Implement 'add image' screen language statement.

renpy/sl2/slast.py

@@ -1377,6 +1377,106 @@ class SLDisplayable(SLBlock):
             i.dump_const(prefix + "  ")
 
 
+class SLAddImage(SLDisplayable):
+    def __init__(self, loc, name):
+        super().__init__(loc, None, name=name, unique=False)
+
+    def execute(self, context):
+        debug = context.debug
+
+        cache = context.old_cache.get(self.serial, None) or context.miss_cache.get(self.serial, None)
+
+        # We use and check 'displayable', 'constant' and 'old_showif'
+        # fields, and rest are left unchanged.
+        if not isinstance(cache, SLCache):
+            cache = SLCache()
+
+        context.new_cache[self.serial] = cache
+
+        if debug:
+            self.debug_line()
+
+        # Add image does not use style or scope.
+        if cache.constant is not None:
+            d = cache.constant
+
+            if context.showif is not None:
+                d = self.wrap_in_showif(d, context, cache)
+
+            context.children.append(d)
+
+            if debug:
+                profile_log.write("    reused constant displayable")
+
+            return
+
+        # Create the context.
+        ctx = SLContext(context)
+
+        # True if we encountered an exception that we're recovering from
+        # due to being in prediction mode.
+        fail = False
+
+        # Result transform to display.
+        d = None
+
+        try:
+            ctx.keywords = {}
+
+            SLBlock.keywords(self, ctx)
+
+            d = ctx.keywords.pop("at")
+            assert not ctx.keywords, ctx.keywords
+
+            if debug:
+                self.report_arguments(cache, (), {}, None)
+
+            d._location = self.location
+
+            cache.copy_on_change = False # We no longer need to copy on change.
+
+            if debug:
+                if self.constant:
+                    profile_log.write("    created constant displayable")
+                else:
+                    profile_log.write("    created displayable")
+
+        except Exception:
+            if not context.predicting:
+                raise
+            fail = True
+
+        if self.variable is not None:
+            context.scope[self.variable] = d
+
+        old_d = cache.displayable
+
+        if old_d is not None:
+            d.take_state(old_d)
+            d.take_execution_state(old_d)
+
+        # If a failure occurred during prediction, predict main (if known),
+        # and return.
+        if fail:
+            predict_displayable(d)
+            context.fail = True
+            return
+
+        cache.displayable = d
+
+        if ctx.fail:
+            context.fail = True
+
+        else:
+            if self.constant:
+                cache.constant = d
+
+        if context.showif is not None:
+            d = self.wrap_in_showif(d, context, cache)
+
+        context.children.append(d)
+
+
 class SLIf(SLNode):
     """
     A screen language AST node that corresponds to an If/Elif/Else statement.

renpy/sl2/slparser.py

@@ -194,21 +194,42 @@ class Parser(object):
                 self.keyword[i.prefix + j + i.name] = i
 
         elif isinstance(i, Parser):
-            self.children[i.name] = i
+            self.children[tuple(i.name.split())] = i
 
     def parse_statement(self, loc, l, layout_mode=False, keyword=True):
-        word = l.word() or l.match(r'\$')
-
-        if word and word in self.children:
-            if layout_mode:
-                c = self.children[word].parse_layout(loc, l, self, keyword)
-            else:
-                c = self.children[word].parse(loc, l, self, keyword)
-
-            return c
+        # Look for one-line python only once.
+        if l.match(r'\$'):
+            if ("$", ) in self.children:
+                assert not layout_mode, "One-line python can not be in layout mode."
+                return self.children["$", ].parse(loc, l, self, keyword)
             else:
                 return None
 
+        name = ()
+        while True:
+            cp = l.checkpoint()
+            word = l.word()
+            if not word:
+                break
+
+            # Look for more specialized child parser.
+            new_name = (*name, word)
+            if new_name not in self.children:
+                l.revert(cp)
+                break
+
+            name = new_name
+
+        if not name:
+            return None
+
+        if layout_mode:
+            c = self.children[name].parse_layout(loc, l, self, keyword)
+        else:
+            c = self.children[name].parse(loc, l, self, keyword)
+
+        return c
+
     def parse_layout(self, loc, l, parent, keyword):
         l.error("The %s statement cannot be used as a container for the has statement." % self.name)
 
@@ -229,7 +250,16 @@ class Parser(object):
 
         raise Exception("Not Implemented")
 
-    def parse_contents(self, l, target, layout_mode=False, can_has=False, can_tag=False, block_only=False, keyword=True):
+    def parse_contents(
+        self,
+        l, target,
+        layout_mode=False,
+        can_has=False,
+        can_tag=False,
+        block_only=False,
+        keyword=True,
+        line_only=False,
+    ):
         """
         Parses the remainder of the current line of `l`, and all of its subblock,
         looking for keywords and children.
@@ -247,6 +277,10 @@ class Parser(object):
 
         `block_only`
             If true, only parse the block and not the initial properties.
+
+        `line_only`
+            If true, only parse initial properties and not the block.
+            Lexer ends before the colon (if any).
         """
 
         seen_keywords = set()
@@ -330,7 +364,13 @@ class Parser(object):
             # If not block_only, we allow keyword arguments on the starting
             # line.
             while True:
+                cp = l.checkpoint()
                 if l.match(':'):
+                    # If line_only, we stop before the colon.
+                    if line_only:
+                        l.revert(cp)
+                        block = False
+                    else:
                         l.expect_eol()
                         l.expect_block(self.name)
                         block = True
@@ -700,6 +740,24 @@ class DisplayableParser(Parser):
         return rv
 
 
+class AddImageParser(Parser):
+    def __init__(self, name):
+        super().__init__(name)
+        self.variable = True
+
+    def parse(self, loc, l, parent, keyword):
+        rv = slast.SLAddImage(loc, self.name)
+
+        self.parse_contents(l, rv, line_only=True)
+        l.require(':')
+        l.expect_eol()
+        l.expect_block("ATL block")
+        rv.atl_transform = renpy.atl.parse_atl(l.subblock_lexer()) # type: ignore
+        return rv
+
+AddImageParser("add image")
+
+
 class IfParser(Parser):
 
     def __init__(self, name, node_type, parent_contents):