Move status info widget to its own widget

It is responsable of processing list items which are given to it, via
signals, and then displaying them on the interface. Making this widget
separate and modular will allow creating more advanced status views that
aren't only HTML-based and that are more intuitive to use.

3 files changed, 182 insertions, 0 deletions

diff --git a/src/widgets/status_info.cpp b/src/widgets/status_info.cpp
new file mode 100644
index 0000000..847aec4
--- /dev/null
+++ b/src/widgets/status_info.cpp
@@ -0,0 +1,82 @@
+#include "status_info.h"
+#include "src/list_item.h"
+#include <QTimer>
+#include <QDebug>
+#include <QCloseEvent>
+
+StatusInfoWidget::StatusInfoWidget(QWidget* parent)
+    : QWidget(parent), ui(new Ui::StatusInfo)
+{
+    ui->setupUi(this);
+
+    worker.moveToThread(&worker_thread);
+    connect(this, &StatusInfoWidget::do_process_item, &worker, &StatusInfoWidgetWorker::process_item, Qt::QueuedConnection);
+    connect(this, &StatusInfoWidget::do_process_activity, &worker, &StatusInfoWidgetWorker::process_activity, Qt::QueuedConnection);
+    connect(&worker, &StatusInfoWidgetWorker::itemProcessed, this, &StatusInfoWidget::postProcess, Qt::QueuedConnection);
+    worker_thread.start();
+
+    worker.set_text_zone_width(ui->statusInfoText->width());
+}
+
+StatusInfoWidget::~StatusInfoWidget() {
+    worker_thread.quit();
+    worker_thread.wait();
+
+    delete displayed_activity;
+    delete ui;
+}
+
+void StatusInfoWidget::resizeEvent(QResizeEvent* event) {
+    // TODO: probably create a template, define or inline function for this
+    static QTimer* differed_resize = new QTimer(this);
+    if (static bool timer_init_done = false; not timer_init_done) {
+        differed_resize->setTimerType(Qt::CoarseTimer);
+        differed_resize->setSingleShot(true);
+        differed_resize->setInterval(150);
+        connect(differed_resize, &QTimer::timeout, this, [=]() {
+            worker.set_text_zone_width(ui->statusInfoText->width());
+            if (displayed_activity)
+                emit do_process_activity(displayed_activity);
+        });
+    }
+    differed_resize->start();
+    QWidget::resizeEvent(event);
+}
+
+void StatusInfoWidget::show_list_item(StatusListItem* new_item) {
+    qDebug() << "got item" << new_item << "old is" << displayed_item << displayed_activity;
+    if (new_item != displayed_item) {
+        delete displayed_activity; displayed_activity = nullptr;
+        displayed_item = new_item;
+        emit do_process_item(new_item);
+    }
+}
+
+// Update the GUI with the displayed Activity.
+// Has to be done on the GUI thread, no other way in Qt
+void StatusInfoWidget::postProcess(const QString &html, APActivity* activity) {
+    // Make sure to not delete the displayed_activity if we are reprocessing it after a resize event, else you get a crash that requires nasty debugging (don't ask how i found out ;)
+    if (activity != displayed_activity) {
+        // We are doing "double" deletion of old displayed_activity but sometimes that's important when really scrubbing the search results bar very quickly (we sometimes do reach that code and it hopefully helps against memory leaks)
+        if (displayed_activity)
+            delete displayed_activity;
+        displayed_activity = activity;
+    }
+    ui->statusInfoText->setHtml(html);
+}
+
+/*
+ * ----------------
+ * Worker functions. Ran on non-main, non-GUI, thread
+ * ----------------
+ */
+
+void StatusInfoWidgetWorker::process_item(StatusListItem* item) {
+    APActivity* activity = item->get_activity();
+    process_activity(activity);
+}
+
+void StatusInfoWidgetWorker::process_activity(APActivity* activity) {
+    QString html = activity->get_html_render(render_info);
+    emit itemProcessed(html, activity);
+}
diff --git a/src/widgets/status_info.h b/src/widgets/status_info.h
new file mode 100644
index 0000000..988f930
--- /dev/null
+++ b/src/widgets/status_info.h
@@ -0,0 +1,56 @@
+#pragma once
+#include <QWidget>
+#include <QLocale>
+#include <QThread>
+#include "./ui_status_info.h"
+#include "src/activitypub/apactivity.h"
+#include "src/activitypub/apbase.h"
+#include "src/list_item.h"
+
+class StatusInfoWidgetWorker : public QObject {
+    Q_OBJECT
+
+public slots:
+    void process_item(StatusListItem* item);
+    void process_activity(APActivity* activity);
+    void set_text_zone_width(int width) {render_info.text_zone_width = width;}
+
+signals:
+    void itemProcessed(const QString &html, APActivity* activity = nullptr);
+
+private:
+    QLocale locale_context;
+    HtmlRenderDetails render_info = {0, &locale_context};
+};
+
+QT_BEGIN_NAMESPACE
+namespace Ui { class StatusInfo; }
+QT_END_NAMESPACE
+
+class StatusInfoWidget : public QWidget {
+    Q_OBJECT
+
+public:
+    StatusInfoWidget(QWidget *parent = nullptr);
+    ~StatusInfoWidget();
+
+    void resizeEvent(QResizeEvent* event);
+
+public slots:
+    void show_list_item(StatusListItem* status); // Call from GUI thread
+    void postProcess(const QString &html, APActivity* activity);
+
+signals:
+    // These signals are called privetely by StatusInfoWidget
+    void do_process_item(StatusListItem* item);
+    void do_process_activity(APActivity* activity);
+
+private:
+    Ui::StatusInfo* ui;
+    QThread worker_thread;
+    StatusInfoWidgetWorker worker;
+
+    // Used for determining if we are dealing with a new list item or not
+    StatusListItem* displayed_item = nullptr;
+    APActivity* displayed_activity = nullptr;
+};
diff --git a/src/widgets/status_info.ui b/src/widgets/status_info.ui
new file mode 100644
index 0000000..b8b2586
--- /dev/null
+++ b/src/widgets/status_info.ui
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>StatusInfo</class>
+ <widget class="QWidget" name="StatusInfo">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QGridLayout" name="gridLayout">
+   <item row="0" column="0">
+    <widget class="QTextEdit" name="statusInfoText">
+     <property name="cursor" stdset="0">
+      <cursorShape>IBeamCursor</cursorShape>
+     </property>
+     <property name="undoRedoEnabled">
+      <bool>false</bool>
+     </property>
+     <property name="readOnly">
+      <bool>true</bool>
+     </property>
+     <property name="html">
+      <string>&lt;!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.0//EN&quot; &quot;http://www.w3.org/TR/REC-html40/strict.dtd&quot;&gt;
+&lt;html&gt;&lt;head&gt;&lt;meta name=&quot;qrichtext&quot; content=&quot;1&quot; /&gt;&lt;style type=&quot;text/css&quot;&gt;
+p, li { white-space: pre-wrap; }
+&lt;/style&gt;&lt;/head&gt;&lt;body style=&quot; font-family:'Noto Sans'; font-size:10pt; font-weight:400; font-style:normal;&quot;&gt;
+&lt;p align=&quot;center&quot; style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-style:italic;&quot;&gt;Select Status to display from list.&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+     </property>
+     <property name="textInteractionFlags">
+      <set>Qt::TextBrowserInteraction</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>