From 0dd49584e26c294e3fb25347969f61bca84afb5f Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Sat, 29 Aug 2015 22:12:49 +0200
Subject: Automatically destroy terminal when killed and display history

Child processes of _MetaTerm_ may be terminated using other ways that the integrated kill command.
Automatic terminal widget destruction in such a event prevents the user from viewing the output of non-interactive applications.
This requires _MetaTerm_ to display the application's output after it was terminated.
This requirement is implemented via the new `HistoryViewer` widget that is instantiated after the terminal widget instance has been destroyed.
---
 src/list/TerminalItem.qml       | 26 ++++++++++++++++++++++++++
 src/ui.qrc                      |  1 +
 src/widget/EmbeddedTerminal.qml | 11 +++++++++++
 src/widget/HistoryViewer.qml    | 33 +++++++++++++++++++++++++++++++++
 4 files changed, 71 insertions(+)
 create mode 100644 src/widget/HistoryViewer.qml

diff --git a/src/list/TerminalItem.qml b/src/list/TerminalItem.qml
index febd116..cfffd86 100644
--- a/src/list/TerminalItem.qml
+++ b/src/list/TerminalItem.qml
@@ -6,6 +6,7 @@ Item {
 	id: item
 
 	property EmbeddedTerminal terminal : null
+	property HistoryViewer    history  : null
 	property int              index    : 0
 
 	signal executed (int index)
@@ -96,12 +97,22 @@ Item {
 			function createTerminal(program) {
 				var terminalComponent   = Qt.createComponent("qrc:/EmbeddedTerminal.qml");
 				var instantiateTerminal = function() {
+					if ( item.history !== null ) {
+						item.history.destroy();
+						item.history = null;
+					}
+
 					item.terminal = terminalComponent.createObject(elementList, {
 						"settings"         : settings,
 						"program"          : program,
 						"workingDirectory" : "$HOME",
 						"focus"            : true
 					});
+					item.terminal.onFinished.connect(function() {
+						var history = item.terminal.history;
+						item.reset();
+						createHistoryViewer(history);
+					});
 				}
 
 				if ( terminalComponent.status === Component.Ready ) {
@@ -111,6 +122,21 @@ Item {
 				}
 			}
 
+			function createHistoryViewer(history) {
+				var historyComponent   = Qt.createComponent("qrc:/HistoryViewer.qml");
+				var instantiateHistory = function() {
+					item.history = historyComponent.createObject(elementList, {
+						"history" : history
+					});
+				}
+
+				if ( historyComponent.status === Component.Ready ) {
+					instantiateHistory();
+				} else {
+					historyComponent.statusChanged.connect(instantiateHistory);
+				}
+			}
+
 			RowLayout {
 				anchors {
 					left:  parent.left
diff --git a/src/ui.qrc b/src/ui.qrc
index 916fb43..32e2c06 100644
--- a/src/ui.qrc
+++ b/src/ui.qrc
@@ -8,6 +8,7 @@
 		<file alias="CommandInput.qml">command/CommandInput.qml</file>
 		<file alias="commands.js">command/commands.js</file>
 		<file alias="EmbeddedTerminal.qml">widget/EmbeddedTerminal.qml</file>
+		<file alias="HistoryViewer.qml">widget/HistoryViewer.qml</file>
 		<file alias="Highlighter.qml">widget/Highlighter.qml</file>
 	</qresource>
 </RCC>
diff --git a/src/widget/EmbeddedTerminal.qml b/src/widget/EmbeddedTerminal.qml
index fa30e23..497bf49 100644
--- a/src/widget/EmbeddedTerminal.qml
+++ b/src/widget/EmbeddedTerminal.qml
@@ -5,11 +5,15 @@ import QtQuick.Layouts 1.1
 Item {
 	id: item
 
+	signal finished
+
 	property string program
 	property string workingDirectory
 
 	property int lines : settings.terminal.initialLines
 
+	property alias history : session.history
+
 	function select()         { highlighter.select()     }
 	function deselect()       { highlighter.deselect()   }
 	function displayOverlay() { overlay.displayBriefly() }
@@ -48,6 +52,8 @@ Item {
 			colorScheme: settings.terminal.colorScheme
 
 			session: QMLTermSession {
+				id: session
+
 				initialWorkingDirectory: item.workingDirectory
 
 				shellProgram: {
@@ -60,6 +66,11 @@ Item {
 
 					return elements;
 				}
+
+				onFinished: {
+					clearScreen();
+					item.finished();
+				}
 			}
 
 			Component.onCompleted: {
diff --git a/src/widget/HistoryViewer.qml b/src/widget/HistoryViewer.qml
new file mode 100644
index 0000000..ca042f4
--- /dev/null
+++ b/src/widget/HistoryViewer.qml
@@ -0,0 +1,33 @@
+import QtQuick 2.0
+import QMLTermWidget 1.0
+import QtQuick.Layouts 1.1
+
+Item {
+	id: item
+
+	property string history
+
+	height: viewer.height
+	width:  parent.width - settings.terminal.frameWidth
+
+	Text {
+		id: viewer
+
+		anchors {
+			left:  parent.left
+			leftMargin: settings.terminal.frameWidth
+			right: parent.right
+		}
+
+		color: settings.item.fontColor
+
+		font {
+			family:    settings.terminal.fontFamily
+			pointSize: settings.terminal.fontSize
+		}
+
+		Layout.fillWidth: true
+
+		text: history.trim()
+	}
+}
-- 
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