koreader: implement copy-to-clipboard

hosts/common/programs/koreader/2-02-colin-impl-clipboard-ops.lua

@@ -0,0 +1,40 @@
+local logger = require("logger")
+logger.info("applying colin patch colin-impl-clipboard")
+
+-- source: <https://github.com/ncopa/lua-shell/blob/master/shell.lua>
+local function shescape(arg)
+  if arg:match("[^A-Za-z0-9_/:=-]") then
+    arg = "'"..arg:gsub("'", "'\\''").."'"
+  end
+  return arg
+end
+
+-- 2023/12/15: the default setClipboardText doesn't do anything
+-- frontend/device/sdl/device.lua calls frontend/device/input.lua is noop
+local input = require("ffi/input")
+input.setClipboardText = function(text)
+  logger.info("input.setClipboardText")
+  local cmd = "wl-copy " .. shescape(text)
+  logger.info("invoke: " .. cmd)
+  os.execute(cmd)
+end
+
+-- 2023/12/15: the default ReaderLink "Copy" option (when clicking a URL) doesn't do anything
+-- patch so it calls `setClipboardText`
+local ReaderLink = require("apps/reader/modules/readerlink")
+local UIManager = require("ui/uimanager")
+local _ = require("gettext")
+local orig_ReaderLink_init = ReaderLink.init;
+ReaderLink.init = function(self)
+  orig_ReaderLink_init(self)
+  self._external_link_buttons["10_copy"] = function(this, link_url)
+    return {
+      text = _("Copy"),
+      callback = function()
+          UIManager:close(this.external_link_dialog)
+          input.setClipboardText(link_url)
+      end,
+    }
+  end
+end
+

hosts/common/programs/koreader/default.nix

@@ -38,9 +38,13 @@ in {
     package = pkgs.koreader-from-src;
     # koreader applies these lua "patches" at boot:
     # - <https://github.com/koreader/koreader/wiki/User-patches>
-    # - 2023/10/29: koreader code hasn't changed, but somehow FTP browser seems usable even without the isConnected patch now.
+    # the naming is IMPORTANT. these must start with a `2-` in order to be invoked during the right initialization phase
+    #
+    # 2023/10/29: koreader code hasn't changed, but somehow FTP browser seems usable even without the isConnected patch now.
     # fs.".config/koreader/patches/2-colin-NetworkManager-isConnected.lua".symlink.target = "${./2-colin-NetworkManager-isConnected.lua}";
 
+    fs.".config/koreader/patches/2-02-colin-impl-clipboard-ops.lua".symlink.target = "${./2-02-colin-impl-clipboard-ops.lua}";
+
     # koreader news plugin, enabled by default. file format described here:
     # - <repo:koreader/koreader:plugins/newsdownloader.koplugin/feed_config.lua>
     fs.".config/koreader/news/feed_config.lua".symlink.text = ''