From c2c608b4a1c1239e8fe3b8594bbbbef3eb84da0f Mon Sep 17 00:00:00 2001
From: Caleb Maclennan <caleb@alerque.com>
Date: Thu, 3 Oct 2024 17:43:07 +0300
Subject: [PATCH] feat(shapers): Add dummy shaper for use with alternative
 backends that don't need shaping

---
 core/sile.lua     |  4 ++--
 shapers/dummy.lua | 28 ++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 2 deletions(-)
 create mode 100644 shapers/dummy.lua

diff --git a/core/sile.lua b/core/sile.lua
index 5ba8cca61..1c8bf90a4 100644
--- a/core/sile.lua
+++ b/core/sile.lua
@@ -222,10 +222,10 @@ function SILE.init ()
       SILE.shaper = SILE.shapers.harfbuzz()
       SILE.outputter = SILE.outputters.debug()
    elseif SILE.backend == "text" then
-      SILE.shaper = SILE.shapers.harfbuzz()
+      SILE.shaper = SILE.shapers.dummy()
       SILE.outputter = SILE.outputters.text()
    elseif SILE.backend == "dummy" then
-      SILE.shaper = SILE.shapers.harfbuzz()
+      SILE.shaper = SILE.shapers.dummy()
       SILE.outputter = SILE.outputters.dummy()
    end
    SILE.pagebuilder = SILE.pagebuilders.base()
diff --git a/shapers/dummy.lua b/shapers/dummy.lua
new file mode 100644
index 000000000..ebccab530
--- /dev/null
+++ b/shapers/dummy.lua
@@ -0,0 +1,28 @@
+local base = require("shapers.base")
+
+local shaper = pl.class(base)
+shaper._name = "dummy"
+
+function shaper.addShapedGlyphToNnodeValue (_, _, _) end
+
+function shaper.checkHBProblems (_, _, _) end
+
+function shaper.debugVersions (_) end
+
+function shaper.getFace () end
+
+function shaper.makeSpaceNode (_, _, _) end
+
+function shaper.preAddNodes (_, _, _) end
+
+function shaper:createNnodes (_, _) end
+
+function shaper:formNnode (_, _, _) end
+
+function shaper:measureChar (_) end
+
+function shaper:measureSpace (_) end
+
+function shaper:shapeToken (_, _) end
+
+return shaper