From 6c269780b2e68077e701e118e6ffc56312036e34 Mon Sep 17 00:00:00 2001
From: "Sebastian J. Wolf" <sebastian@ygriega.de>
Date: Sat, 29 Aug 2020 15:51:48 +0200
Subject: [PATCH] Add web page preview

---
 harbour-fernschreiber.pro         |   1 +
 qml/components/WebPagePreview.qml | 157 ++++++++++++++++++++++++++++++
 qml/pages/ChatPage.qml            |   7 ++
 3 files changed, 165 insertions(+)
 create mode 100644 qml/components/WebPagePreview.qml

diff --git a/harbour-fernschreiber.pro b/harbour-fernschreiber.pro
index 77d3830..febf2d7 100644
--- a/harbour-fernschreiber.pro
+++ b/harbour-fernschreiber.pro
@@ -27,6 +27,7 @@ DISTFILES += qml/harbour-fernschreiber.qml \
     qml/components/DocumentPreview.qml \
     qml/components/ImagePreview.qml \
     qml/components/InReplyToRow.qml \
+    qml/components/WebPagePreview.qml \
     qml/js/functions.js \
     qml/pages/ChatPage.qml \
     qml/pages/CoverPage.qml \
diff --git a/qml/components/WebPagePreview.qml b/qml/components/WebPagePreview.qml
new file mode 100644
index 0000000..b984331
--- /dev/null
+++ b/qml/components/WebPagePreview.qml
@@ -0,0 +1,157 @@
+/*
+    Copyright (C) 2020 Sebastian J. Wolf
+
+    This file is part of Fernschreiber.
+
+    Fernschreiber is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Fernschreiber is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Fernschreiber. If not, see <http://www.gnu.org/licenses/>.
+*/
+import QtQuick 2.5
+import QtGraphicalEffects 1.0
+import Sailfish.Silica 1.0
+import "../components"
+import "../js/twemoji.js" as Emoji
+import "../js/functions.js" as Functions
+
+Column {
+
+    id: webPagePreviewColumn
+
+    property variant webPageData;
+    property variant pictureFileInformation;
+    property bool hasImage: false;
+
+    spacing: Theme.paddingSmall
+
+    Component.onCompleted: {
+        updateWebPage();
+    }
+
+    function updateWebPage() {
+        if (typeof webPageData === "object") {
+            if (typeof webPageData.photo !== "undefined") {
+                hasImage = true;
+                // Check first which size fits best...
+                for (var i = 0; i < webPageData.photo.sizes.length; i++) {
+                    pictureFileInformation = webPageData.photo.sizes[i].photo;
+                    if (webPageData.photo.sizes[i].width >= webPagePreviewColumn.width) {
+                        break;
+                    }
+                }
+            }
+
+            if (pictureFileInformation.local.is_downloading_completed) {
+                singleImage.source = pictureFileInformation.local.path;
+            } else {
+                tdLibWrapper.downloadFile(pictureFileInformation.id);
+            }
+        }
+    }
+
+    Connections {
+        target: tdLibWrapper
+        onFileUpdated: {
+            if (typeof pictureFileInformation !== "undefined" && fileId === pictureFileInformation.id) {
+                if (fileInformation.local.is_downloading_completed) {
+                    pictureFileInformation = fileInformation;
+                    singleImage.source = fileInformation.local.path;
+                }
+            }
+        }
+    }
+
+    Text {
+        id: siteNameText
+
+        width: parent.width
+        text: Emoji.emojify(webPageData.site_name, font.pixelSize)
+        font.pixelSize: Theme.fontSizeExtraSmall
+        font.bold: true
+        color: Theme.secondaryHighlightColor
+        elide: Text.ElideRight
+        maximumLineCount: 1
+        textFormat: Text.StyledText
+        visible: (text !== "")
+    }
+
+    Text {
+        id: titleText
+
+        width: parent.width
+        text: Emoji.emojify(webPageData.title, font.pixelSize)
+        font.pixelSize: Theme.fontSizeExtraSmall
+        font.bold: true
+        color: Theme.primaryColor
+        elide: Text.ElideRight
+        wrapMode: Text.Wrap
+        maximumLineCount: 2
+        textFormat: Text.StyledText
+        visible: (text !== "")
+    }
+
+    Text {
+        id: descriptionText
+
+        width: parent.width
+        text: Emoji.emojify(webPageData.description, font.pixelSize)
+        font.pixelSize: Theme.fontSizeExtraSmall
+        color: Theme.primaryColor
+        elide: Text.ElideRight
+        wrapMode: Text.Wrap
+        maximumLineCount: 3
+        textFormat: Text.StyledText
+        visible: (text !== "")
+    }
+
+    Item {
+        id: webPagePreviewImageItem
+        width: parent.width
+        height: width * 2 / 3
+        visible: hasImage
+
+        Image {
+            id: singleImage
+            width: parent.width - Theme.paddingSmall
+            height: parent.height - Theme.paddingSmall
+            anchors.centerIn: parent
+
+            fillMode: Image.PreserveAspectCrop
+            autoTransform: true
+            asynchronous: true
+            visible: hasImage && status === Image.Ready
+            opacity: hasImage && status === Image.Ready ? 1 : 0
+            Behavior on opacity { NumberAnimation {} }
+            MouseArea {
+                anchors.fill: parent
+                onClicked: {
+                    pageStack.push(Qt.resolvedUrl("../pages/ImagePage.qml"), { "photoData" : webPageData.photo, "pictureFileInformation" : pictureFileInformation });
+                }
+            }
+        }
+
+        Image {
+            id: imageLoadingBackgroundImage
+            source: "../../images/background" + ( Theme.colorScheme ? "-black" : "-white" ) + ".png"
+            anchors {
+                centerIn: parent
+            }
+            width: parent.width - Theme.paddingMedium
+            height: parent.height - Theme.paddingMedium
+            visible: hasImage && singleImage.status !== Image.Ready
+
+            fillMode: Image.PreserveAspectFit
+            opacity: 0.15
+        }
+    }
+
+}
diff --git a/qml/pages/ChatPage.qml b/qml/pages/ChatPage.qml
index b11540b..17a6aa3 100644
--- a/qml/pages/ChatPage.qml
+++ b/qml/pages/ChatPage.qml
@@ -387,6 +387,13 @@ Page {
                                     visible: (text !== "")
                                 }
 
+                                WebPagePreview {
+                                    id: webPagePreview
+                                    webPageData: ( typeof display.content.web_page !== "undefined" ) ? display.content.web_page : ""
+                                    width: parent.width
+                                    visible: typeof display.content.web_page !== "undefined"
+                                }
+
                                 ImagePreview {
                                     id: messageImagePreview
                                     photoData: ( display.content['@type'] === "messagePhoto" ) ?  display.content.photo : ""