def insert_file(self, ed_self, txt, nline):
             filepath = ed_self.get_filename()
             fn = os.path.join(os.path.dirname(filepath), url)
 
-
         if not os.path.isfile(fn):
             ed_self.gap(GAP_DELETE, nline, nline)
             msg_status(PRE + _('Cannot find picture'))