Revert "Parially revert fffb138b8175b4838b6a063863756b7c6b2db547"

This reverts commit c487dd2bdb.

Revert the commit that
partially reverted fffb138b81 ...
It turns out that this very much did break IME input, so reverting
this for now. This does make Aegisub use private symbols in wx again,
but the CI builds build wx from the wrap now. Still, this is why
this is on the workarounds branch. If this breaks for too many
people this could either go behind a meson option or be fixed in
some better magical way that I have yet to find.

Fixes arch1t3cht/Aegisub#90
Fixes arch1t3cht/Aegisub#91

src/meson.build

@@ -168,6 +168,7 @@ if host_machine.system() == 'darwin'
         'font_file_lister_coretext.mm',
         'osx/osx_utils.mm',
         'osx/retina_helper.mm',
+        'osx/scintilla_ime.mm',
     )
 elif host_machine.system() == 'windows'
     aegisub_src += files(

src/osx/scintilla_ime.mm

@@ -0,0 +1,212 @@
+// Copyright (c) 2014, Thomas Goyne <plorkyeran@aegisub.org>
+//
+// Permission to use, copy, modify, and distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+//
+// Aegisub Project http://www.aegisub.org/
+
+#import <objc/runtime.h>
+#import <wx/osx/private.h>
+#import <wx/stc/stc.h>
+
+// from src/osx/cocoa/window.mm
+@interface wxNSView : NSView <NSTextInputClient> {
+    BOOL _hasToolTip;
+    NSTrackingRectTag _lastToolTipTrackTag;
+    id _lastToolTipOwner;
+    void *_lastUserData;
+}
+@end
+
+@interface IMEState : NSObject
+@property (nonatomic) NSRange markedRange;
+@property (nonatomic) bool undoActive;
+@end
+
+@implementation IMEState
+- (id)init {
+    self = [super init];
+    self.markedRange = NSMakeRange(NSNotFound, 0);
+    self.undoActive = false;
+    return self;
+}
+@end
+
+@interface ScintillaNSView : wxNSView <NSTextInputClient>
+@property (nonatomic, readonly) wxStyledTextCtrl *stc;
+@property (nonatomic, readonly) IMEState *state;
+@end
+
+@implementation ScintillaNSView
+- (Class)superclass {
+    return [wxNSView superclass];
+}
+
+- (wxStyledTextCtrl *)stc {
+    return static_cast<wxStyledTextCtrl *>(wxWidgetImpl::FindFromWXWidget(self)->GetWXPeer());
+}
+
+- (IMEState *)state {
+    return objc_getAssociatedObject(self, [IMEState class]);
+}
+
+- (void)invalidate {
+    self.state.markedRange = NSMakeRange(NSNotFound, 0);
+    [self.inputContext discardMarkedText];
+}
+
+#pragma mark - NSTextInputClient
+
+- (NSAttributedString *)attributedSubstringForProposedRange:(NSRange)aRange
+                                                actualRange:(NSRangePointer)actualRange
+{
+    return nil;
+}
+
+- (NSUInteger)characterIndexForPoint:(NSPoint)point {
+    return self.stc->PositionFromPoint(wxPoint(point.x, point.y));
+}
+
+- (BOOL)drawsVerticallyForCharacterAtIndex:(NSUInteger)charIndex {
+    return NO;
+}
+
+- (NSRect)firstRectForCharacterRange:(NSRange)range
+                         actualRange:(NSRangePointer)actualRange
+{
+    auto stc = self.stc;
+    int line = stc->LineFromPosition(range.location);
+    int height = stc->TextHeight(line);
+    auto pt = stc->PointFromPosition(range.location);
+
+    int width = 0;
+    if (range.length > 0) {
+        // If the end of the range is on the next line, the range should be
+        // truncated to the current line and actualRange should be set to the
+        // truncated range
+        int end_line = stc->LineFromPosition(range.location + range.length);
+        if (end_line > line) {
+            range.length = stc->PositionFromLine(line + 1) - 1 - range.location;
+            *actualRange = range;
+        }
+
+        auto end_pt = stc->PointFromPosition(range.location + range.length);
+        width = end_pt.x - pt.x;
+    }
+
+    auto rect = NSMakeRect(pt.x, pt.y, width, height);
+    rect = [self convertRect:rect toView:nil];
+    return [self.window convertRectToScreen:rect];
+}
+
+- (BOOL)hasMarkedText {
+    return self.state.markedRange.length > 0;
+}
+
+- (void)insertText:(id)str replacementRange:(NSRange)replacementRange {
+    [self unmarkText];
+    [super insertText:str replacementRange:replacementRange];
+}
+
+- (NSRange)markedRange {
+    return self.state.markedRange;
+}
+
+- (NSRange)selectedRange {
+    long from = 0, to = 0;
+    self.stc->GetSelection(&from, &to);
+    return NSMakeRange(from, to - from);
+}
+
+- (void)setMarkedText:(id)str
+        selectedRange:(NSRange)range
+     replacementRange:(NSRange)replacementRange
+{
+    if ([str isKindOfClass:[NSAttributedString class]])
+        str = [str string];
+
+    auto stc = self.stc;
+    auto state = self.state;
+
+    int pos = stc->GetInsertionPoint();
+    if (state.markedRange.length > 0) {
+        pos = state.markedRange.location;
+        stc->DeleteRange(pos, state.markedRange.length);
+        stc->SetSelection(pos, pos);
+    } else {
+        state.undoActive = stc->GetUndoCollection();
+        if (state.undoActive)
+            stc->SetUndoCollection(false);
+    }
+
+    auto utf8 = [str UTF8String];
+    auto utf8len = strlen(utf8);
+    stc->AddTextRaw(utf8, utf8len);
+
+    state.markedRange = NSMakeRange(pos, utf8len);
+
+    stc->SetIndicatorCurrent(1);
+    stc->IndicatorFillRange(pos, utf8len);
+
+    // Re-enable undo if we got a zero-length string as that means we're done
+    if (!utf8len && state.undoActive)
+        stc->SetUndoCollection(true);
+    else {
+        int start = pos;
+        // Range is in utf-16 code units
+        if (range.location > 0)
+            start += [[str substringToIndex:range.location] lengthOfBytesUsingEncoding:NSUTF8StringEncoding];
+        int length = [[str substringWithRange:range] lengthOfBytesUsingEncoding:NSUTF8StringEncoding];
+        stc->SetSelection(start, start + length);
+    }
+}
+
+- (void)unmarkText {
+    auto state = self.state;
+    if (state.markedRange.length > 0) {
+        self.stc->DeleteRange(state.markedRange.location, state.markedRange.length);
+        state.markedRange = NSMakeRange(NSNotFound, 0);
+        if (state.undoActive)
+            self.stc->SetUndoCollection(true);
+    }
+}
+
+- (NSArray *)validAttributesForMarkedText {
+    return @[];
+}
+@end
+
+namespace osx { namespace ime {
+void inject(wxStyledTextCtrl *ctrl) {
+    id view = (id)ctrl->GetHandle();
+    object_setClass(view, [ScintillaNSView class]);
+
+    auto state = [IMEState new];
+    objc_setAssociatedObject(view, [IMEState class], state,
+                             OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+    [state release];
+}
+
+void invalidate(wxStyledTextCtrl *ctrl) {
+    [(ScintillaNSView *)ctrl->GetHandle() invalidate];
+}
+
+bool process_key_event(wxStyledTextCtrl *ctrl, wxKeyEvent &evt) {
+    if (evt.GetModifiers() != 0) return false;
+    if (evt.GetKeyCode() != WXK_RETURN && evt.GetKeyCode() != WXK_TAB) return false;
+    if (![(ScintillaNSView *)ctrl->GetHandle() hasMarkedText]) return false;
+
+    evt.Skip();
+    return true;
+}
+
+} }

src/subs_edit_box.cpp

@@ -53,6 +53,7 @@
 #include "text_selection_controller.h"
 #include "timeedit_ctrl.h"
 #include "tooltip_manager.h"
+#include "utils.h"
 #include "validators.h"
 
 #include <libaegisub/character_count.h>
@@ -429,7 +430,8 @@ void SubsEditBox::UpdateFrameTiming(agi::vfr::Framerate const& fps) {
 }
 
 void SubsEditBox::OnKeyDown(wxKeyEvent &event) {
-	hotkey::check("Subtitle Edit Box", c, event);
+	if (!osx::ime::process_key_event(edit_ctrl, event))
+		hotkey::check("Subtitle Edit Box", c, event);
 }
 
 void SubsEditBox::OnChange(wxStyledTextEvent &event) {

src/subs_edit_ctrl.cpp

@@ -98,6 +98,8 @@ SubsTextEditCtrl::SubsTextEditCtrl(wxWindow* parent, wxSize wsize, long style, a
 , thesaurus(agi::make_unique<Thesaurus>())
 , context(context)
 {
+	osx::ime::inject(this);
+
 	// Set properties
 	SetWrapMode(wxSTC_WRAP_WORD);
 	SetMarginWidth(1,0);
@@ -200,6 +202,7 @@ void SubsTextEditCtrl::OnLoseFocus(wxFocusEvent &event) {
 }
 
 void SubsTextEditCtrl::OnKeyDown(wxKeyEvent &event) {
+	if (osx::ime::process_key_event(this, event)) return;
 	event.Skip();
 
 	// Workaround for wxSTC eating tabs.
@@ -257,6 +260,10 @@ void SubsTextEditCtrl::SetStyles() {
 	// Misspelling indicator
 	IndicatorSetStyle(0,wxSTC_INDIC_SQUIGGLE);
 	IndicatorSetForeground(0,wxColour(255,0,0));
+
+	// IME pending text indicator
+	IndicatorSetStyle(1, wxSTC_INDIC_PLAIN);
+	IndicatorSetUnder(1, true);
 }
 
 void SubsTextEditCtrl::UpdateStyle() {
@@ -321,6 +328,7 @@ void SubsTextEditCtrl::UpdateCallTip() {
 }
 
 void SubsTextEditCtrl::SetTextTo(std::string const& text) {
+	osx::ime::invalidate(this);
 	SetEvtHandlerEnabled(false);
 	Freeze();
 

src/utils.cpp

@@ -217,6 +217,13 @@ void SetFloatOnParent(wxWindow *) { }
 RetinaHelper::RetinaHelper(wxWindow *) { }
 RetinaHelper::~RetinaHelper() { }
 int RetinaHelper::GetScaleFactor() const { return 1; }
+
+// OS X implementation in scintilla_ime.mm
+namespace osx { namespace ime {
+	void inject(wxStyledTextCtrl *) { }
+	void invalidate(wxStyledTextCtrl *) { }
+	bool process_key_event(wxStyledTextCtrl *, wxKeyEvent&) { return false; }
+} }
 #endif
 
 wxString FontFace(std::string opt_prefix) {

src/utils.h

@@ -106,4 +106,13 @@ namespace osx {
 	bool activate_top_window_other_than(wxFrame *wx);
 	// Bring all windows to the front, maintaining relative z-order
 	void bring_to_front();
+
+namespace ime {
+	/// Inject the IME helper into the given wxSTC
+	void inject(wxStyledTextCtrl *ctrl);
+	/// Invalidate any pending text from the IME
+	void invalidate(wxStyledTextCtrl *ctrl);
+	/// Give the IME a chance to process a key event and return whether it did
+	bool process_key_event(wxStyledTextCtrl *ctrl, wxKeyEvent &);
+}
 }