[ui] add string <--> file representation convertors

* convenient methods to conform strings to Qt file reprensentation using the "file:/" protocol prefix
* use those methodes when manipulating files

meshroom/ui/qml/GraphEditor/AttributeEditor.qml

@@ -2,6 +2,7 @@ import QtQuick 2.9
 import QtQuick.Layouts 1.3
 import QtQuick.Controls 2.2
 import MaterialIcons 2.2
+import Utils 1.0
 
 /**
   A component to display and edit a Node's attributes.
@@ -43,7 +44,7 @@ ColumnLayout {
             id: settingsMenu
             MenuItem {
                 text: "Open Cache Folder"
-                onClicked: Qt.openUrlExternally("file://" + node.internalFolder)
+                onClicked: Qt.openUrlExternally(Filepath.stringToFile(node.internalFolder))
                 ToolTip.text: node.internalFolder
                 ToolTip.visible: hovered
                 ToolTip.delay: 500

meshroom/ui/qml/GraphEditor/AttributeItemDelegate.qml

@@ -108,7 +108,7 @@ RowLayout {
             _reconstruction.setAttribute(root.attribute, Number(value))
             break;
         case "File":
-            _reconstruction.setAttribute(root.attribute, value.replace("file://", "").trim())
+            _reconstruction.setAttribute(root.attribute, Filepath.fileToString(value.trim()))
             break;
         default:
             _reconstruction.setAttribute(root.attribute, value.trim())

meshroom/ui/qml/GraphEditor/NodeLog.qml

@@ -3,6 +3,8 @@ import QtQuick.Controls 2.3
 import QtQuick.Controls 1.4 as Controls1 // SplitView
 import QtQuick.Layouts 1.3
 import MaterialIcons 2.2
+import Utils 1.0
+
 import "common.js" as Common
 
 /**
@@ -195,7 +197,7 @@ FocusScope {
     function loadCurrentFile(keepCursorPosition)
     {
         var xhr = new XMLHttpRequest;
-        xhr.open("GET", fileSelector.currentFile);
+        xhr.open("GET", Filepath.stringToFile(fileSelector.currentFile));
         xhr.onreadystatechange = function() {
             if(xhr.readyState == XMLHttpRequest.HEADERS_RECEIVED)
             {

meshroom/ui/qml/ImageDelegate.qml

@@ -68,7 +68,7 @@ Item {
                 Image {
                     anchors.fill: parent
                     anchors.margins: 4
-                    source: imageDelegate.source
+                    source: Filepath.stringToFile(imageDelegate.source)
                     sourceSize: Qt.size(100, 100)
                     asynchronous: true
                     autoTransform: true

meshroom/ui/qml/Utils/filepath.js

@@ -22,3 +22,29 @@ function extension(path) {
 function isFile(path) {
     return extension(path) !== ""
 }
+
+/// Conform 'path' to the Qt file representation relying on "file:" protocol prefix
+function stringToFile(path) {
+    // already containing the file protocol
+    if(path.startsWith("file:"))
+        return path
+    // network path
+    if(path.startsWith("//"))
+        return "file:" + path
+    // assumed local path
+    if(path.trim() == "")
+        return ""
+    return "file:/" + path
+}
+
+/// Remove any "file:" protocol prefix from 'path'
+function fileToString(path)
+{
+    // local path
+    if(path.startsWith("file:///"))
+        return path.replace("file:///", "")
+    // network path
+    else if(path.startsWith("file://"))
+        return path.replace("file://", "")
+    return path
+}

meshroom/ui/qml/Viewer/Viewer2D.qml

@@ -2,12 +2,13 @@ import QtQuick 2.7
 import QtQuick.Controls 2.0
 import QtQuick.Layouts 1.3
 import MaterialIcons 2.2
+import Utils 1.0
 
 FocusScope {
     id: root
 
     clip: true
-    property alias source: image.source
+    property string source
     property var metadata
 
     // slots
@@ -48,6 +49,7 @@ FocusScope {
         fillMode: Image.PreserveAspectFit
         autoTransform: true
         onWidthChanged: if(status==Image.Ready) fit()
+        source: Filepath.stringToFile(root.source)
         onStatusChanged: {
             // update cache source when image is loaded
             if(status === Image.Ready)

meshroom/ui/qml/WorkspaceView.qml

@@ -31,6 +31,7 @@ Item {
     // Load a 3D media file in the 3D viewer
     function load3DMedia(filepath)
     {
+        filepath = Filepath.stringToFile(filepath)
         if(Filepath.extension(filepath) === ".abc")
         {
             viewer3D.abcSource = filepath
@@ -154,7 +155,7 @@ Item {
                 anchors.bottomMargin: 10
                 anchors.horizontalCenter: parent.horizontalCenter
                 visible: meshFile != '' && (viewer3D.source != meshFile)
-                onClicked: viewer3D.source = meshFile
+                onClicked: load3DMedia(meshFile)
             }
         }
     }