When appending lines from a lua script, always append the new line to the end of the appropriate section, creating the section if needed

Originally committed to SVN as r6077.

aegisub/automation/tests/appended-lines.lua

@@ -0,0 +1,154 @@
+-- Automation 4 test file
+-- Test that appending lines to a file places the lines in the appropriate
+-- sections of the file, creating the sections if needed
+
+script_name = "TEST append lines"
+script_description = "Test that appended lines go to the right place"
+script_author = "Thomas Goyne"
+script_version = "1"
+
+function make_scriptinfo(key, value)
+    return {
+        class = "info",
+        section = "[Script Info]",
+        key = key,
+        value = value
+    }
+end
+
+function make_style(name)
+    return {
+        class = "style",
+        section = "[V4+ Styles]",
+        name = name,
+        fontname = "Arial",
+        fontsize = 20,
+        color1 = "&H000000&",
+        color2 = "&H000000&",
+        color3 = "&H000000&",
+        color4 = "&H000000&",
+        bold = true,
+        italic = false,
+        underline = false,
+        strikeout = false,
+        scale_x = 100,
+        scale_y = 100,
+        spacing = 0,
+        angle = 0,
+        borderstyle = 0,
+        outline = 0,
+        shadow = 0,
+        align = 5,
+        margin_l = 0,
+        margin_r = 0,
+        margin_t = 0,
+        margin_b = 0,
+        encoding = 0
+    }
+end
+function make_dialogue(text)
+    return {
+        class = "dialogue",
+        section = "[Events]",
+        comment = false,
+        layer = 0,
+        start_time = 0,
+        end_time = 2000,
+        style = "Default",
+        actor = "",
+        margin_l = 0,
+        margin_r = 0,
+        margin_t = 0,
+        margin_b = 0,
+        effect = "",
+        text = text
+    }
+end
+
+function make_header(name)
+    return {
+        class = "head",
+        section = name
+    }
+end
+
+function make_format(fstr, section)
+    return {
+        class = "format",
+        section = section,
+        text = fstr
+    }
+end
+
+function check_field(i, actual, expected, name)
+    if actual ~= expected then
+        error(i .. ": Expected '" .. expected .. "', got '" .. actual .. "' for " .. name)
+    end
+end
+
+function check_line(i, line, class, section)
+    check_field(i, line.class, class, "class")
+    check_field(i, line.section, section, "section")
+end
+
+function test(subs)
+    subs.deleterange(1, #subs)
+
+    -- verify that everything works with the items added in order
+    subs[0] = make_header("[Script Info]")
+    subs[0] = make_scriptinfo("Title", "Default Aegisub file")
+    subs[0] = make_scriptinfo("ScriptType", "v4.00+")
+    subs[0] = make_scriptinfo("WrapStyle", "0");
+    subs[0] = make_scriptinfo("ScaledBorderAndShadow", "yes")
+    subs[0] = make_scriptinfo("Collisions", "Normal")
+
+    subs[0] = make_header("[V4+ Styles]")
+    subs[0] = make_format("Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding", "[V4+ Styles]")
+    subs[0] = make_style("Default")
+
+    subs[0] = make_header("[Events]")
+    subs[0] = make_format("Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text", "[Events]")
+    subs[0] = make_dialogue("")
+
+    check_line(1, subs[1], "head", "[Script Info]")
+    check_line(2, subs[2], "info", "[Script Info]")
+    check_line(3, subs[3], "info", "[Script Info]")
+    check_line(4, subs[4], "info", "[Script Info]")
+    check_line(5, subs[5], "info", "[Script Info]")
+    check_line(6, subs[6], "info", "[Script Info]")
+
+    check_line(7, subs[7], "head", "[V4+ Styles]")
+    check_line(8, subs[8], "format", "[V4+ Styles]")
+    check_line(9, subs[9], "style", "[V4+ Styles]")
+
+    check_line(10, subs[10], "head", "[Events]")
+    check_line(11, subs[11], "format", "[Events]")
+    check_line(12, subs[12], "dialogue", "[Events]")
+
+    subs.deleterange(1, #subs)
+
+    -- test that groups appear in the order they're first used and lines are
+    -- put in the right group
+    subs[0] = make_scriptinfo("Title", "Script Title")
+    subs[0] = make_style("Default")
+    subs[0] = make_dialogue("Foo")
+    subs[0] = make_style("Default 2")
+    subs[0] = make_scriptinfo("ScriptType", "v4.00+")
+    subs[0] = make_dialogue("Bar")
+
+    check_line(1, subs[1], "head", "[Script Info]")
+    check_line(2, subs[2], "info", "[Script Info]")
+    check_line(3, subs[3], "info", "[Script Info]")
+
+    check_line(4, subs[4], "head", "[V4+ Styles]")
+    check_line(5, subs[5], "style", "[V4+ Styles]")
+    check_line(6, subs[6], "style", "[V4+ Styles]")
+
+    check_line(7, subs[7], "head", "[Events]")
+    check_line(8, subs[8], "dialogue", "[Events]")
+    check_line(9, subs[9], "dialogue", "[Events]")
+
+    aegisub.set_undo_point("append test")
+end
+
+aegisub.register_macro(script_name, script_description, test)

aegisub/src/auto4_lua_assfile.cpp

@@ -554,18 +554,39 @@ namespace Automation4 {
 			lua_pushvalue(L, i);
 			AssEntry *e = LuaToAssEntry(L);
 			modification_type |= modification_mask(*last_entry_ptr);
-			if (e->GetType() == ENTRY_DIALOGUE) {
-				// find insertion point, looking backwards
+
+			// Find the appropriate place to put it
 			std::list<AssEntry*>::iterator it = lines.end();
-				do { --it; } while ((*it)->GetType() != ENTRY_DIALOGUE);
-				// found last dialogue entry in file, move one past
+			if (!lines.empty()) {
+				do {
+					--it;
+				}
+				while (it != lines.begin() && (*it)->group != e->group);
+			}
+
+			if (it == lines.end() || (*it)->group != e->group) {
+				// The new entry belongs to a group that doesn't exist yet, so
+				// create it at the end of the file
+				if (e->GetEntryData() != e->group) {
+					// Add the header if the entry being added isn't a header
+					AssEntry *header = new AssEntry(e->group);
+					header->group = e->group;
+					lines.push_back(header);
+				}
+
+				lines.push_back(e);
+			}
+			else {
+				// Append the entry to the end of the existing group
 				++it;
 				lines.insert(it, e);
 			}
-			else {
-				lines.push_back(e);
-			}
 		}
+
+		// If last_entry_ptr is end, the file was empty but no longer is, so
+		// last_entry_id is wrong
+		if (last_entry_ptr == lines.end())
+			last_entry_id = lines.size() + 1;
 	}
 
 	void LuaAssFile::ObjectInsert(lua_State *L)