From d10e096b3607c2145694d879ed98aec70421b4f4 Mon Sep 17 00:00:00 2001
From: simeji <simeji.net@gmail.com>
Date: Thu, 5 Jan 2017 00:43:41 +0900
Subject: [PATCH] Add features : scroll to bottom and top

---
 README.md      |  3 +++
 cmd/jid/jid.go |  9 +++++++++
 engine.go      | 18 ++++++++++++++++++
 engine_test.go | 10 ++++++++++
 4 files changed, 40 insertions(+)

diff --git a/README.md b/README.md
index dc044c1..a45db26 100644
--- a/README.md
+++ b/README.md
@@ -108,7 +108,10 @@ jid < file.json
 |`CTRL` + `E`|To the end of the 'Filter'|
 |`CTRL` + `J`|Scroll json buffer 1 line downwards|
 |`CTRL` + `K`|Scroll json buffer 1 line upwards|
+|`CTRL` + `G`|Scroll json buffer to bottom|
+|`CTRL` + `T`|Scroll json buffer to top|
 |`CTRL` + `L`|Change view mode whole json or keys (only object)|
+|`ESC`|Hide a candidate box|
 
 ### Option
 
diff --git a/cmd/jid/jid.go b/cmd/jid/jid.go
index e20ef87..06e7086 100644
--- a/cmd/jid/jid.go
+++ b/cmd/jid/jid.go
@@ -104,8 +104,17 @@ CTRL-J
 CTRL-K
   Scroll json buffer 1 line upwards
 
+CTRL-G
+  Scroll json buffer to bottom
+
+CTRL-T
+  Scroll json buffer to top
+
 CTRL-L
   Change view mode whole json or keys (only object)
 
+ESC
+  Hide a candidate box
+
 `
 }
diff --git a/engine.go b/engine.go
index 767103e..029434a 100644
--- a/engine.go
+++ b/engine.go
@@ -101,9 +101,13 @@ func (e *Engine) Run() EngineResultInterface {
 			e.queryCursorIdx = e.query.Length()
 		}
 
+		bl := len(contents)
 		contents = e.getContents()
 		e.setCandidateData()
 		e.queryConfirm = false
+		if bl != len(contents) {
+			e.contentOffset = 0
+		}
 
 		ta := &TerminalDrawAttributes{
 			Query:           e.query.StringGet(),
@@ -140,6 +144,10 @@ func (e *Engine) Run() EngineResultInterface {
 				e.scrollToAbove()
 			case termbox.KeyCtrlJ:
 				e.scrollToBelow()
+			case termbox.KeyCtrlG:
+				e.scrollToBottom(len(contents))
+			case termbox.KeyCtrlT:
+				e.scrollToTop()
 			case termbox.KeyCtrlL:
 				e.toggleKeymode()
 			case termbox.KeyCtrlU:
@@ -220,11 +228,21 @@ func (e *Engine) deleteLineQuery() {
 func (e *Engine) scrollToBelow() {
 	e.contentOffset++
 }
+
 func (e *Engine) scrollToAbove() {
 	if o := e.contentOffset - 1; o >= 0 {
 		e.contentOffset = o
 	}
 }
+
+func (e *Engine) scrollToBottom(rownum int) {
+	e.contentOffset = rownum - 1
+}
+
+func (e *Engine) scrollToTop() {
+	e.contentOffset = 0
+}
+
 func (e *Engine) toggleKeymode() {
 	e.keymode = !e.keymode
 }
diff --git a/engine_test.go b/engine_test.go
index 9d02acc..9492847 100644
--- a/engine_test.go
+++ b/engine_test.go
@@ -103,6 +103,16 @@ func TestScrollToBelow(t *testing.T) {
 	e.scrollToBelow()
 	assert.Equal(3, e.contentOffset)
 }
+func TestScrollToBottomAndTop(t *testing.T) {
+	var assert = assert.New(t)
+	e := getEngine(`{"named":"go","NameTest":[1,2,3]}`, "")
+
+	e.scrollToBottom(5)
+	assert.Equal(4, e.contentOffset)
+
+	e.scrollToTop()
+	assert.Equal(0, e.contentOffset)
+}
 
 func TestGetContents(t *testing.T) {
 	var assert = assert.New(t)