commands_manual.go

// Copyright 2013 The lime Authors.
// Use of this source code is governed by a 2-clause
// BSD-style license that can be found in the LICENSE file.

package api

import (
	"fmt"

	"github.com/jxo/lime"
	"github.com/jxo/lime/log"
	"github.com/jxo/lime/text"
	"github.com/jxo/lime/util"
	"github.com/limetext/gopy"
)

var (
	_ = lime.View{}
	_ = text.Region{}
)

var (
	_windowCommandGlueClass = py.Class{
		Name:    "sublime.WindowCommandGlue",
		Pointer: (*WindowCommandGlue)(nil),
	}
	_textCommandGlueClass = py.Class{
		Name:    "sublime.TextCommandGlue",
		Pointer: (*TextCommandGlue)(nil),
	}
	_applicationCommandGlueClass = py.Class{
		Name:    "sublime.ApplicationCommandGlue",
		Pointer: (*ApplicationCommandGlue)(nil),
	}
)

type (
	CommandGlue struct {
		py.BaseObject
		inner py.Object
		args  lime.Args
	}
	WindowCommandGlue struct {
		py.BaseObject
		CommandGlue
	}
	TextCommandGlue struct {
		py.BaseObject
		CommandGlue
	}
	ApplicationCommandGlue struct {
		py.BaseObject
		CommandGlue
	}
)

func (c *CommandGlue) Init(args lime.Args) error {
	c.args = args
	return nil
}

func (c *CommandGlue) BypassUndo() bool {
	return false
}

func (c *CommandGlue) PyInit(args *py.Tuple, kwds *py.Dict) error {
	if args.Size() != 1 {
		return fmt.Errorf("Expected only 1 argument not %d", args.Size())
	}
	if v, err := args.GetItem(0); err != nil {
		return pyError(err)
	} else {
		c.inner = v
	}
	c.inner.Incref()
	return nil
}

func (c *CommandGlue) CreatePyArgs(args lime.Args) (ret *py.Dict, err error) {
	if r, err := toPython(args); err != nil {
		return nil, err
	} else {
		return r.(*py.Dict), nil
	}
}

func (c *CommandGlue) callBool(name string, args lime.Args) bool {
	gs := py.GilState_Ensure()
	defer gs.Release()

	var (
		pyargs, r py.Object
		err       error
	)
	if pyargs, err = c.CreatePyArgs(args); err != nil {
		log.Error(err)
		return false
	}
	defer pyargs.Decref()

	if r, err = c.CallMethodObjArgs(name, pyargs); err != nil {
		log.Error(err)
		return true
	}
	defer r.Decref()
	if r, ok := r.(*py.Bool); ok {
		return r.Bool()
	}
	return true
}

func (c *CommandGlue) IsEnabled() bool {
	return c.callBool("is_enabled", c.args)
}

func (c *CommandGlue) IsVisible() bool {
	return c.callBool("is_visible", c.args)
}

func (c *CommandGlue) Description() string {
	gs := py.GilState_Ensure()
	defer gs.Release()

	var (
		pyargs, r py.Object
		err       error
	)
	if pyargs, err = c.CreatePyArgs(c.args); err != nil {
		log.Error(err)
		return ""
	}
	defer pyargs.Decref()

	if r, err = c.CallMethodObjArgs("description", pyargs); err != nil {
		log.Error(err)
		return ""
	}
	defer r.Decref()
	if r, ok := r.(*py.Unicode); ok {
		return r.String()
	}
	return ""
}

func pyError(err error) error {
	return fmt.Errorf("%v", err)
}

func (c *TextCommandGlue) Run(v *lime.View, e *lime.Edit) error {
	l := py.NewLock()
	defer l.Unlock()

	p0 := util.Prof.Enter("tc.run")
	defer p0.Exit()
	var (
		pyv, pye, pyargs, obj py.Object
		err                   error
	)
	if pyv, err = toPython(v); err != nil {
		return pyError(err)
	}
	defer pyv.Decref()

	if pye, err = toPython(e); err != nil {
		return pyError(err)
	}
	defer pye.Decref()

	if pyargs, err = c.CreatePyArgs(c.args); err != nil {
		return pyError(err)
	}
	defer pyargs.Decref()

	init := util.Prof.Enter("tc.init")
	if obj, err = c.inner.Base().CallFunctionObjArgs(pyv); err != nil {
		return pyError(err)
	}
	defer obj.Decref()
	init.Exit()
	exec := util.Prof.Enter("tc.exec")
	defer exec.Exit()
	if obj.Base().HasAttrString("run_") {
		// The plugin is probably trying to bypass the undostack...
		old := v.IsScratch()
		v.SetScratch(true)
		log.Finest("Discarded: %s", e)
		v.EndEdit(e)
		v.SetScratch(old)
		ret, err := obj.Base().CallMethodObjArgs("run_", pye, pyargs)
		if ret != nil {
			ret.Decref()
		}
		if err != nil {
			return pyError(err)
		}
		return nil
	}
	ret, err := obj.Base().CallMethodObjArgs("run__", pye, pyargs)
	if ret != nil {
		ret.Decref()
	}
	if err != nil {
		return pyError(err)
	}
	return nil
}

func (c *WindowCommandGlue) Run(w *lime.Window) error {
	l := py.NewLock()
	defer l.Unlock()

	var (
		pyw, pyargs, obj py.Object
		err              error
	)
	log.Debug("WindowCommand: %v", c.args)
	if pyw, err = toPython(w); err != nil {
		return pyError(err)
	}
	defer pyw.Decref()

	if pyargs, err = c.CreatePyArgs(c.args); err != nil {
		return pyError(err)
	}
	defer pyargs.Decref()

	if obj, err = c.inner.Base().CallFunctionObjArgs(pyw); err != nil {
		return pyError(err)
	}
	defer obj.Decref()
	if ret, err := obj.Base().CallMethodObjArgs("run_", pyargs); err != nil {
		return pyError(err)
	} else {
		ret.Decref()
	}
	return nil
}

func (c *ApplicationCommandGlue) Run() error {
	l := py.NewLock()
	defer l.Unlock()

	var (
		pyargs py.Object
		err    error
	)
	if pyargs, err = c.CreatePyArgs(c.args); err != nil {
		return pyError(err)
	}
	defer pyargs.Decref()

	obj, err := c.inner.Base().CallFunctionObjArgs()
	if err != nil {
		return pyError(err)
	}
	defer obj.Decref()
	if ret, err := obj.Base().CallMethodObjArgs("run", pyargs); err != nil {
		return pyError(err)
	} else {
		ret.Decref()
	}
	return nil
}

func (c *ApplicationCommandGlue) IsChecked(args lime.Args) bool {
	return c.callBool("is_checked", args)
}