]> git.lyx.org Git - lyx.git/blobdiff - src/frontends/xforms/FormParagraph.C
Change the semantics of 'none' and 'auto' viewers/editors: 'none' means now
[lyx.git] / src / frontends / xforms / FormParagraph.C
index 5ddde6967ae9c6aed29b54e4c470c3abf033ffd1..a5f36f809618afe07ac452af612ffe5097a24476 100644 (file)
 /**
  * \file FormParagraph.C
- * Copyright 2000-2001 The LyX Team.
- * See the file COPYING.
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
  *
- * \author Jürgen Vigna, jug@sad.it
+ * \author Jürgen Vigna
+ * \author Rob Lahaye
+ *
+ * Full author contact details are available in file CREDITS.
  */
 
 #include <config.h>
 
-#ifdef __GNUG__
-#pragma implementation
-#endif
-
-#include FORMS_H_LOCATION
-
 #include "FormParagraph.h"
-#include "form_paragraph.h"
-#include "Dialogs.h"
-#include "Liason.h"
-#include "frontends/LyXView.h"
-#include "buffer.h"
-#include "lyxtext.h"
+#include "ControlParagraph.h"
+#include "forms/form_paragraph.h"
+
+#include "checkedwidgets.h"
+#include "input_validators.h"
+#include "Tooltips.h"
 #include "xforms_helpers.h"
+#include "xformsBC.h"
+
+#include "controllers/helper_funcs.h"
+
 #include "lyxrc.h" // to set the deafult length values
-#include "BufferView.h"
-#include "lyxtextclasslist.h"
-#include "Spacing.h"
 #include "ParagraphParameters.h"
-#include "input_validators.h"
-#include "helper_funcs.h"
+#include "Spacing.h"
 
 #include "support/lstrings.h"
-#include "support/LAssert.h"
+#include "support/convert.h"
+
+#include "lyx_forms.h"
 
 #include <boost/bind.hpp>
 
-#include <functional>
+using boost::bind;
 
-using Liason::setMinibuffer;
-using std::vector;
-using std::bind2nd;
 using std::remove_if;
 
+using std::vector;
+using std::string;
 
-FormParagraph::FormParagraph(LyXView * lv, Dialogs * d)
-       : FormBaseBD(lv, d, _("Paragraph Layout")), par_(0)
-{
-       // let the dialog be shown
-       // This is a permanent connection so we won't bother
-       // storing a copy because we won't be disconnecting.
-       d->showParagraph = boost::bind(&FormParagraph::show, this);
-}
-
-
-void FormParagraph::connect()
-{
-       cp_ = d_->updateParagraph
-               .connect(boost::bind(&FormParagraph::changedParagraph, this));
-       FormBaseBD::connect();
-}
-
-
-void FormParagraph::disconnect()
-{
-       cp_.disconnect();
-       FormBaseBD::disconnect();
-}
-
-
-Paragraph const * FormParagraph::getCurrentParagraph() const
-{
-       return lv_->view()->getLyXText()->cursor.par();
-}
-
-
-void FormParagraph::changedParagraph()
-{
-       /// Record the paragraph
-       Paragraph const * const p = getCurrentParagraph();
-       if (p == 0) // this is wrong as we don't set par_ here! /* || p == par_) */
-               return;
-
-       // For now, don't bother checking if the params are different.
+namespace lyx {
 
-       // Will the underlying paragraph accept our changes?
-       Inset * const inset = p->inInset();
-       bool const accept = !(inset && inset->forceDefaultParagraphs(inset));
-       bc().valid(accept);
+using support::contains;
+using support::getStringFromVector;
+using support::rtrim;
 
-       if (!accept) {
-               postWarning(_("Cannot apply paragraph settings to this inset!"));
-       } else {
-               clearMessage();
-       }
-}
-
-
-void FormParagraph::redraw()
-{
-       if (form() && form()->visible)
-               fl_redraw_form(form());
-}
+namespace frontend {
 
+typedef FormController<ControlParagraph, FormView<FD_paragraph> > base_class;
 
-FL_FORM * FormParagraph::form() const
-{
-       if (dialog_.get())
-               return dialog_->form;
-       return 0;
-}
+FormParagraph::FormParagraph(Dialog & parent)
+       : base_class(parent, _("Paragraph Settings"))
+{}
 
 
 void FormParagraph::build()
 {
        // the tabbed folder
-       dialog_.reset(build_paragraph());
+       dialog_.reset(build_paragraph(this));
 
-       // Allow the base class to control messages
-       setMessageWidget(dialog_->text_warning);
+       // Manage the ok, apply, restore and cancel/close buttons
+       bcview().setOK(dialog_->button_ok);
+       bcview().setApply(dialog_->button_apply);
+       bcview().setCancel(dialog_->button_close);
+       bcview().setRestore(dialog_->button_restore);
 
-       fl_addto_choice(dialog_->choice_space_above,
-                       _(" None | Defskip | Smallskip "
-                         "| Medskip | Bigskip | VFill | Length "));
-       fl_addto_choice(dialog_->choice_space_below,
-                       _(" None | Defskip | Smallskip "
-                         "| Medskip | Bigskip | VFill | Length "));
+       // disable for read-only documents
+       bcview().addReadOnly(dialog_->check_noindent);
+       bcview().addReadOnly(dialog_->choice_linespacing);
+       bcview().addReadOnly(dialog_->input_linespacing);
 
-       fl_addto_choice(dialog_->choice_linespacing,
-                       _(" Default | Single | OneHalf | Double | Custom "));
+       bcview().addReadOnly(dialog_->input_labelwidth);
+
+       // trigger an input event for cut&paste with middle mouse button.
+       setPrehandler(dialog_->input_linespacing);
+       setPrehandler(dialog_->input_labelwidth);
 
-       fl_set_input_return(dialog_->input_space_above, FL_RETURN_CHANGED);
-       fl_set_input_return(dialog_->input_space_below, FL_RETURN_CHANGED);
        fl_set_input_return(dialog_->input_labelwidth,  FL_RETURN_CHANGED);
        fl_set_input_return(dialog_->input_linespacing, FL_RETURN_CHANGED);
+
+       // limit these inputs to unsigned floats
        fl_set_input_filter(dialog_->input_linespacing, fl_unsigned_float_filter);
 
-       setPrehandler(dialog_->input_space_above);
-       setPrehandler(dialog_->input_space_below);
-       setPrehandler(dialog_->input_labelwidth);
-       setPrehandler(dialog_->input_linespacing);
+       // add alignment radio buttons
+       alignment_.init(dialog_->radio_align_left,   LYX_ALIGN_LEFT);
+       alignment_.init(dialog_->radio_align_right,  LYX_ALIGN_RIGHT);
+       alignment_.init(dialog_->radio_align_block,  LYX_ALIGN_BLOCK);
+       alignment_.init(dialog_->radio_align_center, LYX_ALIGN_CENTER);
+
+       string const linespacing = _("Default|Single|OneHalf|Double|Custom");
+       fl_addto_choice(dialog_->choice_linespacing, linespacing.c_str());
 
-       // Create the contents of the unit choices
-       // Don't include the "%" terms...
+       // Create the contents of the unit choices; don't include the "%" terms.
        vector<string> units_vec = getLatexUnits();
-#if 0
-       for (vector<string>::iterator it = units_vec.begin();
-            it != units_vec.end(); ++it) {
-               if (contains(*it, "%"))
-                       it = units_vec.erase(it, it+1) - 1;
-       }
-#else
-       // Something similar to this is a better way to erase
        vector<string>::iterator del =
                remove_if(units_vec.begin(), units_vec.end(),
-                         bind2nd(contains_functor(), "%"));
+                         bind(contains<char>, _1, '%'));
        units_vec.erase(del, units_vec.end());
-#endif
-
-       string units = getStringFromVector(units_vec, "|");
-
-       fl_addto_choice(dialog_->choice_value_space_above, units.c_str());
-       fl_addto_choice(dialog_->choice_value_space_below, units.c_str());
-
-       // Manage the ok, apply, restore and cancel/close buttons
-       bc_.setOK(dialog_->button_ok);
-       bc_.setApply(dialog_->button_apply);
-       bc_.setCancel(dialog_->button_close);
-       bc_.setRestore(dialog_->button_restore);
-
-       bc_.addReadOnly(dialog_->radio_align_right);
-       bc_.addReadOnly(dialog_->radio_align_left);
-       bc_.addReadOnly(dialog_->radio_align_block);
-       bc_.addReadOnly(dialog_->radio_align_center);
-       bc_.addReadOnly(dialog_->check_lines_top);
-       bc_.addReadOnly(dialog_->check_lines_bottom);
-       bc_.addReadOnly(dialog_->check_pagebreaks_top);
-       bc_.addReadOnly(dialog_->check_pagebreaks_bottom);
-       bc_.addReadOnly(dialog_->choice_space_above);
-       bc_.addReadOnly(dialog_->input_space_above);
-       bc_.addReadOnly(dialog_->check_space_above);
-       bc_.addReadOnly(dialog_->choice_space_below);
-       bc_.addReadOnly(dialog_->input_space_below);
-       bc_.addReadOnly(dialog_->check_space_below);
-       bc_.addReadOnly(dialog_->choice_linespacing);
-       bc_.addReadOnly(dialog_->input_linespacing);
-       bc_.addReadOnly(dialog_->check_noindent);
-       bc_.addReadOnly(dialog_->input_labelwidth);
-}
-
-
-namespace {
-
-VSpace setVSpaceFromWidgets(FL_OBJECT * choice_type,
-                           FL_OBJECT * input_length,
-                           FL_OBJECT * choice_length,
-                           FL_OBJECT * check_keep)
-{
-       // Paranoia check!
-       lyx::Assert(choice_type   && choice_type->objclass   == FL_CHOICE &&
-                   input_length  && input_length->objclass  == FL_INPUT &&
-                   choice_length && choice_length->objclass == FL_CHOICE &&
-                   check_keep    && check_keep->objclass    == FL_CHECKBUTTON);
-
-       VSpace space;
-
-       switch (fl_get_choice(choice_type)) {
-       case 1:
-               space = VSpace(VSpace::NONE);
-               break;
-       case 2:
-               space = VSpace(VSpace::DEFSKIP);
-               break;
-       case 3:
-               space = VSpace(VSpace::SMALLSKIP);
-               break;
-       case 4:
-               space = VSpace(VSpace::MEDSKIP);
-               break;
-       case 5:
-               space = VSpace(VSpace::BIGSKIP);
-               break;
-       case 6:
-               space = VSpace(VSpace::VFILL);
-               break;
-       case 7:
-       {
-               string const length =
-                       getLengthFromWidgets(input_length, choice_length);
-               space = VSpace(LyXGlueLength(length));
-               break;
-       }
-       }
-
-       if (fl_get_button(check_keep))
-               space.setKeep(true);
-
-       return space;
-}
-
-
-void validateVSpaceWidgets(FL_OBJECT * choice_type, FL_OBJECT * input_length)
-{
-       // Paranoia check!
-       lyx::Assert(choice_type  && choice_type->objclass   == FL_CHOICE &&
-                   input_length && input_length->objclass  == FL_INPUT);
-
-       if (fl_get_choice(choice_type) != 7)
-               return;
-
-       // If a vspace kind is "Length" but there's no text in
-       // the input field, reset the kind to "None".
-       string const input = strip(getStringFromInput(input_length));
-       if (input.empty())
-               fl_set_choice(choice_type, 1);
 }
 
-} // namespace anon
-
 
 void FormParagraph::apply()
 {
-       if (!lv_->view()->available() || !dialog_.get())
+       if (!form())
                return;
 
-       // If a vspace kind is "Length" but there's no text in
-       // the input field, reset the kind to "None".
-       validateVSpaceWidgets(dialog_->choice_space_above,
-                             dialog_->input_space_above);
-       validateVSpaceWidgets(dialog_->choice_space_below,
-                             dialog_->input_space_below);
-
-       bool const line_top = fl_get_button(dialog_->check_lines_top);
-       bool const line_bottom = fl_get_button(dialog_->check_lines_bottom);
-       bool const pagebreak_top = fl_get_button(dialog_->check_pagebreaks_top);
-       bool const pagebreak_bottom = fl_get_button(dialog_->check_pagebreaks_bottom);
-
-       VSpace const space_top =
-               setVSpaceFromWidgets(dialog_->choice_space_above,
-                                    dialog_->input_space_above,
-                                    dialog_->choice_value_space_above,
-                                    dialog_->check_space_above);
-
-       VSpace const space_bottom =
-               setVSpaceFromWidgets(dialog_->choice_space_below,
-                                    dialog_->input_space_below,
-                                    dialog_->choice_value_space_below,
-                                    dialog_->check_space_below);
-
-       LyXAlignment align;
-       if (fl_get_button(dialog_->radio_align_left))
-               align = LYX_ALIGN_LEFT;
-       else if (fl_get_button(dialog_->radio_align_right))
-               align = LYX_ALIGN_RIGHT;
-       else if (fl_get_button(dialog_->radio_align_center))
-               align = LYX_ALIGN_CENTER;
-       else
-               align = LYX_ALIGN_BLOCK;
+       // alignment
+       LyXAlignment const alignment =
+               static_cast<LyXAlignment>(alignment_.get());
+       controller().params().align(alignment);
 
+       // label width
        string const labelwidthstring =
-               getStringFromInput(dialog_->input_labelwidth);
+               getString(dialog_->input_labelwidth);
+       controller().params().labelWidthString(labelwidthstring);
 
+       // indendation
        bool const noindent = fl_get_button(dialog_->check_noindent);
+       controller().params().noindent(noindent);
 
+       // get spacing
        Spacing::Space linespacing = Spacing::Default;
        string other;
        switch (fl_get_choice(dialog_->choice_linespacing)) {
@@ -318,287 +138,135 @@ void FormParagraph::apply()
                linespacing = Spacing::Double;
                break;
        case 5:
-               linespacing = Spacing::Other;
-               other = getStringFromInput(dialog_->input_linespacing);
+               // reset to default if input is empty
+               other = getString(dialog_->input_linespacing);
+               if (!other.empty()) {
+                       linespacing = Spacing::Other;
+               } else {
+                       linespacing = Spacing::Default;
+                       fl_set_choice(dialog_->choice_linespacing, 1);
+               }
                break;
        }
-
        Spacing const spacing(linespacing, other);
-
-       LyXText * text(lv_->view()->getLyXText());
-       text->setParagraph(lv_->view(), line_top, line_bottom, pagebreak_top,
-                          pagebreak_bottom, space_top, space_bottom, spacing,
-                          align, labelwidthstring, noindent);
-
-       // Actually apply these settings
-       lv_->view()->update(text,
-                           BufferView::SELECT | BufferView::FITCUR | BufferView::CHANGE);
-       lv_->buffer()->markDirty();
-       setMinibuffer(lv_, _("Paragraph layout set"));
+       controller().params().spacing(spacing);
 }
 
 
-namespace {
-
-void setWidgetsFromVSpace(VSpace const & space,
-                         FL_OBJECT * choice_type,
-                         FL_OBJECT * input_length,
-                         FL_OBJECT * choice_length,
-                         FL_OBJECT * check_keep)
-{
-       // Paranoia check!
-       lyx::Assert(choice_type   && choice_type->objclass   == FL_CHOICE &&
-                   input_length  && input_length->objclass  == FL_INPUT &&
-                   choice_length && choice_length->objclass == FL_CHOICE &&
-                   check_keep    && check_keep->objclass    == FL_CHECKBUTTON);
-
-       fl_set_input(input_length, "");
-       setEnabled(input_length,  false);
-       setEnabled(choice_length, false);
-
-       switch (space.kind()) {
-       case VSpace::NONE:
-               fl_set_choice(choice_type, 1);
-               break;
-       case VSpace::DEFSKIP:
-               fl_set_choice(choice_type, 2);
-               break;
-       case VSpace::SMALLSKIP:
-               fl_set_choice(choice_type, 3);
-               break;
-       case VSpace::MEDSKIP:
-               fl_set_choice(choice_type, 4);
-               break;
-       case VSpace::BIGSKIP:
-               fl_set_choice(choice_type, 5);
-               break;
-       case VSpace::VFILL:
-               fl_set_choice(choice_type, 6);
-               break;
-       case VSpace::LENGTH:
-       {
-               fl_set_choice(choice_type, 7);
-
-               setEnabled(input_length,  true);
-               setEnabled(choice_length, true);
-
-               bool const metric = lyxrc.default_papersize > 3;
-               string const default_unit = metric ? "cm" : "in";
-               string const length = space.length().asString();
-
-               updateWidgetsFromLengthString(input_length, choice_length,
-                                             length, default_unit);
-               break;
-       }
-       }
-
-       fl_set_button(check_keep, space.keep());
-}
-
-} // namespace anon
-
-
 void FormParagraph::update()
 {
        if (!dialog_.get())
                return;
 
-       // Do this first; some objects may be de/activated subsequently.
-       bc_.readOnly(lv_->buffer()->isReadonly());
-
-       /// Record the paragraph
-       par_ = getCurrentParagraph();
-
-       fl_set_input(dialog_->input_labelwidth,
-                    par_->getLabelWidthString().c_str());
+       // label width
+       string const labelwidth = controller().params().labelWidthString();
+       fl_set_input(dialog_->input_labelwidth, labelwidth.c_str());
        setEnabled(dialog_->input_labelwidth,
-                  (par_->getLabelWidthString() != _("Senseless with this layout!")));
+                  labelwidth != _("Senseless with this layout!"));
 
-       fl_set_button(dialog_->radio_align_right, 0);
-       fl_set_button(dialog_->radio_align_left, 0);
-       fl_set_button(dialog_->radio_align_center, 0);
-       fl_set_button(dialog_->radio_align_block, 0);
+       // alignment
+       alignment_.set(controller().params().align());
 
-       LyXTextClass const & tclass =
-               textclasslist[lv_->view()->buffer()->params.textclass];
+       // mark default alignment
+       LyXAlignment const default_alignment = controller().alignDefault();
 
-       int align = par_->getAlign();
-       if (align == LYX_ALIGN_LAYOUT)
-               align = tclass[par_->layout()].align;
+       string label = _("Block");
+       if (default_alignment == LYX_ALIGN_BLOCK) {
+               label += _(" (default)");
+       }
+       fl_set_object_label(dialog_->radio_align_block, label.c_str());
+       fl_set_button_shortcut(dialog_->radio_align_block, "#B", 1);
 
-       switch (align) {
-       case LYX_ALIGN_RIGHT:
-               fl_set_button(dialog_->radio_align_right, 1);
-               break;
-       case LYX_ALIGN_LEFT:
-               fl_set_button(dialog_->radio_align_left, 1);
-               break;
-       case LYX_ALIGN_CENTER:
-               fl_set_button(dialog_->radio_align_center, 1);
-               break;
-       default:
-               fl_set_button(dialog_->radio_align_block, 1);
-               break;
+       label = _("Center");
+       if (default_alignment == LYX_ALIGN_CENTER) {
+               label += _(" (default)");
+       }
+       fl_set_object_label(dialog_->radio_align_center, label.c_str());
+       fl_set_button_shortcut(dialog_->radio_align_center, "#C", 1);
+
+       label = _("Left");
+       if (default_alignment == LYX_ALIGN_LEFT) {
+               label += _(" (default)");
        }
+       fl_set_object_label(dialog_->radio_align_left, label.c_str());
+       fl_set_button_shortcut(dialog_->radio_align_left, "#L", 1);
 
-       LyXAlignment alignpos = tclass[par_->layout()].alignpossible;
-
-       setEnabled(dialog_->radio_align_block,  bool(alignpos & LYX_ALIGN_BLOCK));
-       setEnabled(dialog_->radio_align_center, bool(alignpos & LYX_ALIGN_CENTER));
-       setEnabled(dialog_->radio_align_left,   bool(alignpos & LYX_ALIGN_LEFT));
-       setEnabled(dialog_->radio_align_right,  bool(alignpos & LYX_ALIGN_RIGHT));
-
-       // no inset-text-owned paragraph may have pagebreaks
-       setEnabled(dialog_->check_pagebreaks_top, !par_->inInset());
-       setEnabled(dialog_->check_pagebreaks_bottom, !par_->inInset());
-
-       fl_set_button(dialog_->check_lines_top,
-                     par_->params().lineTop());
-       fl_set_button(dialog_->check_lines_bottom,
-                     par_->params().lineBottom());
-       fl_set_button(dialog_->check_pagebreaks_top,
-                     par_->params().pagebreakTop());
-       fl_set_button(dialog_->check_pagebreaks_bottom,
-                     par_->params().pagebreakBottom());
+       label = _("Right");
+       if (default_alignment == LYX_ALIGN_RIGHT) {
+               label = _(" (default)");
+       }
+       fl_set_object_label(dialog_->radio_align_right, label.c_str());
+       fl_set_button_shortcut(dialog_->radio_align_right, "#R", 1);
+
+       // Ensure that there's no crud left on the screen from this change
+       // of labels.
+       fl_redraw_form(form());
+
+       LyXAlignment alignpos = controller().alignPossible();
+       setEnabled(dialog_->radio_align_block,
+                  bool(alignpos & LYX_ALIGN_BLOCK));
+       setEnabled(dialog_->radio_align_center,
+                  bool(alignpos & LYX_ALIGN_CENTER));
+       setEnabled(dialog_->radio_align_left,
+                  bool(alignpos & LYX_ALIGN_LEFT));
+       setEnabled(dialog_->radio_align_right,
+                  bool(alignpos & LYX_ALIGN_RIGHT));
+
+       // lines, pagebreaks and indent
        fl_set_button(dialog_->check_noindent,
-                     par_->params().noindent());
+                     controller().params().noindent());
 
-       int linespacing;
-       Spacing const space = par_->params().spacing();
+       // linespacing
+       Spacing const space = controller().params().spacing();
 
+       int pos;
        switch (space.getSpace()) {
-       default: linespacing = 1; break;
-       case Spacing::Single: linespacing = 2; break;
-       case Spacing::Onehalf: linespacing = 3; break;
-       case Spacing::Double: linespacing = 4; break;
-       case Spacing::Other: linespacing = 5; break;
+       case Spacing::Other:
+               pos = 5;
+               break;
+       case Spacing::Double:
+               pos = 4;
+               break;
+       case Spacing::Onehalf:
+               pos = 3;
+               break;
+       case Spacing::Single:
+               pos = 2;
+               break;
+       case Spacing::Default:
+       default:
+               pos = 1;
+               break;
        }
+       fl_set_choice(dialog_->choice_linespacing, pos);
 
-       fl_set_choice(dialog_->choice_linespacing, linespacing);
-       if (space.getSpace() == Spacing::Other) {
-               string const sp = tostr(space.getValue());
-               fl_set_input(dialog_->input_linespacing, sp.c_str());
-               setEnabled(dialog_->input_linespacing, true);
+       bool const spacing_other = space.getSpace() == Spacing::Other;
+       setEnabled(dialog_->input_linespacing, spacing_other);
+       if (spacing_other) {
+               fl_set_input(dialog_->input_linespacing,
+                       space.getValueAsString().c_str());
        } else {
                fl_set_input(dialog_->input_linespacing, "");
-               setEnabled(dialog_->input_linespacing, false);
        }
 
-       setWidgetsFromVSpace(par_->params().spaceTop(),
-                            dialog_->choice_space_above,
-                            dialog_->input_space_above,
-                            dialog_->choice_value_space_above,
-                            dialog_->check_space_above);
-
-       setWidgetsFromVSpace(par_->params().spaceBottom(),
-                            dialog_->choice_space_below,
-                            dialog_->input_space_below,
-                            dialog_->choice_value_space_below,
-                            dialog_->check_space_below);
-
+       // no indent
        fl_set_button(dialog_->check_noindent,
-                     par_->params().noindent());
+                     controller().params().noindent());
 }
 
 
-namespace {
-
-void synchronizeSpaceWidgets(FL_OBJECT * choice_type,
-                            FL_OBJECT * input_length,
-                            FL_OBJECT * choice_length,
-                            bool readonly)
+ButtonPolicy::SMInput FormParagraph::input(FL_OBJECT * ob, long)
 {
-       // Paranoia check!
-       lyx::Assert(choice_type   && choice_type->objclass   == FL_CHOICE &&
-                   input_length  && input_length->objclass  == FL_INPUT &&
-                   choice_length && choice_length->objclass == FL_CHOICE);
-
-       if (fl_get_choice(choice_type) != 7) {
-               fl_set_input(input_length, "");
-               setEnabled(input_length, false);
-               setEnabled(choice_length, false);
-
-       } else {
-               setEnabled(input_length,  !readonly);
-               setEnabled(choice_length, !readonly);
-
-               string const length = getStringFromInput(input_length);
-
-               if (strip(length).empty()) {
-                       bool const metric = lyxrc.default_papersize > 3;
-                       int const default_unit = metric ? 8 : 9;
-
-                       fl_set_choice(choice_length, default_unit);
-               }
+       // Enable input when custum length is choosen,
+       // disable 'keep' when no space is choosen
+       if (ob == dialog_->choice_linespacing) {
+               bool const custom_spacing =
+                       fl_get_choice(dialog_->choice_linespacing) == 5;
+               setEnabled(dialog_->input_linespacing, custom_spacing);
        }
-}
 
-bool validSpaceWidgets(FL_OBJECT * choice_type, FL_OBJECT * input_length)
-{
-       // Paranoia check!
-       lyx::Assert(choice_type  && choice_type->objclass   == FL_CHOICE &&
-                   input_length && input_length->objclass  == FL_INPUT);
-
-       if (fl_get_choice(choice_type) != 7)
-               return true;
-
-       string const input = getStringFromInput(input_length);
-       return (input.empty() ||
-               isValidGlueLength(input) ||
-               isStrDbl(input));
+       return ButtonPolicy::SMI_VALID;
 }
 
-} // namespace anon
-
-
-bool FormParagraph::input(FL_OBJECT * ob, long)
-{
-       clearMessage();
-
-       // First check the buttons which are exclusive and you have to
-       // check only the actuall de/activated button.
-       //
-       // "Synchronize" the choices and input fields, making it
-       // impossible to commit senseless data.
-
-       if (ob == dialog_->choice_space_above) {
-               synchronizeSpaceWidgets(dialog_->choice_space_above,
-                                       dialog_->input_space_above,
-                                       dialog_->choice_value_space_above,
-                                       lv_->buffer()->isReadonly());
-       }
-
-       if (ob == dialog_->choice_space_below) {
-               synchronizeSpaceWidgets(dialog_->choice_space_below,
-                                       dialog_->input_space_below,
-                                       dialog_->choice_value_space_below,
-                                       lv_->buffer()->isReadonly());
-       }
-
-       // Display a warning if the input is senseless
-       bool valid = (validSpaceWidgets(dialog_->choice_space_above,
-                                       dialog_->input_space_above) &&
-                     validSpaceWidgets(dialog_->choice_space_below,
-                                       dialog_->input_space_below));
-
-       if (!valid) {
-               postWarning(_("Invalid Length (valid example: 10mm)"));
-       }
-
-       int const choice_spacing = fl_get_choice(dialog_->choice_linespacing);
-
-       if (choice_spacing == 5)
-               setEnabled(dialog_->input_linespacing, true);
-       else {
-               fl_set_input(dialog_->input_linespacing, "");
-               setEnabled(dialog_->input_linespacing, false);
-       }
-
-       double const spacing =
-               strToDbl(getStringFromInput(dialog_->input_linespacing));
-
-       if (choice_spacing == 5 && int(spacing) == 0)
-               valid = false;
-
-       return valid;
-}
+} // namespace frontend
+} // namespace lyx