1 files changed, 50 insertions, 0 deletions
diff --git a/script/method/textDocument/signatureHelp.lua b/script/method/textDocument/signatureHelp.lua
new file mode 100644
index 00000000..01d6289d
--- /dev/null
+++ b/script/method/textDocument/signatureHelp.lua
@@ -0,0 +1,50 @@
+local core = require 'core'
+
+return function (lsp, params)
+    local uri = params.textDocument.uri
+    local vm, lines = lsp:loadVM(uri)
+    if not vm then
+        return
+    end
+    local position = lines:position(params.position.line + 1, params.position.character + 1)
+    local hovers = core.signature(vm, position)
+    if not hovers then
+        return
+    end
+
+    local hover = hovers[1]
+    local desc = {}
+    desc[#desc+1] = hover.description
+    local active
+    local signatures = {}
+    for i, hover in ipairs(hovers) do
+        local signature = {
+            label = hover.label,
+            documentation = {
+                kind = 'markdown',
+                value = table.concat(desc, '\n'),
+            },
+        }
+        if hover.argLabel then
+            if not active then
+                active = i
+            end
+            signature.parameters = {
+                {
+                    label = {
+                        hover.argLabel[1] - 1,
+                        hover.argLabel[2],
+                    }
+                }
+            }
+        end
+        signatures[i] = signature
+    end
+
+    local response = {
+        signatures = signatures,
+        activeSignature = active and active - 1 or 0,
+    }
+
+    return response
+end