diff options
Diffstat (limited to 'plugins/primary_selection.lua')
| -rw-r--r-- | plugins/primary_selection.lua | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/plugins/primary_selection.lua b/plugins/primary_selection.lua new file mode 100644 index 0000000..388caf0 --- /dev/null +++ b/plugins/primary_selection.lua @@ -0,0 +1,187 @@ +-- mod-version:3 +local core = require "core" +local Doc = require "core.doc" +local command = require "core.command" +local keymap = require "core.keymap" +local config = require "core.config" +local common = require "core.common" + +local function string_to_cmd(s) + local result = {} + for match in s:gmatch("%g+") do + table.insert(result, match) + end + return result +end + +config.plugins.primary_selection = common.merge({ + command_in = { "xclip", "-in", "-selection", "primary" }, -- Command to use to copy the selection + command_out = { "xclip", "-out", "-selection", "primary" }, -- Command to use to obtain the selection + set_cursor = true, -- Set cursor on middle mouse click + min_copy_time = 0.150, -- How much time to delay setting the selection; in seconds + config_spec = { + name = "Primary selection", + { + label = "Command copy", + description = "Command to use to copy the selection.", + path = "_command_in", + type = "string", + default = "xclip -in -selection primary", + on_apply = function(value) + config.plugins.primary_selection.command_in = string_to_cmd(value) + end, + }, + { + label = "Command paste", + description = "Command to use to obtain the selection.", + path = "_command_out", + type = "string", + default = "xclip -out -selection primary", + on_apply = function(value) + config.plugins.primary_selection.command_out = string_to_cmd(value) + end, + }, + { + label = "Set cursor", + description = "Set cursor on middle mouse click.", + path = "set_cursor", + type = "toggle", + default = true, + }, + { + label = "Copy timeout", + description = "How much time to delay setting the selection; in milliseconds.", + path = "min_copy_time_ms", + type = "number", + default = 150, + min = 0, + step = 50, + on_apply = function(value) + config.plugins.primary_selection.min_copy_time = value / 1000 + end + }, + } +}, config.plugins.primary_selection) + + +local last_selection_data +--[[ + = { + time = nil, + line1 = nil, + col1 = nil, + line2 = nil, + col2 = nil, + doc = nil, +} +]] + +local xclip_copy +local function delayed_copy() + while true do + local data = last_selection_data + if not data then return end + local current_time = system.get_time() + local diff_time = current_time - data.time + -- Check if enough time has passed since last selection change + if diff_time >= config.plugins.primary_selection.min_copy_time then + if xclip_copy then xclip_copy:terminate() end + if not config.plugins.primary_selection.command_in + or #config.plugins.primary_selection.command_in == 0 then + core.warn("No primary selection copy command set") + break + end + xclip_copy = process.start(config.plugins.primary_selection.command_in) + if not xclip_copy then + core.warn("Unable to start copy command") + break + end + local text = data.doc:get_text(data.line1, data.col1, data.line2, data.col2) + local nbytes = #text + local total_written = 0 + -- In some rare cases xclip isn't fast enough so we need to retry sending the data + local retry = 3 + repeat + local written, err = xclip_copy:write(text) + if written == 0 or not written then + if retry > 0 then + retry = retry - 1 + else + core.error("Error while setting primary selection. "..(err or "")) + break + end + else + retry = 3 + end + total_written = total_written + written + text = string.sub(text, written + 1) + until total_written >= nbytes + xclip_copy:close_stream(process.STREAM_STDIN) + -- We need to leave the process running as killing it would destroy the copied buffer + break + end + coroutine.yield() + end + last_selection_data = nil +end + + +local doc_set_selections = Doc.set_selections +function Doc:set_selections(...) + local result = doc_set_selections(self, ...) + local line1, col1, line2, col2 + line1, col1, line2, col2 = self:get_selection() + if line1 ~= line2 or col1 ~= col2 then + if not last_selection_data then + -- Start "timer" to confirm the selection only after `min_copy_time` has passed + core.add_thread(delayed_copy) + last_selection_data = { } + end + -- We could extract the text here, but it is a potentially heavy operation, + -- so we do it only when we're actually confirming the selection. + -- The drawback is that if the selection is overwritten/deleted, + -- it is either never sent, or is different than expected. + -- TODO: Confirm the selection on text change. + last_selection_data.time = system.get_time() + last_selection_data.line1 = line1 + last_selection_data.col1 = col1 + last_selection_data.line2 = line2 + last_selection_data.col2 = col2 + last_selection_data.doc = self + end + return result +end + + +command.add("core.docview", { + ["primary-selection:paste"] = function(x, y, clicks, ...) + if not config.plugins.primary_selection.command_out + or #config.plugins.primary_selection.command_out == 0 then + core.warn("No primary selection paste command set") + return + end + if x and config.plugins.primary_selection.set_cursor then + -- TODO: There must be a better way to do this + core.on_event("mousepressed", "left", x, y, clicks, ...) + core.on_event("mousereleased", "left", x, y, clicks, ...) + end + local xclip = process.start(config.plugins.primary_selection.command_out) + if not xclip then + core.warn("Unable to start paste command") + return + end + local text = {} + repeat + local buffer = xclip:read_stdout() + table.insert(text, buffer or "") + until not buffer + if #text > 0 then + core.active_view.doc:text_input(table.concat(text)) + end + end +}) + +keymap.add({ + ["1mclick"] = "primary-selection:paste" +}) + |