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71 lines
2.7 KiB
C++
71 lines
2.7 KiB
C++
#ifndef ESCHER_TEXT_INPUT_H
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#define ESCHER_TEXT_INPUT_H
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#include <escher/scrollable_view.h>
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#include <escher/text_cursor_view.h>
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#include <assert.h>
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#include <string.h>
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class TextInput : public ScrollableView, public ScrollViewDataSource {
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public:
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TextInput(Responder * parentResponder, View * contentView) : ScrollableView(parentResponder, contentView, this) {}
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void setFont(const KDFont * font) { contentView()->setFont(font); }
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const char * text() const { return nonEditableContentView()->text(); }
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bool removePreviousGlyph();
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const char * cursorLocation() const { return nonEditableContentView()->cursorLocation(); }
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bool setCursorLocation(const char * location);
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virtual void scrollToCursor();
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protected:
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class ContentView : public View {
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public:
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ContentView(const KDFont * font) :
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View(),
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m_cursorView(),
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m_font(font),
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m_cursorLocation(nullptr)
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{}
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void setFont(const KDFont * font);
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const KDFont * font() const { return m_font; }
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const char * cursorLocation() const { assert(m_cursorLocation != nullptr); return m_cursorLocation; }
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void setCursorLocation(const char * cursorLocation);
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virtual const char * text() const = 0;
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virtual bool insertTextAtLocation(const char * text, const char * location) = 0;
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virtual bool removePreviousGlyph() = 0;
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virtual bool removeEndOfLine() = 0;
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KDRect cursorRect();
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protected:
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virtual void layoutSubviews() override;
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void reloadRectFromPosition(const char * position, bool lineBreak = false);
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virtual KDRect glyphFrameAtPosition(const char * buffer, const char * position) const = 0;
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TextCursorView m_cursorView;
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const KDFont * m_font;
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const char * m_cursorLocation;
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virtual KDRect dirtyRectFromPosition(const char * position, bool lineBreak) const;
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private:
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int numberOfSubviews() const override { return 1; }
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View * subviewAtIndex(int index) override {
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assert(index == 0);
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return &m_cursorView;
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}
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virtual const char * editedText() const = 0;
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virtual size_t editedTextLength() const = 0;
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};
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/* If the text to be appended is too long to be added without overflowing the
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* buffer, nothing is done (not even adding few letters from the text to reach
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* the maximum buffer capacity) and false is returned. */
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bool insertTextAtLocation(const char * textBuffer, const char * location);
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bool removeEndOfLine();
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ContentView * contentView() {
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return const_cast<ContentView *>(nonEditableContentView());
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}
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virtual const ContentView * nonEditableContentView() const = 0;
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bool moveCursorLeft();
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bool moveCursorRight();
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private:
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virtual void willSetCursorLocation(const char * * location) {}
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virtual bool privateRemoveEndOfLine();
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};
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#endif
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