summaryrefslogtreecommitdiff
path: root/svx/source/svdraw/textchaincursor.cxx
blob: 51c4d1d8ef8799df4b2b69bedbd4fe8d7c1dc94f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <textchain.hxx>
#include <textchaincursor.hxx>
#include <svx/svdedxv.hxx>
#include <svx/svdoutl.hxx>
#include <vcl/event.hxx>

// XXX: Possible duplication of code in behavior with stuff in ImpEditView (or ImpEditEngine) and OutlinerView

// XXX: We violate Demeter's Law several times here, I'm afraid

TextChainCursorManager::TextChainCursorManager(SdrObjEditView *pEditView, const SdrTextObj *pTextObj) :
    mpEditView(pEditView),
    mpTextObj(pTextObj),
    mbHandlingDel(false)
{
    assert(mpEditView);
    assert(mpTextObj);

}

bool TextChainCursorManager::HandleKeyEvent( const KeyEvent& rKEvt )
{
    ESelection aNewSel;
    CursorChainingEvent aCursorEvent;

    // check what the cursor/event situation looks like
    bool bCompletelyHandled = false;
    impDetectEvent(rKEvt, aCursorEvent, aNewSel, bCompletelyHandled);

    if (aCursorEvent == CursorChainingEvent::NULL_EVENT)
        return false;
    else {
        HandleCursorEvent(aCursorEvent, aNewSel);
        // return value depends on the situation we are in
        return bCompletelyHandled;
    }
}

void TextChainCursorManager::impDetectEvent(const KeyEvent& rKEvt,
                                            CursorChainingEvent& rOutCursorEvt,
                                            ESelection& rOutSel,
                                            bool& rOutHandled)
{
    SdrOutliner *pOutl = mpEditView->GetTextEditOutliner();
    OutlinerView *pOLV = mpEditView->GetTextEditOutlinerView();

    SdrTextObj *pNextLink = mpTextObj->GetNextLinkInChain();
    SdrTextObj *pPrevLink = mpTextObj->GetPrevLinkInChain();

    KeyFuncType eFunc = rKEvt.GetKeyCode().GetFunction();

    // We need to have this KeyFuncType
    if (eFunc !=  KeyFuncType::DONTKNOW && eFunc != KeyFuncType::DELETE)
    {
        rOutCursorEvt = CursorChainingEvent::NULL_EVENT;
        return;
    }

    sal_uInt16 nCode = rKEvt.GetKeyCode().GetCode();
    ESelection aCurSel = pOLV->GetSelection();

    ESelection aEndSelPrevBox(100000, 100000);

    sal_Int32 nLastPara = pOutl->GetParagraphCount()-1;
    OUString aLastParaText = pOutl->GetText(pOutl->GetParagraph(nLastPara));
    sal_Int32 nLastParaLen = aLastParaText.getLength();

    ESelection aEndSel(nLastPara, nLastParaLen);
    bool bAtEndOfTextContent = aCurSel == aEndSel;

    // Possibility: Are we "pushing" at the end of the object?
    if (nCode == KEY_RIGHT && bAtEndOfTextContent && pNextLink)
    {
        rOutCursorEvt = CursorChainingEvent::TO_NEXT_LINK;
        // Selection unchanged: we are at the beginning of the box
        rOutHandled = true; // Nothing more to do than move cursor
        return;
    }

    // Possibility: Are we "pushing" at the end of the object?
    if (eFunc == KeyFuncType::DELETE && bAtEndOfTextContent && pNextLink)
    {
        rOutCursorEvt = CursorChainingEvent::TO_NEXT_LINK;
        // Selection unchanged: we are at the beginning of the box
        rOutHandled = false; // We still need to delete the characters
        mbHandlingDel = true;
        return;
    }

    ESelection aStartSel(0, 0);
    bool bAtStartOfTextContent = aCurSel == aStartSel;

    // Possibility: Are we "pushing" at the start of the object?
    if (nCode == KEY_LEFT && bAtStartOfTextContent && pPrevLink)
    {
        rOutCursorEvt = CursorChainingEvent::TO_PREV_LINK;
        rOutSel = aEndSelPrevBox; // Set at end of selection
        rOutHandled = true; // Nothing more to do than move cursor
        return;
    }

    // Possibility: Are we "pushing" at the start of the object and deleting left?
    if (nCode == KEY_BACKSPACE && bAtStartOfTextContent && pPrevLink)
    {
        rOutCursorEvt = CursorChainingEvent::TO_PREV_LINK;
        rOutSel = aEndSelPrevBox; // Set at end of selection
        rOutHandled = false; // We need to delete characters after moving cursor
        return;
    }

    // If arrived here there is no event detected
    rOutCursorEvt = CursorChainingEvent::NULL_EVENT;

}

void TextChainCursorManager::HandleCursorEventAfterChaining(
                            const CursorChainingEvent aCurEvt,
                            const ESelection& aNewSel)

{
     // Special case for DELETE handling: we need to get back at the end of the prev box
    if (mbHandlingDel) {
        // reset flag
        mbHandlingDel = false;

        // Move to end of prev box
        SdrTextObj *pPrevLink = mpTextObj->GetPrevLinkInChain();
        ESelection aEndSel(100000, 100000);
        impChangeEditingTextObj(pPrevLink, aEndSel);
        return;
    }

    // Standard handling
    HandleCursorEvent(aCurEvt, aNewSel);
}


void TextChainCursorManager::HandleCursorEvent(
                            const CursorChainingEvent aCurEvt,
                            const ESelection& aNewSel)

{

    OutlinerView* pOLV = mpEditView->GetTextEditOutlinerView();
    SdrTextObj *pNextLink = mpTextObj->GetNextLinkInChain();
    SdrTextObj *pPrevLink = mpTextObj->GetPrevLinkInChain();


    switch ( aCurEvt ) {
            case CursorChainingEvent::UNCHANGED:
                // Set same selection as before the chaining (which is saved as PostChainingSel)
                // We need an explicit set because the Outliner is messed up
                //    after text transfer and otherwise it brings us at arbitrary positions.
                pOLV->SetSelection(aNewSel);
                break;
            case CursorChainingEvent::TO_NEXT_LINK:
                mpTextObj->GetTextChain()->SetSwitchingToNextBox(mpTextObj, true);
                impChangeEditingTextObj(pNextLink, aNewSel);
                break;
            case CursorChainingEvent::TO_PREV_LINK:
                impChangeEditingTextObj(pPrevLink, aNewSel);
                break;
            case CursorChainingEvent::NULL_EVENT:
                // Do nothing here
                break;
    }

}

void TextChainCursorManager::impChangeEditingTextObj(SdrTextObj *pTargetTextObj, ESelection aNewSel)
{
    assert(pTargetTextObj);

    mpEditView->SdrEndTextEdit();
    mpEditView->SdrBeginTextEdit(pTargetTextObj);
    // OutlinerView has changed, so we update the pointer
    OutlinerView *pOLV = mpEditView->GetTextEditOutlinerView();
    pOLV->SetSelection(aNewSel);

    // Update reference text obj
    mpTextObj = pTargetTextObj;
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */