[latexila] LaTeX menu: implement util function in liblatexila

[Sébastien Wilmet <swilmet src gnome org>]

commit e6991beb6fb7c9b7b7fc32a1d9bf913a06970144
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Tue Oct 24 20:26:58 2017 +0200

    LaTeX menu: implement util function in liblatexila

 docs/reference/latexila-sections.txt  |    2 +-
 src/latex_menu.vala                   |   69 ++----------------------
 src/liblatexila/latexila-latex-menu.c |   96 ++++++++++++++++++++++++++++++++-
 src/liblatexila/latexila-latex-menu.h |    5 ++-
 4 files changed, 104 insertions(+), 68 deletions(-)
---
diff --git a/docs/reference/latexila-sections.txt b/docs/reference/latexila-sections.txt
index 114cbe2..a47c738 100644
--- a/docs/reference/latexila-sections.txt
+++ b/docs/reference/latexila-sections.txt
@@ -132,7 +132,7 @@ latexila_build_view_get_type
 
 <SECTION>
 <FILE>latex-menu</FILE>
-latexila_latex_menu_do_something
+latexila_latex_menu_insert_text
 </SECTION>
 
 <SECTION>
diff --git a/src/latex_menu.vala b/src/latex_menu.vala
index c45e137..9620d3a 100644
--- a/src/latex_menu.vala
+++ b/src/latex_menu.vala
@@ -473,72 +473,11 @@ public class LatexMenu : Gtk.ActionGroup
     private void text_buffer_insert (string text_before, string text_after,
         string? text_if_no_selection = null)
     {
-        return_if_fail (main_window.active_tab != null);
-        Document active_document = main_window.active_document;
-
-        // we don't use the insert and selection_bound marks because we don't
-        // know the order. With gtk_text_buffer_get_selection_bounds, we are certain
-        // that "start" points to the start of the selection, where we must insert
-        // "text_before".
-
-        TextIter start, end;
-        bool text_selected = active_document.get_selection_bounds (out start, out end);
-
-        // take into account the current indentation
-        string? text_before2 = null;
-        string? text_after2 = null;
-
-        if (text_before.contains ("\n") || text_after.contains ("\n"))
-        {
-            string current_indent = Tepl.iter_get_line_indentation (start);
-
-            if (current_indent != "")
-            {
-                text_before2 = text_before.replace ("\n", @"\n$current_indent");
-                text_after2 = text_after.replace ("\n", @"\n$current_indent");
-            }
-        }
-
-        active_document.begin_user_action ();
-
-        // insert around the selected text
-        // move the cursor to the end
-        if (text_selected)
-        {
-            TextMark mark_end = active_document.create_mark (null, end, false);
-            active_document.insert (ref start, text_before2 ?? text_before, -1);
-            active_document.get_iter_at_mark (out end, mark_end);
-            active_document.insert (ref end, text_after2 ?? text_after, -1);
-
-            active_document.get_iter_at_mark (out end, mark_end);
-            active_document.delete_mark (mark_end);
-            active_document.place_cursor (end);
-        }
-
-        // no selection
-        else if (text_if_no_selection != null)
-            active_document.insert_at_cursor (text_if_no_selection, -1);
-
-        // no selection
-        // move the cursor between the 2 texts inserted
-        else
-        {
-            active_document.insert_at_cursor (text_before2 ?? text_before, -1);
-
-            TextIter between;
-            active_document.get_iter_at_mark (out between, active_document.get_insert ());
-            TextMark mark = active_document.create_mark (null, between, true);
-
-            active_document.insert_at_cursor (text_after2 ?? text_after, -1);
-
-            active_document.get_iter_at_mark (out between, mark);
-            active_document.delete_mark (mark);
-            active_document.place_cursor (between);
-        }
-
-        active_document.end_user_action ();
+        Tepl.ApplicationWindow tepl_window =
+            Tepl.ApplicationWindow.get_from_gtk_application_window (main_window);
 
-        main_window.active_view.grab_focus ();
+        Latexila.latex_menu_insert_text (tepl_window, text_before, text_after,
+            text_if_no_selection);
     }
 
     private string get_indentation ()
diff --git a/src/liblatexila/latexila-latex-menu.c b/src/liblatexila/latexila-latex-menu.c
index b0b853b..c6bd605 100644
--- a/src/liblatexila/latexila-latex-menu.c
+++ b/src/liblatexila/latexila-latex-menu.c
@@ -24,8 +24,102 @@
  */
 
 #include "latexila-latex-menu.h"
+#include "latexila-utils.h"
 
+/* Temporarily public, will be made private when all GActions for the LaTeX and
+ * Math menus are implemented.
+ */
 void
-latexila_latex_menu_do_something (void)
+latexila_latex_menu_insert_text (TeplApplicationWindow *tepl_window,
+                                 const gchar           *text_before,
+                                 const gchar           *text_after,
+                                 const gchar           *text_if_no_selection)
 {
+  TeplView *view;
+  GtkTextBuffer *buffer;
+  GtkTextIter selection_start;
+  GtkTextIter selection_end;
+  gboolean has_selection;
+  gchar *text_before_with_indent;
+  gchar *text_after_with_indent;
+
+  g_return_if_fail (TEPL_IS_APPLICATION_WINDOW (tepl_window));
+  g_return_if_fail (text_before != NULL);
+  g_return_if_fail (text_after != NULL);
+
+  view = tepl_tab_group_get_active_view (TEPL_TAB_GROUP (tepl_window));
+  g_return_if_fail (view != NULL);
+
+  buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
+
+  has_selection = gtk_text_buffer_get_selection_bounds (buffer,
+                                                        &selection_start,
+                                                        &selection_end);
+
+  /* Take into account the current indentation. */
+  {
+    gchar *current_indent;
+    gchar *newline_replacement;
+
+    current_indent = tepl_iter_get_line_indentation (&selection_start);
+    newline_replacement = g_strdup_printf ("\n%s", current_indent);
+
+    text_before_with_indent = latexila_utils_str_replace (text_before, "\n", newline_replacement);
+    text_after_with_indent = latexila_utils_str_replace (text_after, "\n", newline_replacement);
+
+    g_free (current_indent);
+    g_free (newline_replacement);
+  }
+
+  gtk_text_buffer_begin_user_action (buffer);
+
+  /* Insert around the selected text.
+   * Move the cursor to the end.
+   */
+  if (has_selection)
+    {
+      GtkTextMark *end_mark;
+      GtkTextIter end_iter;
+
+      end_mark = gtk_text_buffer_create_mark (buffer, NULL, &selection_end, FALSE);
+
+      gtk_text_buffer_insert (buffer, &selection_start, text_before_with_indent, -1);
+
+      gtk_text_buffer_get_iter_at_mark (buffer, &end_iter, end_mark);
+      gtk_text_buffer_delete_mark (buffer, end_mark);
+
+      gtk_text_buffer_insert (buffer, &end_iter, text_after_with_indent, -1);
+      gtk_text_buffer_place_cursor (buffer, &end_iter);
+    }
+  /* No selection */
+  else if (text_if_no_selection != NULL)
+    {
+      gtk_text_buffer_insert_at_cursor (buffer, text_if_no_selection, -1);
+    }
+  /* No selection, move the cursor between the two inserted chunks. */
+  else
+    {
+      GtkTextIter between_iter;
+      GtkTextMark *between_mark;
+
+      gtk_text_buffer_insert_at_cursor (buffer, text_before_with_indent, -1);
+
+      gtk_text_buffer_get_iter_at_mark (buffer,
+                                        &between_iter,
+                                        gtk_text_buffer_get_insert (buffer));
+      between_mark = gtk_text_buffer_create_mark (buffer, NULL, &between_iter, TRUE);
+
+      gtk_text_buffer_insert_at_cursor (buffer, text_after_with_indent, -1);
+
+      gtk_text_buffer_get_iter_at_mark (buffer, &between_iter, between_mark);
+      gtk_text_buffer_delete_mark (buffer, between_mark);
+      gtk_text_buffer_place_cursor (buffer, &between_iter);
+    }
+
+  gtk_text_buffer_end_user_action (buffer);
+
+  gtk_widget_grab_focus (GTK_WIDGET (view));
+
+  g_free (text_before_with_indent);
+  g_free (text_after_with_indent);
 }
diff --git a/src/liblatexila/latexila-latex-menu.h b/src/liblatexila/latexila-latex-menu.h
index 628d311..e6d971d 100644
--- a/src/liblatexila/latexila-latex-menu.h
+++ b/src/liblatexila/latexila-latex-menu.h
@@ -24,7 +24,10 @@
 
 G_BEGIN_DECLS
 
-void latexila_latex_menu_do_something (void);
+void      latexila_latex_menu_insert_text       (TeplApplicationWindow *tepl_window,
+                                                 const gchar           *text_before,
+                                                 const gchar           *text_after,
+                                                 const gchar           *text_if_no_selection);
 
 G_END_DECLS