[sysprof/wip/chergert/sysprof-3] libsysprof-ui: start on launch UI



commit a67f68c7bca7288f28cef9fd2a9782199e82089b
Author: Christian Hergert <chergert redhat com>
Date:   Sat May 18 12:12:19 2019 -0700

    libsysprof-ui: start on launch UI

 src/libsysprof-ui/libsysprof-ui.gresource.xml      |   1 +
 src/libsysprof-ui/meson.build                      |   4 +
 src/libsysprof-ui/sysprof-environ-editor-row.c     | 278 +++++++++++++++
 src/libsysprof-ui/sysprof-environ-editor-row.h     |  38 +++
 src/libsysprof-ui/sysprof-environ-editor.c         | 318 +++++++++++++++++
 src/libsysprof-ui/sysprof-environ-editor.h         |  38 +++
 src/libsysprof-ui/sysprof-environ-variable.c       | 185 ++++++++++
 src/libsysprof-ui/sysprof-environ-variable.h       |  40 +++
 src/libsysprof-ui/sysprof-environ.c                | 377 +++++++++++++++++++++
 src/libsysprof-ui/sysprof-environ.h                |  52 +++
 src/libsysprof-ui/sysprof-profiler-assistant.c     |  32 ++
 src/libsysprof-ui/ui/sysprof-environ-editor-row.ui |  49 +++
 src/libsysprof-ui/ui/sysprof-profiler-assistant.ui | 125 ++++---
 13 files changed, 1492 insertions(+), 45 deletions(-)
---
diff --git a/src/libsysprof-ui/libsysprof-ui.gresource.xml b/src/libsysprof-ui/libsysprof-ui.gresource.xml
index 3e3df45..9584917 100644
--- a/src/libsysprof-ui/libsysprof-ui.gresource.xml
+++ b/src/libsysprof-ui/libsysprof-ui.gresource.xml
@@ -14,6 +14,7 @@
     <file preprocess="xml-stripblanks">ui/sysprof-display.ui</file>
     <file preprocess="xml-stripblanks">ui/sysprof-details-view.ui</file>
     <file preprocess="xml-stripblanks">ui/sysprof-empty-state-view.ui</file>
+    <file preprocess="xml-stripblanks">ui/sysprof-environ-editor-row.ui</file>
     <file preprocess="xml-stripblanks">ui/sysprof-failed-state-view.ui</file>
     <file preprocess="xml-stripblanks">ui/sysprof-marks-view.ui</file>
     <file preprocess="xml-stripblanks">ui/sysprof-process-model-row.ui</file>
diff --git a/src/libsysprof-ui/meson.build b/src/libsysprof-ui/meson.build
index f64f7a3..ddafd97 100644
--- a/src/libsysprof-ui/meson.build
+++ b/src/libsysprof-ui/meson.build
@@ -30,6 +30,10 @@ libsysprof_ui_private_sources = [
   'sysprof-cairo.c',
   'sysprof-cell-renderer-duration.c',
   'sysprof-cell-renderer-percent.c',
+  'sysprof-environ-editor-row.c',
+  'sysprof-environ-editor.c',
+  'sysprof-environ-variable.c',
+  'sysprof-environ.c',
   'sysprof-tab.c',
   'sysprof-theme-manager.c',
   '../stackstash.c',
diff --git a/src/libsysprof-ui/sysprof-environ-editor-row.c b/src/libsysprof-ui/sysprof-environ-editor-row.c
new file mode 100644
index 0000000..d1ab100
--- /dev/null
+++ b/src/libsysprof-ui/sysprof-environ-editor-row.c
@@ -0,0 +1,278 @@
+/* sysprof-environ-editor-row.c
+ *
+ * Copyright 2016-2019 Christian Hergert <christian hergert me>
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#define G_LOG_DOMAIN "sysprof-environ-editor-row"
+
+#include "config.h"
+
+#include "sysprof-environ-editor-row.h"
+
+struct _SysprofEnvironEditorRow
+{
+  GtkListBoxRow           parent_instance;
+
+  SysprofEnvironVariable *variable;
+
+  GtkEntry               *key_entry;
+  GtkEntry               *value_entry;
+  GtkButton              *delete_button;
+
+  GBinding               *key_binding;
+  GBinding               *value_binding;
+};
+
+enum {
+  PROP_0,
+  PROP_VARIABLE,
+  LAST_PROP
+};
+
+enum {
+  DELETE,
+  LAST_SIGNAL
+};
+
+G_DEFINE_TYPE (SysprofEnvironEditorRow, sysprof_environ_editor_row, GTK_TYPE_LIST_BOX_ROW)
+
+static GParamSpec *properties [LAST_PROP];
+static guint signals [LAST_SIGNAL];
+
+static gboolean
+null_safe_mapping (GBinding     *binding,
+                   const GValue *from_value,
+                   GValue       *to_value,
+                   gpointer      user_data)
+{
+  const gchar *str = g_value_get_string (from_value);
+  g_value_set_string (to_value, str ?: "");
+  return TRUE;
+}
+
+static void
+sysprof_environ_editor_row_connect (SysprofEnvironEditorRow *self)
+{
+  g_assert (SYSPROF_IS_ENVIRON_EDITOR_ROW (self));
+  g_assert (SYSPROF_IS_ENVIRON_VARIABLE (self->variable));
+
+  self->key_binding =
+    g_object_bind_property_full (self->variable, "key", self->key_entry, "text",
+                                 G_BINDING_SYNC_CREATE | G_BINDING_BIDIRECTIONAL,
+                                 null_safe_mapping, NULL, NULL, NULL);
+
+  self->value_binding =
+    g_object_bind_property_full (self->variable, "value", self->value_entry, "text",
+                                 G_BINDING_SYNC_CREATE | G_BINDING_BIDIRECTIONAL,
+                                 null_safe_mapping, NULL, NULL, NULL);
+}
+
+static void
+sysprof_environ_editor_row_disconnect (SysprofEnvironEditorRow *self)
+{
+  g_assert (SYSPROF_IS_ENVIRON_EDITOR_ROW (self));
+  g_assert (SYSPROF_IS_ENVIRON_VARIABLE (self->variable));
+
+  g_clear_pointer (&self->key_binding, g_binding_unbind);
+  g_clear_pointer (&self->value_binding, g_binding_unbind);
+}
+
+static void
+delete_button_clicked (GtkButton               *button,
+                       SysprofEnvironEditorRow *self)
+{
+  g_assert (GTK_IS_BUTTON (button));
+  g_assert (SYSPROF_IS_ENVIRON_EDITOR_ROW (self));
+
+  g_signal_emit (self, signals [DELETE], 0);
+}
+
+static void
+key_entry_activate (GtkWidget               *entry,
+                    SysprofEnvironEditorRow *self)
+{
+  g_assert (GTK_IS_ENTRY (entry));
+  g_assert (SYSPROF_IS_ENVIRON_EDITOR_ROW (self));
+
+  gtk_widget_grab_focus (GTK_WIDGET (self->value_entry));
+}
+
+static void
+value_entry_activate (GtkWidget               *entry,
+                      SysprofEnvironEditorRow *self)
+{
+  GtkWidget *parent;
+
+  g_assert (GTK_IS_ENTRY (entry));
+  g_assert (SYSPROF_IS_ENVIRON_EDITOR_ROW (self));
+
+  gtk_widget_grab_focus (GTK_WIDGET (self));
+  parent = gtk_widget_get_ancestor (GTK_WIDGET (self), GTK_TYPE_LIST_BOX);
+  g_signal_emit_by_name (parent, "move-cursor", GTK_MOVEMENT_DISPLAY_LINES, 1);
+}
+
+static void
+sysprof_environ_editor_row_destroy (GtkWidget *widget)
+{
+  SysprofEnvironEditorRow *self = (SysprofEnvironEditorRow *)widget;
+
+  if (self->variable != NULL)
+    {
+      sysprof_environ_editor_row_disconnect (self);
+      g_clear_object (&self->variable);
+    }
+
+  GTK_WIDGET_CLASS (sysprof_environ_editor_row_parent_class)->destroy (widget);
+}
+
+static void
+sysprof_environ_editor_row_get_property (GObject    *object,
+                                         guint       prop_id,
+                                         GValue     *value,
+                                         GParamSpec *pspec)
+{
+  SysprofEnvironEditorRow *self = SYSPROF_ENVIRON_EDITOR_ROW (object);
+
+  switch (prop_id)
+    {
+    case PROP_VARIABLE:
+      g_value_set_object (value, sysprof_environ_editor_row_get_variable (self));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+sysprof_environ_editor_row_set_property (GObject      *object,
+                                         guint         prop_id,
+                                         const GValue *value,
+                                         GParamSpec   *pspec)
+{
+  SysprofEnvironEditorRow *self = SYSPROF_ENVIRON_EDITOR_ROW (object);
+
+  switch (prop_id)
+    {
+    case PROP_VARIABLE:
+      sysprof_environ_editor_row_set_variable (self, g_value_get_object (value));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+sysprof_environ_editor_row_class_init (SysprofEnvironEditorRowClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+  object_class->get_property = sysprof_environ_editor_row_get_property;
+  object_class->set_property = sysprof_environ_editor_row_set_property;
+
+  widget_class->destroy = sysprof_environ_editor_row_destroy;
+
+  gtk_widget_class_set_template_from_resource (widget_class, 
"/org/gnome/sysprof/ui/sysprof-environ-editor-row.ui");
+  gtk_widget_class_bind_template_child (widget_class, SysprofEnvironEditorRow, delete_button);
+  gtk_widget_class_bind_template_child (widget_class, SysprofEnvironEditorRow, key_entry);
+  gtk_widget_class_bind_template_child (widget_class, SysprofEnvironEditorRow, value_entry);
+
+  properties [PROP_VARIABLE] =
+    g_param_spec_object ("variable",
+                         "Variable",
+                         "Variable",
+                         SYSPROF_TYPE_ENVIRON_VARIABLE,
+                         (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+  g_object_class_install_properties (object_class, LAST_PROP, properties);
+
+  signals [DELETE] =
+    g_signal_new ("delete",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_LAST,
+                  0, NULL, NULL, NULL, G_TYPE_NONE, 0);
+}
+
+static void
+sysprof_environ_editor_row_init (SysprofEnvironEditorRow *self)
+{
+  gtk_widget_init_template (GTK_WIDGET (self));
+
+  g_signal_connect (self->delete_button,
+                    "clicked",
+                    G_CALLBACK (delete_button_clicked),
+                    self);
+
+  g_signal_connect (self->key_entry,
+                    "activate",
+                    G_CALLBACK (key_entry_activate),
+                    self);
+
+  g_signal_connect (self->value_entry,
+                    "activate",
+                    G_CALLBACK (value_entry_activate),
+                    self);
+}
+
+/**
+ * sysprof_environ_editor_row_get_variable:
+ *
+ * Returns: (transfer none) (nullable): An #SysprofEnvironVariable.
+ */
+SysprofEnvironVariable *
+sysprof_environ_editor_row_get_variable (SysprofEnvironEditorRow *self)
+{
+  g_return_val_if_fail (SYSPROF_IS_ENVIRON_EDITOR_ROW (self), NULL);
+
+  return self->variable;
+}
+
+void
+sysprof_environ_editor_row_set_variable (SysprofEnvironEditorRow *self,
+                                         SysprofEnvironVariable  *variable)
+{
+  g_return_if_fail (SYSPROF_IS_ENVIRON_EDITOR_ROW (self));
+  g_return_if_fail (!variable || SYSPROF_IS_ENVIRON_VARIABLE (variable));
+
+  if (variable != self->variable)
+    {
+      if (self->variable != NULL)
+        {
+          sysprof_environ_editor_row_disconnect (self);
+          g_clear_object (&self->variable);
+        }
+
+      if (variable != NULL)
+        {
+          self->variable = g_object_ref (variable);
+          sysprof_environ_editor_row_connect (self);
+        }
+
+      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_VARIABLE]);
+    }
+}
+
+void
+sysprof_environ_editor_row_start_editing (SysprofEnvironEditorRow *self)
+{
+  g_return_if_fail (SYSPROF_IS_ENVIRON_EDITOR_ROW (self));
+
+  gtk_widget_grab_focus (GTK_WIDGET (self->key_entry));
+}
diff --git a/src/libsysprof-ui/sysprof-environ-editor-row.h b/src/libsysprof-ui/sysprof-environ-editor-row.h
new file mode 100644
index 0000000..39437e5
--- /dev/null
+++ b/src/libsysprof-ui/sysprof-environ-editor-row.h
@@ -0,0 +1,38 @@
+/* ide-environ-editor-row.h
+ *
+ * Copyright 2016-2019 Christian Hergert <christian hergert me>
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include <gtk/gtk.h>
+
+#include "sysprof-environ-variable.h"
+
+G_BEGIN_DECLS
+
+#define SYSPROF_TYPE_ENVIRON_EDITOR_ROW (sysprof_environ_editor_row_get_type())
+
+G_DECLARE_FINAL_TYPE (SysprofEnvironEditorRow, sysprof_environ_editor_row, SYSPROF, ENVIRON_EDITOR_ROW, 
GtkListBoxRow)
+
+SysprofEnvironVariable *sysprof_environ_editor_row_get_variable  (SysprofEnvironEditorRow *self);
+void                    sysprof_environ_editor_row_set_variable  (SysprofEnvironEditorRow *self,
+                                                                  SysprofEnvironVariable  *variable);
+void                    sysprof_environ_editor_row_start_editing (SysprofEnvironEditorRow *self);
+
+G_END_DECLS
diff --git a/src/libsysprof-ui/sysprof-environ-editor.c b/src/libsysprof-ui/sysprof-environ-editor.c
new file mode 100644
index 0000000..a8538de
--- /dev/null
+++ b/src/libsysprof-ui/sysprof-environ-editor.c
@@ -0,0 +1,318 @@
+/* sysprof-environ-editor.c
+ *
+ * Copyright 2016-2019 Christian Hergert <christian hergert me>
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#define G_LOG_DOMAIN "sysprof-environ-editor"
+
+#include "config.h"
+
+#include <glib/gi18n.h>
+
+#include "sysprof-environ-editor.h"
+#include "sysprof-environ-editor-row.h"
+
+struct _SysprofEnvironEditor
+{
+  GtkListBox              parent_instance;
+  SysprofEnviron         *environ;
+  GtkWidget              *dummy_row;
+  SysprofEnvironVariable *dummy;
+};
+
+G_DEFINE_TYPE (SysprofEnvironEditor, sysprof_environ_editor, GTK_TYPE_LIST_BOX)
+
+enum {
+  PROP_0,
+  PROP_ENVIRON,
+  N_PROPS
+};
+
+static GParamSpec *properties [N_PROPS];
+
+static void
+sysprof_environ_editor_delete_row (SysprofEnvironEditor    *self,
+                                   SysprofEnvironEditorRow *row)
+{
+  SysprofEnvironVariable *variable;
+
+  g_assert (SYSPROF_IS_ENVIRON_EDITOR (self));
+  g_assert (SYSPROF_IS_ENVIRON_EDITOR_ROW (row));
+
+  variable = sysprof_environ_editor_row_get_variable (row);
+  sysprof_environ_remove (self->environ, variable);
+}
+
+static GtkWidget *
+sysprof_environ_editor_create_dummy_row (SysprofEnvironEditor *self)
+{
+  GtkWidget *row;
+  GtkWidget *label;
+
+  g_assert (SYSPROF_IS_ENVIRON_EDITOR (self));
+
+  label = g_object_new (GTK_TYPE_LABEL,
+                        "label", _("New variable…"),
+                        "visible", TRUE,
+                        "xalign", 0.0f,
+                        NULL);
+  gtk_style_context_add_class (gtk_widget_get_style_context (label), "dim-label");
+
+  row = g_object_new (GTK_TYPE_LIST_BOX_ROW,
+                      "child", label,
+                      "visible", TRUE,
+                      NULL);
+
+  return row;
+}
+
+static GtkWidget *
+sysprof_environ_editor_create_row (gpointer item,
+                                   gpointer user_data)
+{
+  SysprofEnvironVariable *variable = item;
+  SysprofEnvironEditor *self = user_data;
+  SysprofEnvironEditorRow *row;
+
+  g_assert (SYSPROF_IS_ENVIRON_EDITOR (self));
+  g_assert (SYSPROF_IS_ENVIRON_VARIABLE (variable));
+
+  row = g_object_new (SYSPROF_TYPE_ENVIRON_EDITOR_ROW,
+                      "variable", variable,
+                      "visible", TRUE,
+                      NULL);
+
+  g_signal_connect_object (row,
+                           "delete",
+                           G_CALLBACK (sysprof_environ_editor_delete_row),
+                           self,
+                           G_CONNECT_SWAPPED);
+
+  return GTK_WIDGET (row);
+}
+
+static void
+sysprof_environ_editor_disconnect (SysprofEnvironEditor *self)
+{
+  g_assert (SYSPROF_IS_ENVIRON_EDITOR (self));
+  g_assert (SYSPROF_IS_ENVIRON (self->environ));
+
+  gtk_list_box_bind_model (GTK_LIST_BOX (self), NULL, NULL, NULL, NULL);
+
+  g_clear_object (&self->dummy);
+}
+
+static void
+sysprof_environ_editor_connect (SysprofEnvironEditor *self)
+{
+  g_assert (SYSPROF_IS_ENVIRON_EDITOR (self));
+  g_assert (SYSPROF_IS_ENVIRON (self->environ));
+
+  gtk_list_box_bind_model (GTK_LIST_BOX (self),
+                           G_LIST_MODEL (self->environ),
+                           sysprof_environ_editor_create_row, self, NULL);
+
+  self->dummy_row = sysprof_environ_editor_create_dummy_row (self);
+  gtk_container_add (GTK_CONTAINER (self), self->dummy_row);
+}
+
+static void
+find_row_cb (GtkWidget *widget,
+             gpointer   data)
+{
+  struct {
+    SysprofEnvironVariable  *variable;
+    SysprofEnvironEditorRow *row;
+  } *lookup = data;
+
+  g_assert (lookup != NULL);
+  g_assert (GTK_IS_LIST_BOX_ROW (widget));
+
+  if (SYSPROF_IS_ENVIRON_EDITOR_ROW (widget))
+    {
+      SysprofEnvironVariable *variable;
+
+      variable = sysprof_environ_editor_row_get_variable (SYSPROF_ENVIRON_EDITOR_ROW (widget));
+
+      if (variable == lookup->variable)
+        lookup->row = SYSPROF_ENVIRON_EDITOR_ROW (widget);
+    }
+}
+
+static SysprofEnvironEditorRow *
+find_row (SysprofEnvironEditor   *self,
+          SysprofEnvironVariable *variable)
+{
+  struct {
+    SysprofEnvironVariable  *variable;
+    SysprofEnvironEditorRow *row;
+  } lookup = { variable, NULL };
+
+  g_assert (SYSPROF_IS_ENVIRON_EDITOR (self));
+  g_assert (SYSPROF_IS_ENVIRON_VARIABLE (variable));
+
+  gtk_container_foreach (GTK_CONTAINER (self), find_row_cb, &lookup);
+
+  return lookup.row;
+}
+
+static void
+sysprof_environ_editor_row_activated (GtkListBox    *list_box,
+                                      GtkListBoxRow *row)
+{
+  SysprofEnvironEditor *self = (SysprofEnvironEditor *)list_box;
+
+  g_assert (GTK_IS_LIST_BOX (list_box));
+  g_assert (GTK_IS_LIST_BOX_ROW (row));
+
+  if (self->environ == NULL)
+    return;
+
+  if (self->dummy_row == GTK_WIDGET (row))
+    {
+      g_autoptr(SysprofEnvironVariable) variable = NULL;
+
+      variable = sysprof_environ_variable_new (NULL, NULL);
+      sysprof_environ_append (self->environ, variable);
+      sysprof_environ_editor_row_start_editing (find_row (self, variable));
+    }
+}
+
+static void
+sysprof_environ_editor_destroy (GtkWidget *widget)
+{
+  SysprofEnvironEditor *self = (SysprofEnvironEditor *)widget;
+
+  GTK_WIDGET_CLASS (sysprof_environ_editor_parent_class)->destroy (widget);
+
+  g_clear_object (&self->environ);
+}
+
+static void
+sysprof_environ_editor_get_property (GObject    *object,
+                                     guint       prop_id,
+                                     GValue     *value,
+                                     GParamSpec *pspec)
+{
+  SysprofEnvironEditor *self = SYSPROF_ENVIRON_EDITOR (object);
+
+  switch (prop_id)
+    {
+    case PROP_ENVIRON:
+      g_value_set_object (value, sysprof_environ_editor_get_environ (self));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
+    }
+}
+
+static void
+sysprof_environ_editor_set_property (GObject      *object,
+                                     guint         prop_id,
+                                     const GValue *value,
+                                     GParamSpec   *pspec)
+{
+  SysprofEnvironEditor *self = SYSPROF_ENVIRON_EDITOR (object);
+
+  switch (prop_id)
+    {
+    case PROP_ENVIRON:
+      sysprof_environ_editor_set_environ (self, g_value_get_object (value));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
+    }
+}
+
+static void
+sysprof_environ_editor_class_init (SysprofEnvironEditorClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+  GtkListBoxClass *list_box_class = GTK_LIST_BOX_CLASS (klass);
+
+  object_class->get_property = sysprof_environ_editor_get_property;
+  object_class->set_property = sysprof_environ_editor_set_property;
+
+  widget_class->destroy = sysprof_environ_editor_destroy;
+
+  list_box_class->row_activated = sysprof_environ_editor_row_activated;
+
+  properties [PROP_ENVIRON] =
+    g_param_spec_object ("environ",
+                         "Environment",
+                         "Environment",
+                         SYSPROF_TYPE_ENVIRON,
+                         (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+  g_object_class_install_properties (object_class, N_PROPS, properties);
+}
+
+static void
+sysprof_environ_editor_init (SysprofEnvironEditor *self)
+{
+  gtk_list_box_set_selection_mode (GTK_LIST_BOX (self), GTK_SELECTION_NONE);
+}
+
+GtkWidget *
+sysprof_environ_editor_new (void)
+{
+  return g_object_new (SYSPROF_TYPE_ENVIRON_EDITOR, NULL);
+}
+
+void
+sysprof_environ_editor_set_environ (SysprofEnvironEditor *self,
+                                    SysprofEnviron       *environ)
+{
+  g_return_if_fail (SYSPROF_IS_ENVIRON_EDITOR (self));
+  g_return_if_fail (SYSPROF_IS_ENVIRON (environ));
+
+  if (self->environ != environ)
+    {
+      if (self->environ != NULL)
+        {
+          sysprof_environ_editor_disconnect (self);
+          g_clear_object (&self->environ);
+        }
+
+      if (environ != NULL)
+        {
+          self->environ = g_object_ref (environ);
+          sysprof_environ_editor_connect (self);
+        }
+
+      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_ENVIRON]);
+    }
+}
+
+/**
+ * sysprof_environ_editor_get_environ:
+ *
+ * Returns: (nullable) (transfer none): An #SysprofEnviron or %NULL.
+ *
+ * Since: 3.34
+ */
+SysprofEnviron *
+sysprof_environ_editor_get_environ (SysprofEnvironEditor *self)
+{
+  g_return_val_if_fail (SYSPROF_IS_ENVIRON_EDITOR (self), NULL);
+
+  return self->environ;
+}
diff --git a/src/libsysprof-ui/sysprof-environ-editor.h b/src/libsysprof-ui/sysprof-environ-editor.h
new file mode 100644
index 0000000..fe4239a
--- /dev/null
+++ b/src/libsysprof-ui/sysprof-environ-editor.h
@@ -0,0 +1,38 @@
+/* sysprof-environ-editor.h
+ *
+ * Copyright 2016-2019 Christian Hergert <christian hergert me>
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include <gtk/gtk.h>
+
+#include "sysprof-environ.h"
+
+G_BEGIN_DECLS
+
+#define SYSPROF_TYPE_ENVIRON_EDITOR (sysprof_environ_editor_get_type())
+
+G_DECLARE_FINAL_TYPE (SysprofEnvironEditor, sysprof_environ_editor, SYSPROF, ENVIRON_EDITOR, GtkListBox)
+
+GtkWidget      *sysprof_environ_editor_new         (void);
+SysprofEnviron *sysprof_environ_editor_get_environ (SysprofEnvironEditor *self);
+void            sysprof_environ_editor_set_environ (SysprofEnvironEditor *self,
+                                                        SysprofEnviron       *environ);
+
+G_END_DECLS
diff --git a/src/libsysprof-ui/sysprof-environ-variable.c b/src/libsysprof-ui/sysprof-environ-variable.c
new file mode 100644
index 0000000..660b345
--- /dev/null
+++ b/src/libsysprof-ui/sysprof-environ-variable.c
@@ -0,0 +1,185 @@
+/* sysprof-environ-variable.c
+ *
+ * Copyright 2016-2019 Christian Hergert <christian hergert me>
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#define G_LOG_DOMAIN "sysprof-environ-variable"
+
+#include "config.h"
+
+#include "sysprof-environ-variable.h"
+
+struct _SysprofEnvironVariable
+{
+  GObject  parent_instance;
+  gchar   *key;
+  gchar   *value;
+};
+
+G_DEFINE_TYPE (SysprofEnvironVariable, sysprof_environ_variable, G_TYPE_OBJECT)
+
+enum {
+  PROP_0,
+  PROP_KEY,
+  PROP_VALUE,
+  LAST_PROP
+};
+
+static GParamSpec *properties [LAST_PROP];
+
+static void
+sysprof_environ_variable_finalize (GObject *object)
+{
+  SysprofEnvironVariable *self = (SysprofEnvironVariable *)object;
+
+  g_clear_pointer (&self->key, g_free);
+  g_clear_pointer (&self->value, g_free);
+
+  G_OBJECT_CLASS (sysprof_environ_variable_parent_class)->finalize (object);
+}
+
+static void
+sysprof_environ_variable_get_property (GObject    *object,
+                                       guint       prop_id,
+                                       GValue     *value,
+                                       GParamSpec *pspec)
+{
+  SysprofEnvironVariable *self = SYSPROF_ENVIRON_VARIABLE(object);
+
+  switch (prop_id)
+    {
+    case PROP_KEY:
+      g_value_set_string (value, self->key);
+      break;
+
+    case PROP_VALUE:
+      g_value_set_string (value, self->value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
+    }
+}
+
+static void
+sysprof_environ_variable_set_property (GObject      *object,
+                                       guint         prop_id,
+                                       const GValue *value,
+                                       GParamSpec   *pspec)
+{
+  SysprofEnvironVariable *self = SYSPROF_ENVIRON_VARIABLE(object);
+
+  switch (prop_id)
+    {
+    case PROP_KEY:
+      sysprof_environ_variable_set_key (self, g_value_get_string (value));
+      break;
+
+    case PROP_VALUE:
+      sysprof_environ_variable_set_value (self, g_value_get_string (value));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
+    }
+}
+
+static void
+sysprof_environ_variable_class_init (SysprofEnvironVariableClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = sysprof_environ_variable_finalize;
+  object_class->get_property = sysprof_environ_variable_get_property;
+  object_class->set_property = sysprof_environ_variable_set_property;
+
+  properties [PROP_KEY] =
+    g_param_spec_string ("key",
+                         "Key",
+                         "The key for the environment variable",
+                         NULL,
+                         (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+  properties [PROP_VALUE] =
+    g_param_spec_string ("value",
+                         "Value",
+                         "The value for the environment variable",
+                         NULL,
+                         (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+  g_object_class_install_properties (object_class, LAST_PROP, properties);
+}
+
+static void
+sysprof_environ_variable_init (SysprofEnvironVariable *self)
+{
+}
+
+const gchar *
+sysprof_environ_variable_get_key (SysprofEnvironVariable *self)
+{
+  g_return_val_if_fail (SYSPROF_IS_ENVIRON_VARIABLE (self), NULL);
+
+  return self->key;
+}
+
+void
+sysprof_environ_variable_set_key (SysprofEnvironVariable *self,
+                                  const gchar            *key)
+{
+  g_return_if_fail (SYSPROF_IS_ENVIRON_VARIABLE (self));
+
+  if (g_strcmp0 (key, self->key) != 0)
+    {
+      g_free (self->key);
+      self->key = g_strdup (key);
+      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_KEY]);
+    }
+}
+
+const gchar *
+sysprof_environ_variable_get_value (SysprofEnvironVariable *self)
+{
+  g_return_val_if_fail (SYSPROF_IS_ENVIRON_VARIABLE (self), NULL);
+
+  return self->value;
+}
+
+void
+sysprof_environ_variable_set_value (SysprofEnvironVariable *self,
+                                    const gchar            *value)
+{
+  g_return_if_fail (SYSPROF_IS_ENVIRON_VARIABLE (self));
+
+  if (g_strcmp0 (value, self->value) != 0)
+    {
+      g_free (self->value);
+      self->value = g_strdup (value);
+      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_VALUE]);
+    }
+}
+
+SysprofEnvironVariable *
+sysprof_environ_variable_new (const gchar *key,
+                              const gchar *value)
+{
+  return g_object_new (SYSPROF_TYPE_ENVIRON_VARIABLE,
+                       "key", key,
+                       "value", value,
+                       NULL);
+}
diff --git a/src/libsysprof-ui/sysprof-environ-variable.h b/src/libsysprof-ui/sysprof-environ-variable.h
new file mode 100644
index 0000000..ee19876
--- /dev/null
+++ b/src/libsysprof-ui/sysprof-environ-variable.h
@@ -0,0 +1,40 @@
+/* sysprof-environ-variable.h
+ *
+ * Copyright 2016-2019 Christian Hergert <christian hergert me>
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define SYSPROF_TYPE_ENVIRON_VARIABLE (sysprof_environ_variable_get_type())
+
+G_DECLARE_FINAL_TYPE (SysprofEnvironVariable, sysprof_environ_variable, SYSPROF, ENVIRON_VARIABLE, GObject)
+
+SysprofEnvironVariable *sysprof_environ_variable_new       (const gchar            *key,
+                                                            const gchar            *value);
+const gchar            *sysprof_environ_variable_get_key   (SysprofEnvironVariable *self);
+void                    sysprof_environ_variable_set_key   (SysprofEnvironVariable *self,
+                                                            const gchar            *key);
+const gchar            *sysprof_environ_variable_get_value (SysprofEnvironVariable *self);
+void                    sysprof_environ_variable_set_value (SysprofEnvironVariable *self,
+                                                            const gchar            *value);
+
+G_END_DECLS
diff --git a/src/libsysprof-ui/sysprof-environ.c b/src/libsysprof-ui/sysprof-environ.c
new file mode 100644
index 0000000..a87eeb1
--- /dev/null
+++ b/src/libsysprof-ui/sysprof-environ.c
@@ -0,0 +1,377 @@
+/* sysprof-environ.c
+ *
+ * Copyright 2016-2019 Christian Hergert <christian hergert me>
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#define G_LOG_DOMAIN "sysprof-environ"
+
+#include "config.h"
+
+#include "sysprof-environ.h"
+#include "sysprof-environ-variable.h"
+
+struct _SysprofEnviron
+{
+  GObject    parent_instance;
+  GPtrArray *variables;
+};
+
+static void list_model_iface_init (GListModelInterface *iface);
+
+G_DEFINE_TYPE_EXTENDED (SysprofEnviron, sysprof_environ, G_TYPE_OBJECT, 0,
+                        G_IMPLEMENT_INTERFACE (G_TYPE_LIST_MODEL, list_model_iface_init))
+
+enum {
+  CHANGED,
+  LAST_SIGNAL
+};
+
+static guint signals [LAST_SIGNAL];
+
+static void
+sysprof_environ_finalize (GObject *object)
+{
+  SysprofEnviron *self = (SysprofEnviron *)object;
+
+  g_clear_pointer (&self->variables, g_ptr_array_unref);
+
+  G_OBJECT_CLASS (sysprof_environ_parent_class)->finalize (object);
+}
+
+static void
+sysprof_environ_class_init (SysprofEnvironClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = sysprof_environ_finalize;
+
+  signals [CHANGED] =
+    g_signal_new ("changed",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_LAST,
+                  0, NULL, NULL,
+                  g_cclosure_marshal_VOID__VOID,
+                  G_TYPE_NONE, 0);
+  g_signal_set_va_marshaller (signals [CHANGED],
+                              G_TYPE_FROM_CLASS (klass),
+                              g_cclosure_marshal_VOID__VOIDv);
+}
+
+static void
+sysprof_environ_items_changed (SysprofEnviron *self)
+{
+  g_assert (SYSPROF_IS_ENVIRON (self));
+
+  g_signal_emit (self, signals [CHANGED], 0);
+}
+
+static void
+sysprof_environ_init (SysprofEnviron *self)
+{
+  self->variables = g_ptr_array_new_with_free_func (g_object_unref);
+
+  g_signal_connect (self,
+                    "items-changed",
+                    G_CALLBACK (sysprof_environ_items_changed),
+                    NULL);
+}
+
+static GType
+sysprof_environ_get_item_type (GListModel *model)
+{
+  return SYSPROF_TYPE_ENVIRON_VARIABLE;
+}
+
+static gpointer
+sysprof_environ_get_item (GListModel *model,
+                          guint       position)
+{
+  SysprofEnviron *self = (SysprofEnviron *)model;
+
+  g_return_val_if_fail (SYSPROF_IS_ENVIRON (self), NULL);
+  g_return_val_if_fail (position < self->variables->len, NULL);
+
+  return g_object_ref (g_ptr_array_index (self->variables, position));
+}
+
+static guint
+sysprof_environ_get_n_items (GListModel *model)
+{
+  SysprofEnviron *self = (SysprofEnviron *)model;
+
+  g_return_val_if_fail (SYSPROF_IS_ENVIRON (self), 0);
+
+  return self->variables->len;
+}
+
+static void
+list_model_iface_init (GListModelInterface *iface)
+{
+  iface->get_n_items = sysprof_environ_get_n_items;
+  iface->get_item = sysprof_environ_get_item;
+  iface->get_item_type = sysprof_environ_get_item_type;
+}
+
+static void
+sysprof_environ_variable_notify (SysprofEnviron         *self,
+                                 GParamSpec             *pspec,
+                                 SysprofEnvironVariable *variable)
+{
+  g_assert (SYSPROF_IS_ENVIRON (self));
+
+  g_signal_emit (self, signals [CHANGED], 0);
+}
+
+void
+sysprof_environ_setenv (SysprofEnviron *self,
+                        const gchar    *key,
+                        const gchar    *value)
+{
+  guint i;
+
+  g_return_if_fail (SYSPROF_IS_ENVIRON (self));
+  g_return_if_fail (key != NULL);
+
+  for (i = 0; i < self->variables->len; i++)
+    {
+      SysprofEnvironVariable *var = g_ptr_array_index (self->variables, i);
+      const gchar *var_key = sysprof_environ_variable_get_key (var);
+
+      if (g_strcmp0 (key, var_key) == 0)
+        {
+          if (value == NULL)
+            {
+              g_ptr_array_remove_index (self->variables, i);
+              g_list_model_items_changed (G_LIST_MODEL (self), i, 1, 0);
+              return;
+            }
+
+          sysprof_environ_variable_set_value (var, value);
+          return;
+        }
+    }
+
+  if (value != NULL)
+    {
+      SysprofEnvironVariable *var;
+      guint position = self->variables->len;
+
+      var = g_object_new (SYSPROF_TYPE_ENVIRON_VARIABLE,
+                          "key", key,
+                          "value", value,
+                          NULL);
+      g_signal_connect_object (var,
+                               "notify",
+                               G_CALLBACK (sysprof_environ_variable_notify),
+                               self,
+                               G_CONNECT_SWAPPED);
+      g_ptr_array_add (self->variables, var);
+      g_list_model_items_changed (G_LIST_MODEL (self), position, 0, 1);
+    }
+}
+
+const gchar *
+sysprof_environ_getenv (SysprofEnviron *self,
+                        const gchar    *key)
+{
+  guint i;
+
+  g_return_val_if_fail (SYSPROF_IS_ENVIRON (self), NULL);
+  g_return_val_if_fail (key != NULL, NULL);
+
+  for (i = 0; i < self->variables->len; i++)
+    {
+      SysprofEnvironVariable *var = g_ptr_array_index (self->variables, i);
+      const gchar *var_key = sysprof_environ_variable_get_key (var);
+
+      if (g_strcmp0 (key, var_key) == 0)
+        return sysprof_environ_variable_get_value (var);
+    }
+
+  return NULL;
+}
+
+/**
+ * sysprof_environ_get_environ:
+ * @self: An #SysprofEnviron
+ *
+ * Gets the environment as a set of key=value pairs, suitable for use
+ * in various GLib process functions.
+ *
+ * Returns: (transfer full): A newly allocated string array.
+ *
+ * Since: 3.32
+ */
+gchar **
+sysprof_environ_get_environ (SysprofEnviron *self)
+{
+  GPtrArray *ar;
+  guint i;
+
+  g_return_val_if_fail (SYSPROF_IS_ENVIRON (self), NULL);
+
+  ar = g_ptr_array_new ();
+
+  for (i = 0; i < self->variables->len; i++)
+    {
+      SysprofEnvironVariable *var = g_ptr_array_index (self->variables, i);
+      const gchar *key = sysprof_environ_variable_get_key (var);
+      const gchar *value = sysprof_environ_variable_get_value (var);
+
+      if (value == NULL)
+        value = "";
+
+      if (key != NULL)
+        g_ptr_array_add (ar, g_strdup_printf ("%s=%s", key, value));
+    }
+
+  g_ptr_array_add (ar, NULL);
+
+  return (gchar **)g_ptr_array_free (ar, FALSE);
+}
+
+SysprofEnviron *
+sysprof_environ_new (void)
+{
+  return g_object_new (SYSPROF_TYPE_ENVIRON, NULL);
+}
+
+void
+sysprof_environ_remove (SysprofEnviron         *self,
+                        SysprofEnvironVariable *variable)
+{
+  guint i;
+
+  g_return_if_fail (SYSPROF_IS_ENVIRON (self));
+  g_return_if_fail (SYSPROF_IS_ENVIRON_VARIABLE (variable));
+
+  for (i = 0; i < self->variables->len; i++)
+    {
+      SysprofEnvironVariable *item = g_ptr_array_index (self->variables, i);
+
+      if (item == variable)
+        {
+          g_ptr_array_remove_index (self->variables, i);
+          g_list_model_items_changed (G_LIST_MODEL (self), i, 1, 0);
+          break;
+        }
+    }
+}
+
+void
+sysprof_environ_append (SysprofEnviron         *self,
+                        SysprofEnvironVariable *variable)
+{
+  guint position;
+
+  g_return_if_fail (SYSPROF_IS_ENVIRON (self));
+  g_return_if_fail (SYSPROF_IS_ENVIRON_VARIABLE (variable));
+
+  position = self->variables->len;
+
+  g_signal_connect_object (variable,
+                           "notify",
+                           G_CALLBACK (sysprof_environ_variable_notify),
+                           self,
+                           G_CONNECT_SWAPPED);
+  g_ptr_array_add (self->variables, g_object_ref (variable));
+  g_list_model_items_changed (G_LIST_MODEL (self), position, 0, 1);
+}
+
+/**
+ * sysprof_environ_copy:
+ * @self: An #SysprofEnviron
+ *
+ * Copies the contents of #SysprofEnviron into a newly allocated #SysprofEnviron.
+ *
+ * Returns: (transfer full): An #SysprofEnviron.
+ *
+ * Since: 3.32
+ */
+SysprofEnviron *
+sysprof_environ_copy (SysprofEnviron *self)
+{
+  g_autoptr(SysprofEnviron) copy = NULL;
+
+  g_return_val_if_fail (SYSPROF_IS_ENVIRON (self), NULL);
+
+  copy = sysprof_environ_new ();
+  sysprof_environ_copy_into (self, copy, TRUE);
+
+  return g_steal_pointer (&copy);
+}
+
+void
+sysprof_environ_copy_into (SysprofEnviron *self,
+                           SysprofEnviron *dest,
+                           gboolean        replace)
+{
+  g_return_if_fail (SYSPROF_IS_ENVIRON (self));
+  g_return_if_fail (SYSPROF_IS_ENVIRON (dest));
+
+  for (guint i = 0; i < self->variables->len; i++)
+    {
+      SysprofEnvironVariable *var = g_ptr_array_index (self->variables, i);
+      const gchar *key = sysprof_environ_variable_get_key (var);
+      const gchar *value = sysprof_environ_variable_get_value (var);
+
+      if (replace || sysprof_environ_getenv (dest, key) == NULL)
+        sysprof_environ_setenv (dest, key, value);
+    }
+}
+
+/**
+ * ide_environ_parse:
+ * @pair: the KEY=VALUE pair
+ * @key: (out) (optional): a location for a @key
+ * @value: (out) (optional): a location for a @value
+ *
+ * Parses a KEY=VALUE style key-pair into @key and @value.
+ *
+ * Returns: %TRUE if @pair was successfully parsed
+ *
+ * Since: 3.32
+ */
+gboolean
+ide_environ_parse (const gchar  *pair,
+                   gchar       **key,
+                   gchar       **value)
+{
+  const gchar *eq;
+
+  g_return_val_if_fail (pair != NULL, FALSE);
+
+  if (key != NULL)
+    *key = NULL;
+
+  if (value != NULL)
+    *value = NULL;
+
+  if ((eq = strchr (pair, '=')))
+    {
+      if (key != NULL)
+        *key = g_strndup (pair, eq - pair);
+
+      if (value != NULL)
+        *value = g_strdup (eq + 1);
+
+      return TRUE;
+    }
+
+  return FALSE;
+}
diff --git a/src/libsysprof-ui/sysprof-environ.h b/src/libsysprof-ui/sysprof-environ.h
new file mode 100644
index 0000000..ef5e5f8
--- /dev/null
+++ b/src/libsysprof-ui/sysprof-environ.h
@@ -0,0 +1,52 @@
+/* sysprof-environ.h
+ *
+ * Copyright 2016-2019 Christian Hergert <christian hergert me>
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include <gio/gio.h>
+
+#include "sysprof-environ-variable.h"
+
+G_BEGIN_DECLS
+
+#define SYSPROF_TYPE_ENVIRON (sysprof_environ_get_type())
+
+G_DECLARE_FINAL_TYPE (SysprofEnviron, sysprof_environ, SYSPROF, ENVIRON, GObject)
+
+gboolean         ide_environ_parse           (const gchar             *pair,
+                                              gchar                  **key,
+                                              gchar                  **value);
+SysprofEnviron  *sysprof_environ_new         (void);
+void             sysprof_environ_setenv      (SysprofEnviron          *self,
+                                              const gchar             *key,
+                                              const gchar             *value);
+const gchar     *sysprof_environ_getenv      (SysprofEnviron          *self,
+                                              const gchar             *key);
+gchar          **sysprof_environ_get_environ (SysprofEnviron          *self);
+void             sysprof_environ_append      (SysprofEnviron          *self,
+                                              SysprofEnvironVariable  *variable);
+void             sysprof_environ_remove      (SysprofEnviron          *self,
+                                              SysprofEnvironVariable  *variable);
+SysprofEnviron  *sysprof_environ_copy        (SysprofEnviron          *self);
+void             sysprof_environ_copy_into   (SysprofEnviron          *self,
+                                              SysprofEnviron          *dest,
+                                              gboolean                 replace);
+
+G_END_DECLS
diff --git a/src/libsysprof-ui/sysprof-profiler-assistant.c b/src/libsysprof-ui/sysprof-profiler-assistant.c
index 79d1c2b..5558b24 100644
--- a/src/libsysprof-ui/sysprof-profiler-assistant.c
+++ b/src/libsysprof-ui/sysprof-profiler-assistant.c
@@ -24,6 +24,7 @@
 
 #include <sysprof.h>
 
+#include "sysprof-environ-editor.h"
 #include "sysprof-profiler-assistant.h"
 #include "sysprof-process-model-row.h"
 
@@ -32,6 +33,7 @@ struct _SysprofProfilerAssistant
   GtkBin       parent_instance;
 
   /* Template Objects */
+  GtkEntry    *command_line;
   GtkRevealer *process_revealer;
   GtkListBox  *process_list_box;
 };
@@ -98,14 +100,38 @@ sysprof_profiler_assistant_row_activated_cb (SysprofProfilerAssistant *self,
                                           !sysprof_process_model_row_get_selected (row));
 }
 
+static void
+sysprof_profiler_assistant_command_line_changed_cb (SysprofProfilerAssistant *self,
+                                                    GtkEntry                 *entry)
+{
+  g_auto(GStrv) argv = NULL;
+  GtkStyleContext *style_context;
+  const gchar *text;
+  gint argc;
+
+  g_assert (SYSPROF_IS_PROFILER_ASSISTANT (self));
+  g_assert (GTK_IS_ENTRY (entry));
+
+  style_context = gtk_widget_get_style_context (GTK_WIDGET (entry));
+  text = gtk_entry_get_text (entry);
+
+  if (text == NULL || text[0] == 0 || g_shell_parse_argv (text, &argc, &argv, NULL))
+    gtk_style_context_remove_class (style_context, GTK_STYLE_CLASS_ERROR);
+  else
+    gtk_style_context_add_class (style_context, GTK_STYLE_CLASS_ERROR);
+}
+
 static void
 sysprof_profiler_assistant_class_init (SysprofProfilerAssistantClass *klass)
 {
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 
   gtk_widget_class_set_template_from_resource (widget_class, 
"/org/gnome/sysprof/ui/sysprof-profiler-assistant.ui");
+  gtk_widget_class_bind_template_child (widget_class, SysprofProfilerAssistant, command_line);
   gtk_widget_class_bind_template_child (widget_class, SysprofProfilerAssistant, process_list_box);
   gtk_widget_class_bind_template_child (widget_class, SysprofProfilerAssistant, process_revealer);
+
+  g_type_ensure (SYSPROF_TYPE_ENVIRON_EDITOR);
 }
 
 static void
@@ -113,6 +139,12 @@ sysprof_profiler_assistant_init (SysprofProfilerAssistant *self)
 {
   gtk_widget_init_template (GTK_WIDGET (self));
 
+  g_signal_connect_object (self->command_line,
+                           "changed",
+                           G_CALLBACK (sysprof_profiler_assistant_command_line_changed_cb),
+                           self,
+                           G_CONNECT_SWAPPED);
+
   g_signal_connect_object (self->process_list_box,
                            "row-activated",
                            G_CALLBACK (sysprof_profiler_assistant_row_activated_cb),
diff --git a/src/libsysprof-ui/ui/sysprof-environ-editor-row.ui 
b/src/libsysprof-ui/ui/sysprof-environ-editor-row.ui
new file mode 100644
index 0000000..56b176a
--- /dev/null
+++ b/src/libsysprof-ui/ui/sysprof-environ-editor-row.ui
@@ -0,0 +1,49 @@
+<interface>
+  <template class="IdeEnvironmentEditorRow" parent="GtkListBoxRow">
+    <child>
+      <object class="GtkBox">
+        <property name="orientation">horizontal</property>
+        <property name="spacing">12</property>
+        <property name="visible">true</property>
+        <child>
+          <object class="GtkEntry" id="key_entry">
+            <property name="has-frame">false</property>
+            <property name="visible">true</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkLabel" id="eq_label">
+            <property name="label">=</property>
+            <property name="visible">true</property>
+            <style>
+              <class name="dim-label"/>
+            </style>
+          </object>
+        </child>
+        <child>
+          <object class="GtkEntry" id="value_entry">
+            <property name="hexpand">true</property>
+            <property name="has-frame">false</property>
+            <property name="visible">true</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="delete_button">
+            <property name="visible">true</property>
+            <property name="tooltip-text" translatable="yes">Remove environment variable</property>
+            <style>
+              <class name="image-button"/>
+              <class name="flat"/>
+            </style>
+            <child>
+              <object class="GtkImage">
+                <property name="icon-name">list-remove-symbolic</property>
+                <property name="visible">true</property>
+              </object>
+            </child>
+          </object>
+        </child>
+      </object>
+    </child>
+  </template>
+</interface>
diff --git a/src/libsysprof-ui/ui/sysprof-profiler-assistant.ui 
b/src/libsysprof-ui/ui/sysprof-profiler-assistant.ui
index d499335..dd2abc5 100644
--- a/src/libsysprof-ui/ui/sysprof-profiler-assistant.ui
+++ b/src/libsysprof-ui/ui/sysprof-profiler-assistant.ui
@@ -45,7 +45,7 @@
                 <property name="visible">true</property>
                 <child>
                   <object class="GtkLabel">
-                    <property name="label" translatable="yes">Enabling this will request that Sysprof 
generate callgraph information for all applications and the operating system kernel. This may not always be 
possible depending on the system configuration.</property>
+                    <property name="label" translatable="yes">Enable to generate callgraph information for 
all applications and the operating system kernel. This may not be possible on some system system 
configurations.</property>
                     <property name="margin-bottom">6</property>
                     <property name="max-width-chars">10</property>
                     <property name="wrap">true</property>
@@ -118,6 +118,7 @@
               <object class="GtkLabel">
                 <property name="label" translatable="yes">Launch Application</property>
                 <property name="xalign">1.0</property>
+                <property name="valign">start</property>
                 <property name="visible">true</property>
                 <style>
                   <class name="dim-label"/>
@@ -129,66 +130,100 @@
               </packing>
             </child>
             <child>
-              <object class="GtkSwitch">
-                <property name="active">false</property>
-                <property name="halign">start</property>
-                <property name="valign">center</property>
-                <property name="visible">true</property>
-              </object>
-              <packing>
-                <property name="column">center</property>
-                <property name="row">2</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkToggleButton">
-                <property name="halign">start</property>
+              <object class="GtkBox">
+                <property name="orientation">vertical</property>
+                <property name="width-request">500</property>
+                <property name="valign">start</property>
                 <property name="visible">true</property>
-                <style>
-                  <class name="image-button"/>
-                </style>
                 <child>
-                  <object class="GtkImage">
-                    <property name="icon-name">view-more-symbolic</property>
+                  <object class="GtkSwitch" id="launch_switch">
+                    <property name="active">false</property>
+                    <property name="halign">start</property>
+                    <property name="valign">center</property>
                     <property name="visible">true</property>
                   </object>
                 </child>
-              </object>
-              <packing>
-                <property name="column">right</property>
-                <property name="row">3</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkBox">
-                <property name="orientation">horizontal</property>
-                <property name="homogeneous">true</property>
-                <property name="width-request">500</property>
-                <property name="visible">true</property>
-                <style>
-                  <class name="linked"/>
-                </style>
                 <child>
-                  <object class="GtkRadioButton" id="whole_system">
-                    <property name="draw-indicator">false</property>
-                    <property name="label" translatable="yes">Existing Process</property>
+                  <object class="GtkLabel">
+                    <property name="label" translatable="yes">Enable to launch a program of your choosing 
before profiling.</property>
+                    <property name="margin-top">6</property>
+                    <property name="margin-bottom">6</property>
+                    <property name="max-width-chars">10</property>
+                    <property name="wrap">true</property>
                     <property name="visible">true</property>
-                    <property name="hexpand">true</property>
+                    <property name="xalign">0.0</property>
+                    <attributes>
+                      <attribute name="scale" value="0.8333"/>
+                    </attributes>
+                    <style>
+                      <class name="dim-label"/>
+                    </style>
                   </object>
                 </child>
                 <child>
-                  <object class="GtkRadioButton" id="by_pid">
-                    <property name="draw-indicator">false</property>
-                    <property name="label" translatable="yes">New Process</property>
-                    <property name="group">whole_system</property>
+                  <object class="GtkRevealer" id="launch_revealer">
+                    <property name="reveal-child" bind-source="launch_switch" bind-property="active" 
bind-flags="sync-create"/>
                     <property name="visible">true</property>
-                    <property name="hexpand">true</property>
+                    <child>
+                      <object class="GtkBox">
+                        <property name="margin-top">6</property>
+                        <property name="spacing">6</property>
+                        <property name="margin-bottom">12</property>
+                        <property name="orientation">vertical</property>
+                        <property name="visible">true</property>
+                        <child>
+                          <object class="GtkLabel">
+                            <property name="label" translatable="yes">Command Line</property>
+                            <property name="xalign">0.0</property>
+                            <property name="visible">true</property>
+                            <attributes>
+                              <attribute name="scale" value="0.8333"/>
+                              <attribute name="weight" value="bold"/>
+                            </attributes>
+                            <style>
+                              <class name="dim-label"/>
+                            </style>
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkEntry" id="command_line">
+                            <property name="visible">true</property>
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkLabel">
+                            <property name="label" translatable="yes">Environment</property>
+                            <property name="xalign">0.0</property>
+                            <property name="visible">true</property>
+                            <attributes>
+                              <attribute name="scale" value="0.8333"/>
+                              <attribute name="weight" value="bold"/>
+                            </attributes>
+                            <style>
+                              <class name="dim-label"/>
+                            </style>
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkScrolledWindow">
+                            <property name="shadow-type">in</property>
+                            <property name="propagate-natural-height">true</property>
+                            <property name="visible">true</property>
+                            <child>
+                              <object class="SysprofEnvironEditor" id="environ_editor">
+                                <property name="visible">true</property>
+                              </object>
+                            </child>
+                          </object>
+                        </child>
+                      </object>
+                    </child>
                   </object>
                 </child>
               </object>
               <packing>
                 <property name="column">center</property>
-                <property name="row">3</property>
+                <property name="row">2</property>
               </packing>
             </child>
             <child>


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