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51 lines
1.1 KiB
C++
51 lines
1.1 KiB
C++
/*
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* StateTracker.h
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*
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* track specific PDF state
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* manage reusable CSS classes
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*
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* Copyright (C) 2013 Lu Wang <coolwanglu@gmail.com>
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*/
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#ifndef STATE_TRACKER_H__
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#define STATE_TRACKER_H__
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#include <GfxState.h>
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namespace pdf2htmlEX {
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class StateTrackerBase
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{
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public:
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virtual ~StateTracker(void);
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// usually called at the beginning of a page
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virtual void reset(void) = 0;
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/*
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* update() is called when PDF updates the state
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* check_state() is called when we really need the new state
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*
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* There could be a number of calls to update() between 2 consecutive calls to check_state()
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* So usually we just mark as changed in update, and actually retrive from the state in check_state()
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*/
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virtual void update(GfxState * state) = 0;
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/*
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* return if state has been updated
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*
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* if force is true, do check the state if there is no update() called before
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* useful for updateAll
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*/
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virtual bool check_state(GfxState * state, bool force) = 0;
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long long get_id() const { return id; }
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protected:
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long long id; // For CSS classe
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};
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} // namespace pdf2htmlEX
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#endif //STATE_TRACKER_H__
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